MitoPedia: O2k hardware

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MitoPedia: O2k hardware


Template NextGen-O2k.jpg
O2k-Open Support


MitoPedia O2k and high-resolution respirometry: O2k-Open Support 



MitoPedia: O2k hardware is a component of O2k-Open Support.
It lists hardware-related topics and the O2k-Modules and main components of the O2k system.


See also
» Complete list of O2k components O2k-Products


TermAbbreviationDescription
Barometric pressurepb [Pa]Barometric pressure, pb, is an important variable measured for calibration of oxygen sensors in solutions equilibrated with air. The atm-standard pressure (1 atm = 760 mmHg = 101.325 kPa) has been replaced by the SI standard pressure of 100 kPa. The partial pressure of oxygen, pO2, in air is a function of barometric pressure, which changes with altitude and locally with weather conditions. The partial oxygen pressure declines by 12 % to 14 % per 1,000 m up to 6,000 m altitude, and by 15 % to 17 % per 1,000 m between 6,000 and 9,000 m altitude. The O2k-Barometric Pressure Transducer is built into the Oroboros O2k as a basis for accurate air calibrations in high-resolution respirometry. For highest-level accuracy of calculation of oxygen pressure, it is recommended to compare at regular intervals the barometric pressure recording provided by the O2k with a calibrated barometric pressure recording at an identical time point and identical altitude. The concept of gas pressure or barometric pressure can be related to the generalized concept of isomorphic pressure.
Block temperatureThe block temperature of the Oroboros O2k is the continuously measured temperature of the copper block, housing the two glass chambers of the O2k. The block temperature is recorded by DatLab as one of the O2k system channels.
ChannelF7» See O2k signals and output
Cover-Slip\black
Cover-Slip black.JPG
A Cover-Slip should be placed on top of the O2k-Stopper to minimize contamination and evaporation of liquid extruding from the capillary of the stopper. The Cover-Slips do not exert any direct effect on oxygen backdiffusion into the O2k-chamber. Use the the Cover-Slip\black to avoid light penetration and disturbance of fluorescence signals and generally for optical measurements in the O2k.
Electrolyte\Reference-Electrode
Electrolyte Reference-Electrode.jpg
Electrolyte\Reference-Electrode for Reference-Electrode\2.4 mm
Filter Set AmR
Filter Set AmR.JPG
Filter Set AmR: Set of filters for the determination of H2O2 production with Amplex UltraRed. These filters should be used together with Fluorescence-Sensor Green. The filter set consists of 6 LED filters (round) and 6 photodiode filters (rectangular).
Filter Set MgG / CaG
Filter Set MgG CaG.JPG
Filter set MgG / CaG: Set of filters for the determination of concentraions of Mg2+ or Ca2+ with the fluorophores Magnesium green and Calcium green, respectively. These filters should be used together with Fluorescence-Sensor Blue or Smart Fluo-Sensor Blue. The filter set consists of 6 LED filters (round) and 6 photodiode filters (rectangular).
Filter Set Saf
Filter Set Saf.JPG
Filter set Saf: Set of filters for the (qualitative) determination of mitochondrial membrane potential with Safranin. These filters should be used together with Fluorescence-Sensor Blue or Smart Fluo-Sensor Blue. The filter set consists of 6 LED filters (round) and 6 photodiode filters (rectangular).
Filter-Cap
Filter-Cap.JPG
Filter-Cap: O2k-Fluo LED2-Module (O2k-Series D to G) sensors (Fluorescence-Sensor Green and Fluorescence-Sensor Blue) and O2k-FluoRespirometer (O2k-Series H) sensors (Smart Fluo-Sensor Green and Smart Fluo-Sensor Blue) are equipped with a removable Filter-Cap for exchange of optical filters for the optical pathways from the LED to the sample and from the sample to the photodiode.
Fluorescence-Sensor Blue
Fluorescence-Sensor Green.JPG
Fluorescence-Sensor Blue: excitation LED 465 nm (dominant wavelength), photodiode, Filter-Cap equipped with Filter Set Saf for measurement of mitochondrial membrane potential with Safranin when delivered. Filter sets for Magnesium green® / Calcium green® measurements are included.
Fluorescence-Sensor Green
Fluorescence-Sensor Green.JPG
Fluorescence-Sensor Green: excitation LED 525 nm (dominant wavelength), photodiode, Filter-Cap equipped with Filter Set AmR for Amplex UltraRed measurements when delivered.
FluorometryFluorometry (or fluorimetry) is the general term given to the method of measuring the fluorescent emission of a substance following excitation by light at a shorter wavelength.
Forceps for membrane application
Forcep for membrane application.jpg
Forceps for membrane application: for OroboPOS and ISE membrane application; do not use for tissue preparation.
Forceps\stainless Steel\angular Tip\fine
Forcep for tissue preparation angular tip.jpg
Forceps\stainless Steel\angular Tip\fine: for tissue preparation, stainless steel. Two pairs are used particularly for muscle fiber separation.
Forceps\stainless Steel\rounded Tip\sharp
Forcep for tissue preparation rounded tip.jpg
Forceps\stainless Steel\rounded Tip\sharp: for tissue preparation, stainless steel, antimagnetic. One pair is recommended for placing the tissue sample onto the microbalance and for handling in combination with Forceps\stainless Steel\straight Tip\sharp.
Forceps\stainless Steel\straight Tip\sharp
Forcep for tissue preparation straight tip.jpg
Forceps\stainless Steel\straight Tip\sharp: for tissue preparation, stainless steel, antimagnetic. One pair is recommended for insertion of the sample into the O2k-chamber and for handling in combination with Forceps\stainless Steel\rounded Tip\sharp.
GainThe gain is an amplification factor applied to an input signal to increase the output signal.
High signal at zero oxygenR0A high signal at zero oxygen may be observed during zero calibration. The following instructions show how to further localize and possibly solve this technical problem.
High-resolution respirometryHRR
O2k-FluoRespirometer
High-resolution respirometry, HRR, is the state-of-the-art approach in mitochondria and cell research to measure respiration in various types of mitochondrial preparations and living cells combined with MultiSensor modules. Mitochondrial function and dysfunction have gained an increasing interest over the past years, reflecting growing awareness of the fact that mitochondria play a pivotal role in human health and disease. Combining instrumental accuracy and reliability with versatility of applicable protocols - allowing practically unlimited addition and combination of substrates, inhibitors and uncouplers - mitochondrial respiratory pathways may be analyzed in detail to evaluate even minor alterations in respiratory pathway control and/or capacity. The most advanced way to analyze mitochondrial function is by means of high-resolution respirometry with the Oroboros O2k. The O2k is a sole source apparatus, with no other available instrument meeting its specifications for high-resolution respirometry. Substrate-uncoupler-inhibitor titration (SUIT) protocols allow the diagnosis of numerous mitochondrial pathway and coupling defects in a single respirometric assay. Technologically, HRR is based on the Oroboros O2k, combining optimized chamber design, application of oxygen-tight materials, electrochemical sensors, Peltier-temperature control, and specially developed software features (DatLab) to obtain the unique sensitive and quantitative resolution of oxygen concentration and oxygen flux, with both, a closed-chamber or open-chamber mode of operation (TIP2k). Standardized calibration of the polarographic oxygen sensor (static sensor calibration), calibration of the sensor response time (dynamic sensor calibration), and evaluation of instrumental background oxygen flux (systemic flux compensation) provide the experimental basis for high accuracy of quantitative results and quality control in HRR. HRR can be extended for MultiSensor analysis by using the O2k-FluoRespirometer. Smart Fluo-Sensors are integrated into the O2k to measure simultaneously fluorometric signals using specific fluorophores. Potentiometric modules are available with ion selective electrodes (pH, TPP+). The NextGen-O2k is the all-in-one device including the Q-redox sensor and a PhotoBiology (PB) module.
ISE Package 1 TPP or Ca
ISE Package 1 TPP or Ca.JPG
O2k-TPP+ and Ca2+ ISE\1 Chamber: ISE-Package for 1 TPP+ and Ca2+ electrode.
ISE-Ca2+ Membranes
Ca2+ membranes.jpg
ISE-Ca2+ Membranes: PVC, 4 mm diameter, box of 5 membranes. To be used with the O2k-TPP+ ISE-Module.
ISE-Compressible Tube
ISE-Compressible Tube.JPG
ISE-Compressible Tube for Ion-Selective Electrode TPP+ and Ca2+.
ISE-Filling Syringe
ISE-Filling Syringe.JPG
ISE-Filling Syringe with needle for Ion-Selective Electrode TPP+ and Ca2+.
ISE-Inner Glass Electrode
ISE-Inner Glass Electrode.JPG
ISE-Inner Glass Electrode of ISE, with Ag/AgCl- and Pt-wire
ISE-Membrane Mounting Tool
ISA-Membrane Mounting Tool.JPG
ISE-Membrane Mounting Tool for Ion-Selective Electrode TPP+ and Ca2+. O2k-TPP+ ISE-Module: mounting tool included.
ISE-Membrane Seal
ISE-Membrane Seal.JPG
ISE-Membrane Seal for Ion-Selective Electrode TPP+ and Ca2+.
ISE-TPP+ Membranes
ISE-TPP+ Membranes.JPG
ISE-TPP+ Membranes, PVC, 4 mm diameter, box of 5 membranes.
ISS-Filter and Tubing
ISS-Filter and Tubing.JPG
ISS-Filter and Tubing, ISS-Integrated Suction System.
ISS-Lid
ISS-Lid.JPG
ISS-Lid, for ISS-Waste Bottle, component of the ISS-Integrated Suction System.
ISS-Waste Bottle
ISS-Waste Bottle.JPG
ISS-Waste Bottle, 2-liter, component of the ISS-Integrated Suction System.
Inside the O2kA glance inside the Oroboros O2k
Ion-Selective Electrode TPP+ and Ca2+
Ion-Selective Electrode TPP+ and Ca2+.JPG
Ion-Selective Electrode TPP+ and Ca2+: ISE with 6 mm outer diameter shaft, for Stopper\white PVDF\angular Shaft\side+6.2+2.6 mm Port. O2k-TPP+ ISE-Module: 2 ISE.
Light-emitting diodeLEDA light-emitting diode (LED) is a light source (semiconductor), used in many every-day applications and specifically in fluorometry. LEDs are available for specific spectral ranges across wavelengths in the visible, ultraviolet, and infrared range.
Microbalance-Transport Case
Microbalance-Transport Case.jpg
Microbalance transport case, not suitable for shipping
Microsyringe\10 mm3 51/0.13 mm
Hamilton Syringes for Manual Titration.jpg
Hamilton Microsyringe\10 mm3 51/0.13 mm for manual titrations, 10 mm3 volume; fixed injection needle with rounded tip: 51 mm length, 0.13 mm inner diameter.
Microsyringe\100 mm3 51/0.41 mm
Microsyringe 100 mm3 51 0.41 mm - Kopie.JPG
Hamilton Microsyringe\100 mm3 51/0.41 mm for manual titrations, 100 mm3 volume; fixed needle with rounded tip: 51 mm length, 0.41 mm inner diameter. It is recommended for injections of suspensions of isolated mitochondria.
Microsyringe\200 mm3\TIP2k
Microsyringe200 mm3TIP2k.JPG
Microsyringe\200 mm3\TIP2k: Microinjection syringe for Titration-Injection microPump, 200 mm3 (µl), fixed injection needle with rounded tip, with spacers.
Microsyringe\25 mm3 51/0.15 mm
Microsyringe 25 mm3 51 0.15 mm.JPG
Hamilton Microsyringe\25 mm3 51/0.15 mm for manual titrations, 25 mm3 volume; fixed needle with rounded tip: 51 mm length, 0.15 mm inner diameter.
Microsyringe\50 mm3 51/0.15 mm
Microsyringe 100 mm3 51 0.41 mm - Kopie.JPG
Hamilton Microsyringe\50 mm3 51/0.15 mm for manual titrations, 50 mm3 volume; fixed needle with rounded tip: 51 mm length, 0.15 mm inner diameter.
Microsyringe\500 mm3\TIP2k
Microsyringe 500 mm3 TIP2k.JPG
Microsyringe\500 mm3\TIP2k: Microinjection syringe for Titration-Injection microPump, 500 mm3 (µl), fixed injection needle with rounded tip, with spacers.
O-ring sV\Viton\9.5x1 mm
34310-02.jpg
O-ring sV\Viton\9.5x1 mm, for PEEK Stopper sV, 2 are mounted on each PEEK Stopper sV, box of 8 as spares.
O-ring\Viton\12.5x1 mm
O-ringViton12.5x1 mm.jpg
O-ring\Viton\12.5x1 mm, for PVDF or PEEK O2k-Stoppers (2-mL O2k-Chamber), box of 8 as spares.
O2-Zero Powder
O2-Zero Powder.jpg
O2-Zero Powder, dithionite (Na2S2O4), for zero-oxygen calibration of the OroboPOS.
O2kO2kO2k - Oroboros O2k: the modular system for high-resolution respirometry.
O2k repairO2k repair of defective hardware may require replacement of spare parts. Some electronic or mechanical defects may be solved only by repair of the O2k in the electronics workshop of Oroboros Instruments, e.g., a defective Peltier unit (temperature control).
O2k series
The serial number of each O2k is shown on a sticker at the rear of the O2k.
The O2k series is specified as the capital letter in the O2k serial number of the Oroboros O2k. A serial number G-#### or H-#### denotes an Oxygraph from the G or H series, while A-#### denotes an O2k from the A series. With DatLab running real-time connected to the O2k, the serial number of the currently connected O2k is displayed: (1) in the right corner of the status line, besides the DatLab version number (bottom), and (2) in windows O2k control [F7] and O2k configuration.
O2k signals and outputThree electronic channel types are available in the O2k-MultiSensor system. All channels are available twofold (dual-data), for O2k-Chambers A (left) and B (right), based on numerical signals sent at a fixed data sampling time interval (default: 2 s; range 0.2 s to >10 s).
O2k-Chamber sV
33100-01.jpg
O2k-Chamber sV: 12 mm inner diameter, Duran® glass polished, with standard operation volume V of 0.5 mL.
O2k-Fluo LED2-Module
Fluorescence-Control Unit lettered.jpg
The O2k-Fluo LED2-Module is a component of the O2k-Fluorometer (O2k-Series D to G). It is an amperometric add-on module to the O2k-Core (O2k-Series D to G), adding a new dimension to high-resolution respirometry. Optical sensors are inserted through the front window of the O2k-glass chambers, for measurement of hydrogen peroxide production (Amplex® UltraRed), ATP production (Magnesium Green™), mt-membrane potential (Safranin, TMRM, Rhodamine 123), Ca2+ (Calcium Green™), and numerous other applications open for O2k-user innovation.
O2k-Fluo Smart-Module
12100-03.jpg
The O2k-Fluo Smart-Module is a component of the O2k-FluoRespirometer (O2k-Series H). It is an amperometric add-on module to the O2k-Respirometer, adding a new dimension to high-resolution respirometry. Optical sensors are inserted through the front window of the O2k-glass chambers, for measurement of hydrogen peroxide production (Amplex® UltraRed), ATP production (Magnesium Green™), mt-membrane potential (Safranin, TMRM), Ca2+ (Calcium Green™), and numerous other applications open for O2k-user innovation.
O2k-FluoRespirometer
O2k-FluoRespirometer
The Oroboros O2k-FluoRespirometer (O2k-Series H) - the experimental system complete for high-resolution respirometry (HRR), including fluorometry, the TIP2k and the O2k-sV-Module allowing simultaneous monitoring of oxygen consumption together with either ROS production (AmR), mt-membrane potential (TMRM, Safranin and Rhodamine 123), Ca2+ (CaG) or ATP production (MgG). The O2k-FluoRespirometer supports all add-on O2k-Modules: O2k-TPP+ ISE-Module, O2k-pH ISE-Module, O2k-NO Amp-Module, enabling measurement of mt-membrane potential with ion sensitive electrodes (ISE for TPP+ or TPMP+ ) or pH.
O2k-Fluorometer Series GO2k-Fluorometer Series G (up to 2017-July) - the experimental system complete for high-resolution respirometry (HRR) combined with fluorometry. The O2k-Fluorometer includes the O2k-Core, O2k-Fluo LED2-Module and TIP2k, and supports all other add-on O2k-Modules of the Oroboros O2k. The O2k is a sole source apparatus with no other instruments meeting its test experiments on O2k-Specifications.
O2k-Fuse Power Plug\M2.5 A\5x20 mm
Fuses mains.jpg
O2k-Fuse Power Plug\M2.5 A\5x20 mm: This item is a standard component of the O2k-Assembly Kit (O2k-FluoRespirometer), mounted on the socket for the O2k-Main Power Cable, at the rear panel of the O2k-Main Unit.
O2k-Innovation descriptionO2kThe NextGen-O2k (NextGeneration O2k by Oroboros Instruments) is in development, building upon and extending the concept of the O2k-Fluorometer elaborated within the K-Regio Project MitoCom O2k-Fluorometer (2011-2014). To broaden the specifications of the O2k-FluoRespirometer, the NextGen-O2k will combine high-resolution respirometry with a Q-Module for measurements of Q-redox state and a PB-Module to study PhotoBiology (including photosynthesis). It is our ultimate goal to further extend the NextGen-O2k with O2k-Spectrofluorometry (including ratiometric measurements), NADH autofluorescence, and O2k-Spectrophotometry (allowing for simultaneous measurement of redox states of the cytochromes aa3, b, and c). The Oroboros NextGen-O2k will have integrated optical elements beyond the modular options of the presently available Oroboros O2k.
O2k-Main Power CableO2k-Main Power Cable, for connecting the main unit to the power supply.
O2k-Main Power Cable\120 V\US-CA
O2k-Main Power Cable 120 V US-CA.JPG
O2k-Main Power Cable\120 V\US-CA, USA and Canada (120 V).
O2k-Main Power Cable\230 V\AU-NZ
O2k-Main Power Cable 230 V AU-NZ.JPG
O2k-Main Power Cable\AU-NZ, Australia and New Zealand (230 V).
O2k-Main Power Cable\230 V\Europe
O2k-Main Power Cable 230 V Europe.JPG
O2k-Main Power Cable\230 V\Europe.
O2k-NO Amp-Module
O2k-NO Amp-Module.jpg
O2k-NO Amp-Module: NO-sensor compatability pack an amperometric add-on for O2k-MultiSensor application The NO sensor is not included.
O2k-Peltier MitopediaO2k-Peltier Temperature Control: Built-in electronic thermostat controlling temperature for two O2k-Chambers in the range of 4 to 47 °C; ±0.002 °C (at room temperature). Continuous recording of the O2k-Copper Block temperature with DatLab. Temperature change from 20 to 30 °C within 15 min; cooling from 30 to 20 °C within 20 min. Integral component of the O2k-Main Unit. The electronic temperature control of the O2k replaced the conventional water jacket.
O2k-SpecificationsO2k versus multiwell respirometer: O2k stands for Oroboros O2k and high-resolution respirometry, meeting powerful quality criteria securing high output and pioneering state-of-the-art comprehensive OXPHOS analysis of substrate control and coupling control of mitochondrial function. 'High throughput' stands for disposable multiwell systems - expensive, with limited scope and extremely high running costs. In respirometry, high throughput is not equivalent to high output. If you’re using a biased instrument, it doesn’t matter how many measurements you take – you’re aiming at the wrong target (Silver 2012 Penguin Press).
O2k-TPP+ ISE-Module
TPP new.jpg
O2k-TPP+ ISE-Module: Potentiometric ion-selective electrodes for measurement of mitochondrial membrane potential
O2k-chamber
O2k-Chamber.jpg
O2k-Chamber: Duran® glass polished, with standard operation volumes (V) of 2.0 mL or 0.5 mL (small chamber volume in the O2k-sV-Module, 12 mm inner diameter). The optical properties of Duran® allow application of fluorometric sensors (Duran® optical properties).
O2k-pH ISE-Module
PH new.jpg
O2k-pH ISE-Module: two pH electrodes and reference electrodes and accessories
O2k-sV-ModuleO2k-sV-Module
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The O2k-sV-Module is the O2k small-volume module, comprised of two Duran® glass chambers of 12 mm inner diameter specifically developed to perform high-resolution respirometry with reduced amounts of biological sample, and all the components necessary for a smaller operation volume V of 0.5 mL. The current DatLab version is included in the delivery of this revolutionary module.
OroboPOS
OroboPOS.JPG

The OroboPOS is a polarographic oxygen sensor (POS), with an amperometric mode of operation. The OroboPOS meets the highest quality criteria in terms of linearity, stability and sensitivity of the signal. The Clark type polarographic oxygen sensor (POS) remains the gold standard for measuring dissolved oxygen in biomedical, environmental and industrial applications over a wide dynamic oxygen range.

It consists of a gold cathode, a silver/silverchloride anode and a KCl electrolyte reservoir separated from the sample by a 25 µm membrane (FEP). The main body of the OroboPOS is made of PEEK. With application of a polarization voltage (0.8 V), a current is obtained as an amperometric signal, which is converted to a voltage.
OroboPOS-Connector
POS connector and cable connection.jpg
OroboPOS-Connector (blue POM), with male connection to OroboPOS sensor head (POS) and with cable and male plug fitting into O2k-Main Unit.
OroboPOS-Electrolyte Powder
POS Electrolyte powder.jpg
OroboPOS-Electrolyte Powder, KCl. The powder is dissolved in 10 ml distilled water to yield a 1 M KCl solution.
OroboPOS-Holder
Pos holder.JPG
The OroboPOS-Holder (POS-Holder), made from blue POM, is screwed into the copper block of the O2k-Main Unit, guiding the OroboPOS-Connector with the OroboPOS sensor head (POS) to the 2-mL O2k-chamber, and keeping the OroboPOS-Connector in a fixed position for sealing the O2k-chamber with the OroboPOS-Seal Tip. In addition, the OroboPOS-Holder fixes the O2k-Chamber in an accurate rotational position by pressing against the angular cut of the glass chamber. Two units of this item are standard components mounted on the O2k-Main Unit.
OroboPOS-Holder sV
32300-01.jpg
OroboPOS-Holder sV (POS-Holder sV), made from black POM, to be screwed into the copper block of the O2k-Main Unit, guiding the OroboPOS-Connector with the OroboPOS sensor head (POS) to the O2k-Chamber sV, and keeping the OroboPOS-Connector in a fixed position for sealing the O2k-Chamber sV with the OroboPOS-Seal Tip. In addition, the OroboPOS-Holder sV fixes the O2k-Chamber sV in an accurate rotational position by pressing against the angular cut of the glass chamber.
OroboPOS-MembranesFEP-membranes
POS membranes.jpg
OroboPOS-Membranes, FEP 25 µm; 40/Pck.
OroboPOS-Mounting Tool
POS mounting tool for membrane application 02.JPG
OroboPOS-Mounting Tool for application of OroboPOS-Membranes. It consists of two parts, (i) the membrane guide (larger diameter) and (ii) the membrane ring holder with O-ring\Viton\6x1 mm for holding the OroboPOS-Membrane Ring during membrane application. Since the O2k-Series G-0075 membrane ring holder have a 2 mm extended ridge for a better grip.
OroboPOS-Polishing Cloth
POS polishing cloth for cathode cleaning.jpg
OroboPOS-Polishing Cloth for cathode cleaning. Replace the OroboPOS-Polishing Cloth at intervals. A two-year interval may be considered in cases of intensive use.
OroboPOS-Polishing Powder
POS polishing powder for cathode cleaning.jpg
OroboPOS-Polishing Powder for cathode cleaning.
OroboPOS-Seal Tip
POS seal tip.jpg
OroboPOS-Seal Tip, black butyl rubber gasket with 3 mm pore. 4/Pck, for sealing the OroboPOS (sensor head) against the O2k-Chamber. Push the wetted OroboPOS-Seal Tip over the POS-sensor head, with the pore positioned centrally, not covering any peripheral area of the gold cathode. Do not stretch the gasket across the POS-sensor head.
Oroboros O2k-Core (O2k-Series D - G)Oroboros O2k-Core (O2k-Series D - G) - the experimental system complete for basic high-resolution respirometry (HRR). The O2k-Core includes the O2k-Main Unit with stainless steel housing, O2k-Assembly Kit, two OroboPOS (polarographic oxygen sensors) and OroboPOS-Service Kit, DatLab software, the ISS-Integrated Suction System and the O2k-Titration Set. The O2k-Core supports all add-on O2k-Modules of the O2k.

On-line display of oxygen flux (rate of respiration) is provided in addition to the conventional 'oxygraphic' plot of oxygen concentration over time. Highest signal stability minimizes the required amounts of biological sample, and provides the basis for resolution in the extreme low-oxygen range. Peltier temperature control provides a thermal stability at ±0.002 °C in the range of 4 °C to 47 °C at typical constant room temperature. Electronically controlled PVDF or PEEK stirrers are integrated in the two-chamber design of the O2k, and a barometric pressure transducer enables automatic oxygen calibrations implemented in the DatLab software.

The O2k is a sole source apparatus with no other instruments meeting its specifications.
Oxygen sensor testPOS testThe O2 sensor test is an important component of the MitoFit Quality Control System. The OroboPOS test is described in detail in MiPNet06.03 POS-calibration-SOP, is performed after switching on the Oroboros O2k, and is required as a basis of technical service of the instrument.
PC requirementsThe PC requirements for controlling an O2k and data recording with DatLab are found here.
PH-Glass electrode
PH-Glass Electrode.JPG
pH-Glass electrode with BNC plug.
Pipette\Plastic\1 ml ungraded
Pipette Plastic 1 ml-ungraded.JPG
Pipette\Plastic\1 mL ungraded, for filling electrolyte into the reservoir of the OroboPOS.
Plunger\10 mm3
Plunger 10 mm3.JPG
Plunger\10 mm3 for Microsyringe\10 mm3 51/0.13 mm, spare.
Polarization voltageUA polarization voltage of 600 mV to 800 mV is applied between anode and cathode of the polarographic oxygen sensor, resulting in a current when oxygen is consumed. The current is converted by the electronics to a voltage (raw signal) which must not be confused with the polarization voltage.
Polarographic oxygen sensorPOSPolarographic oxygen sensors (POS) are operated with a polarization voltage between the cathode and anode, connected by an electrolyte. Cathode, anode and electrolyte are separated from the analyte by an oxygen-permeable membrane. Oxygen is reduced at the cathode such that the local oxygen concentration is maintained at zero, and diffuses along the concentration gradient from the stirred medium to the cathode, resulting in a linear calibration between oxygen partial pressure and electric current [Amp] (amperometric mode of operation). The OroboPOS is the POS applied in the Oroboros O2k.
PotentiometryPotentiometry is the general term given to the method of measuring the electric potential difference between two electrodes connected by an electrolytic solution. The potential of the reference electrode is constant. The other electrode is called the indicator electrode. If this is an ion-selective electrode which is in equilibrium with the solution, the measured electric potential difference is proportional to the (negative) logarithm of the activity of a specific ion in the solution. Examples are the pH glass electrode for measurement of pH, and the TPP+ electrode for measurement of pTPP and calculation of mt-membrane potential.
Power O2k Numbers
Power O2k Numbers.JPG
Power O2k Numbers: Single number to label the O2k in a Power O2k-Lab.
Power O2k-FluoRespirometer
Power O2k-FluoRespirometer
Power O2k-FluoRespirometer - optional configuration as additional system for increasing output combined with the O2k-FluoRespirometer (O2k-Series H). The Power O2k-FluoRespirometer includes the TIP2k and the O2k-sV-Module, and supports all add-on O2k-Modules of the Oroboros O2k. It can be added to an existing Oroboros O2k of any O2k-Series. This application does not require an additional ISS-Integrated Suction System and O2k-Titration Set. Furthermore, the OroboPOS-Mounting Tool of the OroboPOS Service Tools can be used from the available O2k and is not included.
Power O2k-Respirometer
Power O2k notext.png
The Power O2k-Respirometer is an economical option for using additional O2k-Units to increase output in high-resolution respirometry.
Proton fluxJH+Volume-specific proton flux is measured in a closed system as the time derivative of proton concentration, expressed in units [pmol·s-1·mL-1]. Proton flux can be measured in an open system at steady state, when any acidification of the medium is compensated by external supply of an equivalent amount of base. The extracellular acidification rate (ECAR) is the change of pH in the incubation medium over time, which is zero at steady state. Volume-specific proton flux is comparable to volume-specific oxygen flux [pmol·s-1·mL-1], which is the (negative) time derivative of oxygen concentration measured in a closed system, corrected for instrumental and chemical background. pH is the negative logarithm of proton activity. Therefore, ECAR is of interest in relation to acidification issues in the incubation buffer or culture medium. The physiologically relevant metabolic proton flux, however, must not be confused with ECAR.
Reference-Electrode\2.4 mm
Reference Electrode 2.4 mm.jpg
Reference-Electrode\2.4 mm: 2.4 mm diameter glass shaft, for ISE.
Replacement-Barrel
Replacement-Barrel.jpg
Replacement-Barrel for Reference-Electrode\2.4 mm, 2.4 mm diameter glass.
Scissors\stainless steel\straight Tip\sharp
Scissors stainless steel straight Tip sharp.jpg
Scissors\stainless steel\straight Tip\sharp.
Screwdriver allen wrench
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Screwdriver allen wrench, a standard component of the O2k-FluoRespirometer and O2k-sV-Module.
Search for defective O2k componentsThe 2-chamber design of the O2k helps to search for defective O2k components, by switching components linked to O2k chambers A and B between sides A and B.
Shipping an O2kFor shipping an O2k or parts, standard operating procedures have to be followed to avoid damage of the instrument and unexpected delays. The O2k-Main Unit must be shipped only in Packing\O2k-Box 1, without O2k-chambers and without OroboPOS. Two O2k-Chamber Holders, two OroboPOS-Holders and two OroboPOS-Connectors are attached to the O2k-Main Unit for transport.
Shredder-Tubes
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Shredder-Tubes: consisting of Shredder Tube FT500-PS with Lysis Disk, serrated Shredder-Tube Ram Tool and Shredder-Tube Cap Tool, coral colour (Box of 100) and Shredder Tube FT500-PMS with Lysis Disk, serrated Shredder-Tube Ram Tool and Shredder-Tube Cap Tool, coral colour (Box of 100). There is no difference between the white and the coral shredder tubes, except that the white tubes are also approved for high pressure.
Smart Fluo-Sensor Blue
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Smart Fluo-Sensor Blue: Excitation LED 465 nm (dominant wavelenght) with short pass filter, emission (red) with long pass filter, individual sensors are calibrated with sensor-specific memory and direct input into DatLab 7 to obtain reproducible light intensities with different sensors, including photodiode, Filter-Cap equipped with Filter Set Saf for measurement of mitochondrial membrane potential with safranin and rhodamine 123. Filter Set MgG / CaG for Magnesium green and Calcium green measurements are included.
Smart Fluo-Sensor Green
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Smart Fluo-Sensor Green: Excitation LED 525 nm (dominant wavelength) with short pass filter, emission (red) with long pass filter, individual sensors are calibrated with sensor-specific memory and direct input into DatLab 7 to obtain reproducible light intensities with different sensors, including photodiode, Filter-Cap equipped with Filter Set AmR for Amplex UltraRed and TMRM measurements when delivered.
Startup O2k-Respirometer
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Startup O2k-Respirometer - the experimental system complete for basic high-resolution respirometry (HRR). The O2k-Respirometer includes the O2k-Main Unit with stainless steel housing, O2k-Assembly Kit, two OroboPOS (polarographic oxygen sensors) and OroboPOS-Service Kit, DatLab software, the ISS-Integrated Suction System, the O2k-Titration Set, and for performing high-resolution respirometry with reduced amounts of biological sample the O2k-sV-Module.


The O2k is a sole source apparatus with no other instruments meeting its specifications.
Stirrer-Bar sV\white PVDF\11.5x6.2 mm
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Stirrer-Bar sV\white PVDF\11.5x6.2 mm, operated in the 0.5-mL O2k-Chamber sV at constant stirring speed (standard is 750 rpm, or 12.5 Hz), to provide optimum mixing of the sample in the aqueous medium and ensure a stable signal of the polarographic oxygen sensor (OroboPOS) placed in a position of maximum current of the medium.
Stirrer-Bar\black PEEK\15x6 mm
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Stirrer-Bar\black PEEK\15x6 mm, for 2-mL O2k-Chamber, for specific optical applications to minimize optical interference.
Stirrer-Bar\white PVDF\15x6 mm
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Stirrer-Bar\white PVDF\15x6 mm, operated in the 2-mL O2k-chamber at constant stirring speed (standard is 750 rpm, or 12.5 Hz), to provide optimum mixing of the sample in the aqueous medium and ensure a stable signal of the polarographic oxygen sensor (OroboPOS) placed in a position of maximum current of the medium.
Stopper sV\black PEEK\conical Shaft\central Port
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Stopper sV\black PEEK\conical Shaft\central Port: with conical shaft (with PTFE, graphite, carbon fiber) and one central capillary (1.0 mm diameter; 48.9 mm length), Volume-Calibration Ring sV (A or B) for volume adjustment 0.5 mL; 2 mounted O-rings (O-ring sV\Viton\9.5x1 mm).
Stopper-Needle
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Stopper-Needle: Short needle for bubble extrusion from port of the ISE-stopper.
Stopper-Spacer
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Stopper-Spacer (or gas spacer) to set the O2k-Stopper into a standard position for a fixed gas phase above the aqueous phase in the 2-mL O2k-chamber, during air calibration or for injection of nitrogen, argon or oxygen into the gas phase; Stopper-Spacer thickness of 4mm (a deviation of +/- 10% possible).
Stopper\black PEEK\angular Shaft\side+6.2+2.6 mm Port
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Stopper\black PEEK\angular Shaft\side+6.2+2.6 mm Port, for application with ISE; side titration port and two additional holes (6.2 mm and 2.6 mm); angular bottom; including Volume-Calibration Ring (A or B); 2 mounted O-rings, with 8 spare O-rings (O-ring\Viton\12.5x1 mm).
Stopper\black PEEK\conical Shaft\central Port
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Stopper\black PEEK\conical Shaft\central Port: with conical shaft (with PTFE, graphite, carbon fiber) and one central capillary (1.3 mm diameter; 50.6 mm length), Volume-Calibration Ring (A or B) for volume adjustment 1.5 to 3.2 ml; 2 mounted O-rings, with 8 spare O-rings (O-ring\Viton\12.5x1 mm). The black PEEK stoppers are required for optical O2k-MultiSensor Modules.
Stopper\black PEEK\conical Shaft\central Port\peripheral 2.3 mm Port
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Stopper\black PEEK\conical Shaft\central+peripheral 2.3 mm Port: for potentiometric O2k-MultiSensor applications (NO, H2S, H2O2); 1 additional port (2.3 mm); central titration port; conical bottom; including Volume-Calibration Ring (A or B); 2 mounted O-rings, with 8 spare O-rings (O-ring\Viton\12.5x1 mm).
Stopper\black PEEK\conical Shaft\central+2.3+2.6 mm Port
Stopper black PEEK conical Shaft central+2.3+2.6 mm Port.JPG
Stopper\black PEEK\conical Shaft\central+2.3+2.6 mm Port: for pH and reference electrode, central titration port and two additional ports (2.3 mm and 2.6 mm); conical bottom; including Volume-Calibration Ring (A or B), 2 mounted O-rings, with 8 spare O-rings (O-ring\Viton\12.5x1 mm).
Syringe Collars
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Syringe Collars (package of 20) for Hamilton microsyringes: for correctly storing the microsyringes in the Syringe Racks.
Syringe Labels
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Syringe Labels: set of labels with standard abbreviations (see O2k-Titrations).
Syringe Racks
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Syringe Racks: stainless steel; for proper placement of eight Hamilton microsyringes in HRR experiments; package of two (for a total of 16 microsyringes).
Syringe Storage Box
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Syringe Storage Box: for storing the Hamilton microsyringes; includes Syringe Labels.
Syringe\500 mm3 51/0.41 mm
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Hamilton Syringe\500 mm3 51/0.41 mm for manual titrations, 500 mm3 volume; fixed needle with rounded tip: 51 mm length, 0.41 mm inner diameter; for injections of suspensions of isolated mitochondria and filling of the Microsyringe\200 mm3\TIP2k.
Syringe\60 ml\Gas-Injection
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Syringe\60 mL\Gas-Injection, 60 mL, with spacer and stainless steel needle, flat tip, for gas injection into the O2k-chamber.
TIP2k Filter Papers
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TIP2k Filter Papers (package of 10) to be used for the stoppers during TIP2k titration for Instrumental oxygen background correction to avoid constant manual siphoning off of extruded liquid.
TIP2k-Module
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TIP2k-Module - Titration-Injection microPump (TIP2k) for two-channel operation with the O2k-FluoRespirometer with automatic control by DatLab of programmable titration regimes and feedback control (oxystat, pH-stat).
TIP2k-Needle Safety Support with cable guide
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TIP2k-Needle Safety Support with cable guide: for safe storage of TIP2k-needles and MultiSensor Modules cables when not required during the experiment.
TIP2k-Needle Spacer
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TIP2k-Needle Spacers for microinjection TIP2k needle, silicone stops (200/Pkg.) with mounting tool.
TestAbbrDescr
Titration-Injection microPump
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Titration-Injection microPump (TIP2k) for two-channel operation with the O2k with automatic control by DatLab of programmable titration regimes and feedback control (oxystat, pH-stat).
Tube Racks
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Tube Racks: stainless steel, accomodating four 50-ml tubes, for cleaning of microsyringes, cleaning and storage of stoppers during cleaning of the O2k-chambers; package of two (for a total of eight tubes).
USB-Cable 2.0\Type A-B
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USB-Cable 2.0\Type A-B for connecting the O2k-Main Unit (O2k-Series E upwards) to the USB port of a PC or laptop.
Uninterrupted power supplyUPSA back-up power supply may be required to secure uninterrupted power supply.
Vitonn.a.Viton® is a fluoroelastomer with excellent resistance to aggressive fuels and chemicals. Viton is resistant against oxygen diffusion which makes it an ideal material for high-resolution respirometry (Viton O-rings).
Volume-Calibration Ring
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Volume-Calibration Ring (A or B) PVDF for O2k-Stoppers (2-mL O2k-chamber), white; attached to the stoppers.
Volume-Calibration Ring sV
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Volume-Calibration Ring sV (A or B), white PVDF, attached to PEEK O2k-Stopper sV.