O2/CO2 Measurement

Oxy-Meter OSD 23

• range for liquids: from 0,01 to 19,99 mg/l
• range for gas: from 0,1 to 199,9 %
• ambient operating conditions: 0-50 °C
• Span and offset setup
• automatic temperature compensation
• button for selection of the unit mg/l or %
• 0-5 V output as (0-2 V or 4-20 mA as option)
• adapter 220 V / 9 V included
• dimensions: 106 x 187 x 54 mm
• to use with a Clark electrode (polarographic methode)

Oxy-Meter OXM200

• range: from 0 to 20 mg/l
• manual temperature correction
• IP65
• calibration with buttons
• options: threshold with led and relay, 4-20 mA output
• to use with a Clark electrode (polarographic methode)

Blind transmitter 4-20 mA (for O2)

• power supply through the 4-20 mA current loop
• calibration has to be made on the master
• IP65
• dimensions: 110 mm x 75 mm x 60 mm

Oxy-Meter SensoDirect Oxi200

• O2 partial pressure: 0.0 to 570.0 hPa, 0 to 1200 hPa, 0.0 to 427.5 mmHg, 0to 900 mmHg
• O2 concentration: 0.00 to 25.00 mg/L, 0.0 to 70.0 mg/L
• O2 saturation: 0.0 to 250.0 %, 0 to 600 %
• Accuracy: ± 1.5% ± 0.2 mg/L (0 to 25 mg/L) ± 2.5% ± 0.3 mg/L (25 to 70 mg/L) ±1Digit
• Temperature: -5.0 to + 50.0 °C 23.0 to 122.0 ° F
• Accuracy: ± 0.1 °C
• Abs. air pressure: 500 to 1100 hPa
• Accuracy: ± 0.5% full scale
• Nominal temperature: 25°C
• Operating temperature: 0 to +50°C
• Storage temperature: -20 to +70°C
• Power supply: 4 x 1.5 V battery type AA, operating time up to 12000 h
• Power consumption: max. 0.25 mA
• Automatic Off function: 0 - 120 minutes
• Electrode: Self-polarising oxygen electrode with integrated NTC sensor Connection: 7-pin DIN socket Installation diameter: 12.0 ± 0.2 mm Overall length: approx. 220 mm (incl. kink protection) Operating temperature: 0 to 40 °C
• Dimensions: 175 x 140 x 45 mm (L x W x H)

PreSens Sensor Spot, non invasiv O2 sensor

they are attached to the inner surface of any transparent vessel. Differents dyes are included in a matrix. A detector measures the modification of the fluorescence emmited from the dye depending on the O2 concentration.

for shake flask, tubes, petri dishes, cultivation bags, wine. O2 measurement without contact.

advantages

• non invasiv
• no sampling necessary
• precalibrated
• can be delivered sterilised by beta irradiation

specifications

• O2 range: 0 to 100 % with sensor type PSt3, 0 to 4.2 % with sensor type PSt6
• respons time: 6 to 40 s
• temperature range: 5 to 50 °C

reader Fibox LCD V7

• Portable fiber optic oxygen transmitter
• Stand-alone system
• For use with non-invasive oxygen sensors and sensor probes
• One calibration for a multitude of sensor spots
• Portable devvice with rechargeable battery
• Temperature compensated
• Controllable via integrated, programmable LCD control panel
• Connectable to a PC for measurement

catalog Presens

Micro O2-probe

sensor tip diameter smaller as 150 um

no need of reference electrode

different types

• needle type, optimal for penetration in tissues, septum rubber. After penetration, he sensor tip is extended for measurement
• implantable, only the fiber. As it is metal free, it can be used in NMR environnement

applications

• measurement of O2 in animal and plant tissues
• measurement in small volumes or small headspace of package

specifications

• O2 range: 0 to 50 % with sensor type PSt3, 0 to 3 % with sensor type TOS7
• respons time: 1 to 39 s
• temperature range: 5 to 50 °C

one channel Transmitter: Microx 4 or Microx 4 trace

O2 probe

The oxygen probe for in-line measurement (OIM) consists of a fitting made of stainless steel with an optical exchange cap (OEC). The in-line measurement is connected to the instrument via an optical fiber. It has a standardized thread and length and is compatible with most bioreactors and port adapters. In addition, customized fittings for e. g. sight glasses are offered

specifications

• O2 range: 0 to 100 % with sensor type PSt3, 0 to 4.2 % with sensor type PSt6
• respons time: 6 to 40 s
• temperature range: 5 to 50 °C
• can be sterilized at 130 °C, up to 100 times usable without calibration
• available in different sizes: 12 and 25 mm diameter
• easy exchangeable (only change the tip)
• no tile for polarization needed

one channel Transmitter: Fibox 3/Fibox 3 trace, Fibox 3 LCD/Fibox 3 LCD trace, Fibox 4, Fibox 4 trace

multi-channel Transmitter, for 4 or 10 probes: OXY-4/10 mini & OXY-4/10 trace.

O2 diping probe

The steel tube has an outer diameter of 4 mm and a length of 10 cm.

The diameter of the fiber itself is 2 mm.

Due to the use of a polymer optical fiber, this probe is not compatible to temperatures higher than 70°C.

one channel transmitters: Fibox 3/Fibox 3 trace, Fibox 3 LCD/Fibox 3 LCD trace, Fibox 4, Fibox 4 trace

multi-channel fiber optic oxygen transmitters / Parallel monitoring of up to 10: OXY-4/10 mini & OXY-4/10 trace.

application: this dipping probes for oxygen measurement does not consume oxygen. Due to their small dimensions they do not disturb the flow and mass-transport and consequently display the in-situ oxygen concentration. As minisensors from PreSens are long-term stable they can be implanted in soil for many years.

Optrode Dual ESC interface for oxgen and pH measurement

It converts the reading of chemical optical sensors to electrochemical signals (ECS).

Connected to the electrode input of conventional controllers it expands their functionality to work with chemical optical sensors. In addition 4 - 20 mA outputs are integrated. Pre-calibration data for the chemical optical sensors can easily be entered via barcode. Temperature is compensated by a pre-set temperature or via the integrated temperature sensor. The Optrode Dual can be connected to any oxygen sensor type PSt3, and pH sensors type HP5 and HP8.

It can replace for exemple a O2 probe in a fermenter.

pH Optrode

• type HP5 / HP8, output -321 to 321 mV
• range: pH 2 to 12

O2 Optrode

• type PSt3, output 60 nA at 25 °C (like Clark electrode)
• range: 0 to 100 % saturation

Temperature measurement: 0-50 °C (Sensor: 4-wire, PT100, Class A)

Can be used with Presens Sensor Spots O2 / pH, Flow-Through Cells O2 / pH, Oxygen Dipping Probe

see here for pH optrodes

Oxygen Probe OXYPro® with 4-20 mA output

The OXYPro® combine an optical sensor (type PSt7, PSt8, PSt6, PSt9) and electro-optical module in one probe. The sensors have a maximum measurement range of 0 - 20.9 % O2, 0-100 % O2, 0-10 % O2 ou 0-200 ppm % O2. They are integrated in a removable sensor cap (OEC), which can easily be exchanged. The mid-range OXYPro® are ideally suited for applications in the food & beverage sector, e. g. soft drink production or wineries. The exchange caps are not only available in a version safe for food applications, but also with fast response time, for measurements in aggressive environments, or for reduced air bubble formation on the sensor. The OXYPro® are directly connected to the control unit and have a standard PG 13.5 stainless steel thread for easy integration at the measurement site. As a digital interface these probes use RS485 (OXYPro® _R = PreSens proprietary, OXYPro® _RM = Modbus RTU) and have 4 - 20 mA analog output. A serial communication protocol is offered for data exchange between the OXYPro® and a PC or other host unit. For initial operation and adjustment of the 4 - 20 mA output the PreSens EOM-STS software can be used.

Oxygen Probe OXYBASE® with 4-20 mA output

The OXYBase® WR-RS485-AO combines an optical sensor type PSt3 and electro-optical module in one probe. The sensor has a maximum measurement range of 0 - 100 % O2, and a detection limit of 0.03 % O2 / 20 ppb. As it is waterproof, this probe is ideally suited for e. g. measurements in aquaculture or environmental research projects. OXYBase® is connected directly to the control unit, uses RS485 as digital interface (PreSens proprietary) and has 4 - 20 mA analog output. A serial communication protocol is offered for data exchange between the OXYBase® and a PC or other host unit. For initial operation and adjustment of the 4 - 20 mA output the PreSens EOM-STS software can be used. The probe is available with various cable lengths, and its sensor is integrated in a removable sensor cap (OEC), which can easily be exchanged. These exchange caps are offered in different versions for certain demands (fast response time, safe for food applications, for aggressive environments, USP Class VI compatible). The sensor is not autoclavable.

Oxygen measurement with OxoDish /SDR

detects O2 in multidishes non-invasively. These contain a sensor spot at the bottom of each well. They are read out non-invasively through the transparent bottom. It is available in the 24-well and 6-well format. It can be used in incubators and on shakers and is thus the ideal tool for cell cultivation.

The SDR reader can also be used with Deep Well OxoDishes and glass vials (5 mL).

The Deep Well OxoDishes are suitable for shaken cultures (bacterium, yeast, suspension cells, etc.) with a special adapter.

Oxygen measurement in vials

Online oxygen monitoring in 20 ml SensorVials

Special glass vials with integrated PSt3 oxygen sensor foil

Measurement in liquid phase and headspace

Vial Adapter for attaching of a polymer optical fiber (POF-2SMA)

SensorVials for stirred and non-stirred applications available

Pre-calibrated and autoclavable

Compatible with any PreSens oxygen transmitter, e.g. Fibox 3, OXY-4 mini, and others

Customer specific variation possible

SFR Shake Flask Reader

The SFR - Shake Flask Reader monitors oxygen and pH in up to 9 shake flasks simultaneously. It fits in nearly all standard shakers. The corresponding ready-to-use flasks contain pre-calibrated sensor spots. The system monitors non-invasively through the transparent bottom of the flask. Different types and sizes of flasks are available here. Plastic flasks contain pre-calibrated oxygen and pH sensors. They are ready-to-use for one cultivation. Glass flasks are equipped with autoclavable oxygen sesnors.

Oxygen Ingress Measurement

A new non-invasive and non-destructive fiber optic oxygen meter to determine oxygen permeability of plastic bottles and containers.

The sensor spot can be glued into the PET bottle which then can be closed with a standard closure. For this direct coating, the bottles should be transparent but the measurement is even possible through slightly coloured (e. g. greenish or yellowish) or turbid bottles.

To determine the oxygen ingress in dark brown or non-transparent PET bottles, a direct coating of the PET bottle wall with a sensor spot is not possible. To enable non-invasive oxygen ingress measurement also for deeply coloured and non-transparent containers PreSens has developed an oxygen-sensitive cap (OSC) which can be used as closure.

PreSens Sensor Spot, non invasiv CO2 sensor

they are attached to the inner surface of any transparent vessel. Differents dyes are included in a matrix. A detector measures the modification of the fluorescence emmited from the dye depending on the CO2 concentration.

for shake flask, tubes, petri dishes and cultivation bags. CO2 measurement without contact.

advantages

• non invasiv
• no sampling necessary
• precalibrated
• can be delivered sterilised by beta irradiation

specifications

• CO2 range: 0 to 25 % at atmospheric pressure, 10-250 hPa pCO2
• respons time: 3 min for change from 2 % to 5 %
• temperature range: 15 to 45 °C

PreSens Imaging Solutions VisiSens

Measure and Visualize Oxygen distributions in 2D

For measurement the sample surface is covered with the sensor film, which translates the oxygen or CO2 content into a light signal. The sensor response is recorded pixel by pixel with a digital camera. With VisiSens spatial and temporal changes of oxygen concentration can be monitored.

• Non-invasive mapping of metabolic activity using sensor foils
• Imaging of living samples
• Be able to influence experiment conditions during measurements
• Reliable addressing regions with low or high oxygen content
• More than 100.000 sensing points within one single image
• Resolution : 25 um
• Oxygen measurement range: 0-100 % of the saturation
• USB powered & portable
• Easy evaluation via image processing software
• Create your own movies: time-lapse oxygen imaging

Permeation Testing of High Barrier Materials

new system for testing materials on oxygen permeability

unlike the other systems with electrochemical and barometrical sensors, this system uses optical measurement (Fibox LCD Trace)

advantages

• highly sensitive PSt9 sensor
• very low detection detection limit (0.5 ppm in the gas phase)
• dynamic range of 0 to 1000 ppm in the gas phase

Flow-Through Cell O2

The flow-through oxygen minisensor (FTC) is a miniaturized chemical optical sensor integrated in a flow-through cell. It is connected to the transmitter by an optical fiber.

A glass tube with an inner diameter of 2 mm is coated with an optical oxygen sensor at its inner wall. The volume for liquid inside the FTC is about 100 (±10) microliter.

The different flow-through cells can be easily connected via Luer-Lock adapters to external tubings to the Fibox (Ref. FTC) or to the Microx transmitters (Ref. FTCH and FTCM).

Fibox 4 and Fibox 4 Trace for oxgen measurement

Easy calibration via barcode scan

Compensation of temperature, pressure and salinity

Energy management for long term measurements

Optional database supported software offers simultaneous control of multiple devices

The Fibox 4 works with sensor type PSt3 (detection limit 15 ppb dissolved oxygen, 0 - 100 % oxygen). With the Fibox 4 trace additionally trace and ultra low oxygen concentrations can be measured. It is compatible with sensors type PSt3, PSt6 (detection limit 1 ppb dissolved oxygen, 0 - 4.2 % oxygen), and PSt9 (detection limit 0.5 ppm, 0 - 200 ppm gaseous oxygen)

The optical oxygen meters are compatible with the existing PreSens sensor portfolio. All PreSens oxygen sensors will be delivered with a barcode. With the oxygen meters´ integrated barcode reader sensor identification and calibration can be realized by performing just one scan, and measurements can be started immediately. A new sensor management system has been implemented where data of up to 100 sensors can be stored. This ensures a fast work flow while conducting most precise oxygen measurements.

Microx 4 & Microx 4 Trace for oxgen measurement

For use with non-invasive sensors, probes & microsensors

Straightforward measurement due to unique sensor ID

Simple calibration via barcode scan

Compensation of temperature, pressure and salinity

Energy management for long term measurements

Optional database supported software offers simultaneous control of multiple devices

The oxygen meters are compatible with non-invasive sensors & probes (type PSt7-10, PSt8-10) and oxygen microsensors (type PSt7-02, PSt8-02). The sensors are available as sensor spots, for integration in vessels, dipping probes, flow-through cells, oxygen microsensors integrated in syringe canulas, for piercing container walls or tissue, or bare fiber microsensors, which can be used in customized applications. All sensors will be delivered with a barcode. With the oxygen meters´ integrated barcode reader sensor recognition and calibration can be done in just one scan. The implemented sensor management system allows storing data of up to 100 sensors.

OXY-1 SMA and OXY-1 SMA-Trace for oxygen measurement

This device works like the Fibox 4, but it needs to be connected to a computer to read the data.

Due to its small outer dimensions it can be set up almost anywhere. It is compatible with non-invasive sensors, dipping probes and flow-through cells of type PSt3 and PSt6 (depending on the version). The device has a temperature compensation (it is possible to connect ane xternal temperature sensor, or enter the temperature in the software interface), so most precise measurements in environments with changing temperature can be taken. This USB-powered oxygen meter is operated with the PreSens Measurement Studio 2 software (included), which enables simultaneous control of several devices, so measurement networks can be set up. With numerous features and additional pressure and salinity compensation, the software makes the OXY-1 SMA suitable for almost any application where precise oxygen measurements are needed.

• Measurement range: 0 - 100 % oxygen with PSt3 sensors (both models), 0-5 % oxygen with PSt6 (only version OXY-1 SMA trace)
• Compact system with small outer dimensions
• Light-weighed: only 128 g
• USB-powered
• Compensation of temperature, pressure and salinity
• For use with non-invasive sensors, dipping probes and flow-through cells
• Temperature sensor: Pt100 temperature connector (sensor not included)
• Temperature performance: from 0 °C to + 50 °C , resolution ± 0.1 °C, accuracy ± 1.0 °C
• Power supply: 5 VDC (USB-2.0-Mini-B, cable included)
• Temperature: operating / storage: from 0  °C to + 50 °C / from - 20 °C to + 70 °C
• Relative humidity: 0 % to 80 % (non-condensing)
• Digital Interface: USB interface cable to PC (cable included)

OXY-1 ST and OXY-1 ST-Trace for oxygen measurement

This device works like the Microx 4, but it needs to be connected to a computer to read the data.

This extremely small oxygen meter can be used with microsensors (200 µm fiber) in different designs, non-invasive sensors, dipping probes and flow-through cells (1 mm fiber). It is is compatible with sensor type PSt7 and PSt8 (depending on the version). It is operated with the PreSens Measurement Studio 2 software and offers temperature, pressure and salinity compensated measurements. The software has numerous features and allows to control several OXY-1 ST simultaneously. Powered via USB no extra cables or adapters are needed. This oxygen meter is the solution for most precise micro-invasive or non-invasive measurements.

• Measurement range: 0 - 100 % oxygen with PSt7 sensors (both models), 0-10 % oxygen with PSt8 sensors (only OXY-1 ST trace)
• Compact system with small outer dimensions
• Light-weighed: only 128 g
• USB-powered
• Compensation of temperature, pressure and salinity
• For use with non-invasive sensors, dipping probes and microsensors
• Temperature sensor: Pt100 temperature connector (sensor not included)
• Temperature performance: from 0 °C to + 50 °C , resolution ± 0.1 °C, accuracy ± 1.0 °C
• Power supply: 5 VDC (USB-2.0-Mini-B, cable included)
• Temperature: operating / storage: from 0  °C to + 50 °C / from - 20 °C to + 70 °C
• Relative humidity: 0 % to 80 % (non-condensing)
• Digital Interface: USB interface cable to PC (cable included)

CO2 measurement device in beer GMAs

The measuring device makes it possible to measure CO2 content in fermenting tanks, KEG casks and cylindro-conical fermenters (volume percentage or g/l). CO2 content is determined thanks to the measurement of the balance value of temperature and pressure after the mechanical fluttering of CO2 dissolved in beer. CO2 content is read on a nomogram, part of measuring device supply.

The operator fills a vessel by measured sample of beer (with the help of ball valves). Fluttering is made by shaking the device. After attaining a balance the operator can read the balance value of the pressure and the temperature. CO2 content can be read on the nomogram. You can modify the formula for the calculation of the CO2 content in specific drinks.

• Range of CO2 measurement: 2.0 to 7.8 g/l or in volume percentage 1 to 4 %.
• Range of temperature measurement: -3 to +30 °C or +32 to +86 °F
• Range of pressure measurement: 0 to 250 kPa, or in bar or psi or according to customer's demand from 0 to 1 MPa.
• Accuracy of CO2 content measurement: 0,2g/l or +/- 0,02% volume.
• Accuracy of temperature measurement: +/- 0,5 °C.
• Accuracy of pressure measurement: +/- 6 kPa.
• Dimensions: 345x210x110 mm (h x w x l).
• Weight: 1.8 kg

The device can be adapted to other beverage.

CO2 measurement device in beer GMA

The operator fills a vessel by measured sample of beer (with the help of ball valves). Fluttering is made thanks to the repeated depression of a button with arrestment placed on the top of device. After attaining a balance the operator can read the balance value of the pressure and the temperature. CO2 content can be read on the nomogram. You can modify the formula for the calculation of the CO2 content in specific drinks.

• Range of CO2 measurement: 2.0 to 7.8 g/l or in volume percentage 1 to 4 %.
• Range of temperature measurement: -3 to +30 °C or +32 to +86 °F
• Range of pressure measurement: 0 to 250 kPa, or in bar or psi or according to customer's demand from 0 to 1 MPa.
• Accuracy of CO2 content measurement: 0.2g/l or +/- 0.02% volume.
• Accuracy of temperature measurement: +/- 0.5 °C.
• Accuracy of pressure measurement: +/- 6 kPa.
• Dimensions: 345x210x110 mm (h x w x l).
• Weight: 1.8 kg.

The device can be adapted to other beverage.

CO2 measurement device in beer GMD

The device for determination of CO2 content is based on the Henry law principle. The CO2 content is determined with the help of measurement of balanced value of temperature and pressure after the mechanical fluttering of CO2 dissolved in beer. Preceding the measurement the operator puts the button to flutter the CO2 in a low position and connects the device with the help of the rubber hose to cylindro-conical fermenter tank or to the fermenting or to the supplied adapted head attached to the KEG cask. This head makes it possible to attain the necessary overpressure in a KEG cask thus securing the samples withdrawal. The operator with the help of the closing valves fills a carefully measured vessel with the measured beer sample. Fluttering is done with the help of depressing the arrestment button - that is placed on the top of the device. You switch on the device by depressing the "ON" button on the membrane keyboard. The value of the CO2 content can be watched on a display after depression of the "enter" button in CO2 menu. The device cleaning after the measurement is easy and fast.

• Range of CO2 measurement: 2 to 9.99 g/litre or in volume percentage 1 to 5.15 %.
• Range of temperature measurement: -3°C to +30°C or +26° to +86° F
• Range of pressure measurement: 0 - 600 kPa or in bars or psi or in version according to customer's demand 0 - 1 MPa.
• Accuracy of CO2 content measurement: 0.05 g/l or 0.01 % volume.
• Accuracy of temperature measurement: 0.1°C
• Accuracy of pressure measurement: 0.5 %.
• Digital display: 2- lines, 8- digits
• Memory: 400 samples of measurement (GMDK)
• Dimensions: 390x210x90 mm (h x w x l)
• Weight: 1.7 kg

Version GMDK: with USB connector and software for data transfer to a computer.

The device can be adapted to other beverage.

Carbotec TR-PT in-line CO2-transmitter

It measures continuously and exactly the content of carbon dioxide in carbonated liquids. For determining the CO2-content of a carbonated liquid, every 13 seconds a 30ml sample is isolated from the main stream. The pressure of this taken sample is abruptly reduced to below atmospheric pressure. The resultant pressure will differ from that of a non-carbonated liquid according to the volume of dissolved CO2 in the sampled liquid. This difference in resulting pressure is the basis for calculating the CO2-content of the liquid. The temperature dependence of the measurement signal is electronically compensated by PT100. After the measurement the sample is returned to the beverage line. The CO2-concentration can be displayed in different units like g/l, v/v, bar (20°C), ml/l, % or cc/kg.

• Measuring range 0 - 10 g/l CO2
• Accuracy 0.05 g/L
• Repeatability +/- 0.01 g/l CO2
• Response time < 20 sec
• Temperature compensation PT100
• Temperature range Medium -10°C to +100°C
• Pressure range max. 10 bar
• Output 3x digital (24 VDC) + 2x analog (4-20 mA)
• Enclosure rating IP 65
• Power Supply 24 VDC

Carbotec NIR in-line CO2-transmitter

It measures continuously and exactly the content of carbon dioxide in carbonated liquids. While transmitting a sapphire crystal, infrared light is reflected at the crystal surface which is in contact to the carbonated liquid. The CO2 molecules absorb the light and decrease the intensity. By intensity measurement, 'true' CO2 content is determined. CARBOTEC NIR can be used to detect carbon dioxide even when CO2 is not the only gas in the liquid. Without any moving parts in the sensor head, the new generation of CO2 sensors is virtually maintenance free.

• Measuring range 0 - 10 g/l CO2
• Accuracy 0.1 g/L
• Repeatability +/- 0.02 g/l CO2
• Response time < 3 sec
• Temperature compensation PT100
• Temperature range Medium -10°C to +90°C
• Pressure range max. 10 bar
• Output 3x digital (24 VDC) + 2x analog (4-20 mA)
• Enclosure rating IP 65
• Power Supply 24 VDC

OXYTRANS TR in-line O2-transmitter

this device is used in various industries all around the world. Breweries and soft drink manufacturers determine the O2 content in deaerated water and beverages with OXYTRANS. Oxygen measurement during fermentation is an ideal application. Numerous power plants use the sensor to monitor oxygen levels in their boiler water. The state of the art optical measurement technology is based on the effect of luminescence quenching, i.e. the radiationless redistribution of excitation energy via a molecular interaction. An indicator layer on a small glass component ('optical window') installed in the measuring head is illuminated with blue-green-light. When the indicator molecules absorb the incident light they are promoted to a higher energy state. After a certain time they convert back to their ground state during which a detectable red light is emitted. If O2 is present the energy is transferred from the indicator molecules to the oxygen. The detected signal decreases according to the oxygen content. OXYTRANS displays various units, e.g. ppb, ppm and % oxygen. The lightweight portable device is very robust and can easily be connected with hoses.

• Liquid Phase Measuring Range: 1 ppb to 2 ppm or 30 ppb to 50 ppm
• Liquid Phase Accuracy: ± 1 ppb or ± 30 ppb
• Gas Phase Measuring Range: 0 to 4.2 % O2 or 0 to 50 % O2
• Gas Phase Accuracy: ± 0,.002 % O2 or ± 0.03 % O2
• Response Time: t90 < 10 s
• Pressure of Operation: max. 12 bar
• Temperature of Operation: - 5 to + 55 °C (option: + 98 °C), resistance: max. + 130 °C
• Temperature Compensation: Pt100
• Material: 1.4404/AISI 316L, silicone (FDA), PTFE (FDA)
• Connections compatible to Varivent© Inline-Housings DN40 - DN150, DIN, ANS, others on request
• Input: 3 x digital (24 VDC)
• Output: 3 x digital (24 VDC) & 2 x analog (4 - 20 mA)
• Enclosure Rating: IP65
• Power Supply: 24 VDC

OXYTRANS M portable O2-Measurement

It is a portable, optical oxygen sensor for measurement of O2 in liquids and gases. A typical application is the oxygen measurement in boiler feed water and in protective atmospheres.

Electrolyte solutions are not necessary and no oxygen is consumed during the measurement. The optical measurement technology is based on the effect of luminescence quenching, i. e. the radiationless redistribution of excitation energy via molecular interaction. In the measuring head a small glass component with a thin layer of indicator molecules is installed, the optical window. The indicator molecules are illuminated with blue-green light produced by an LED in the oxygen sensor. They absorb the incident light and are promoted to a higher energy state. After a certain time the molecules convert back to their ground state, during which red light is emitted. The red light is detected inside in the sensor. If O2 molecules are present the energy is transferred from the excited indicator molecules to the oxygen. This molecular interaction causes the excitation energy to be redistributed without any resultant radiation. The detected signal decreases with increasing concentration of oxygen molecules in the product. Any temperature drifts of the measured signal are automatically compensated for by an internal Pt100 sensor.

• Liquid Phase Measuring Range: 1 ppb to 2 ppm or 30 ppb to 50 ppm
• Liquid Phase Accuracy: ± 1 ppb or ± 30 ppb
• Gas Phase Measuring Range: 0 to 4.2 % O2 or 0 to 50 % O2
• Gas Phase Accuracy: ± 0,.002 % O2 or ± 0.03 % O2
• Response Time: t90 < 10 s
• Pressure of Operation: max. 12 bar
• Temperature of Operation: - 5 to + 55 °C (option: + 98 °C), resistance: max. + 130 °C
• Temperature compensation: Pt100
• Material: 1.4404/AISI 316L, silicone (FDA), PTFE (FDA)
• Connections: hoses of 6 mm diameter
• Datalogging: manual and automatic with a logging time of 5 to 600 seconds; approx. 5.000 measurement values; PC software and USB-interface
• Enclosure Rating: IP65
• Power Supply: battery, rechargeable
• Weight: 1.65 kg