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Measure Ultra-Low Oxygen Amounts in Gases

Ultra-Trace Oxygen Probe OXYPro® UT & UTM
(0 - 200 ppmv O2)

The OXYPro® UT & UTM combine an optical sensor type PSt9 and electro-optical module in one probe. The sensor has a maximum measurement range of 0 - 200 ppmv O2, and a detection limit of 0.5 ppmv O2. It is for gaseous oxygen measurement only and ideally suited for monitoring oxygen sensitive processes, inertization, or other industrial applications. The sensor is integrated in a removable sensor cap (OEC), which can easily be exchanged. 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® UT = PreSens proprietary, OXYPro® UTM = 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.

  • Maximum measurement range of 0 - 200 ppmv O2, detection limit 0.5 ppmv O2
  • Ideal for monitoring O2 sensitive industrial applications
  • Simple integration due to standard PG 13.5 thread
  • Communication via RS485 (PreSesn proprietary, Modbus RTU)
  • 4 - 20 mA analog output

Applications

Monitoring Industrial Processes

The OXYPro® series probes are designed for harsh conditions like high pressure or oil/water mixtures. Additionally they are almost maintenance-free as they do not contain any membranes and electrolytes, so they are ideally suited for monitoring chemical industrial processes or oxygen sensitive applications. They can be used for gaseous or dissolved oxygen monitoring in most different environments, like e. g. gas pipelines or tanks.


Technical

Specifications
*at 20 °C, 960 - 980 hPa; humidified gas mixture
**determined changing from 20.9 % oxygen gas to nitrogen 5.0
Measurement range*0 - 200 ppmv O2
Limit of detection*0.5 ppmv O2
Resolution*1 ± 0.15 ppmv O2, 100 ± 0.8 ppmv O2, 200 ± 1.5 ppmv O2
Response time (t90)**< 10 sec.
Properties
CompatibilityGas phase only!
Cross-sensitivity toOrganic solvents, such as pure acetone, toluene, chloroform or methylene chloride
Chlorine gas
Storage stability of sensor cap5 years provided the sensor material is stored at room temperature in dry conditions and in the dark
Sampling rate1 sec. up to 9 min. 59 sec.
Temperature sensorNTC
Temperature performanceAccuracy < ± 1 °C
Power supply7 - 30 V
Power consumption in active modeMax. 1 W
Power consumption in stand-by mode0.15 W
Temperature range operationOptimal: 0 °C to + 50 °C
Max.: - 20 °C to + 60 °C
Temperature range storageOptimal: room temprature (+ 20 °C ± 5  °C)
Max.: 0 °C to + 70 °C
Pressure resistance10 mbar up to 12 bar
DimensionsMax. immersion depth: 120 mm / 225 mm / 325 mm / 425 mm
PG 13.5 thread and VP8 connector: 55 mm
Diameter: 12 mm
Probe housing materialStainless steel 1.4435
Surface quality of steelRa < 0.4 μm (N5)
Wetted partStainless steel 1.4435, silicone, EPDM
Weight100 g
Digital interfaceRS485, half-duplex (variable Baud rate, default: 19200, data bits: 8, parity: none, stop bits: 1, handshake: none) or
RS485 Modbus RTU
Analog output4 - 20 mA

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