Continuous Precision
Accurate & stable measurement
The Oil Check Pro ensures highly precise, real-time monitoring of residual oil vapour in compressed air, with auto calibration for long-term accuracy.
Easy Maintenance
Service-friendly & no downtime
The sensor unit can be replaced on-site, and calibration is quick and simple using test gas cylinders, keeping operations running smoothly.
Versatile Applications
Stationary & mobile solutions
Available as a fixed installation for continuous monitoring or as a portable device for on-the-go spot-checks, adapting to different needs.
General specifications
Technical specifications Oil Check Pro |
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Measured medium |
Compressed air, nitrogen, (free from aggressive, corrosive, acid, toxic, flammable and oxidising components). |
Measuring unit |
Residual oil content in mg oil/norm m³ relative to 1.0 bar [abs], +20 °C, 0% relative humidity, in accordance with ISO 8573-1 |
Identifiable substances |
Hydrocarbons, functional hydrocarbons, aromatic hydrocarbons |
Field of application |
After activated carbon filter, after activated carbon adsorber, after oil-free compressor, always with connected upstream filtration and dryer |
Ambient temperature |
+20 °C… +45 °C, rel. humidity <= 75% without condensation |
Compressed air temperature |
+20 °C… +50 °C |
Operational overpressure |
3…9 bar [ü] optional pressure reducer connected upstream for up to 300 bar |
Humidity of measured gas |
<= 40% rel. humidity, pressure dew point max. +10 °C, non-condensable humidity |
Compressed air connection |
G 1/4" female thread according to ISO 228-1 |
Measured values |
mg/norm m³, pressure and temperature compensated residual oil vapour content |
Measuring range |
0.001 … 5 mg/m³ (higher measuring ranges on request) |
Detection limit (residual oil) |
0.001 mg/m³ |
Flow of measuring gas |
approx. 0.5 norm litres/minute, relative to 1.0 bar [abs] and + 20 °C, (atmospheric conditions) |
Plug-in power supply |
100…240 VAC / 1 Ph. / PE / 50…60 Hz / ± 10% |
Outputs |
Digital output: RS 485 interface (Modbus RTU), Ethernet via DS 400 / 500 |
Operating hours counter |
integrated |
Dimensions (mm) |
200 x 130 x 120 (W x H x D) |
Weight (kg) |
approx. 7 kg |
- Forced pressure variation for long-term stable measurement results – Auto calibration
- Service friendly – no downtime – sensor unit can be replaced by user onsite
- Process safety – all functions are monitored internally.
- Onsite calibration – calibration can be carried out in the field using test gas cylinders.
- Ideal for mobile measurement – easy sampling and quickly ready for measurement