CS Instruments Residual Oil Content Measurement OILCHECK According To ISO 8573 - Stationary Solution

The residual oil content sensor OIL check measures the vaporous residual oil content in the compressed air. By means of a sample taking a representative part volume flow is taken from the compressed air and led to the OIL check. Due to the continuous measurement threshold value exceeding will be recognized immediately and remedial actions can be initiated to ensure oil-free compressed air.


  • Permanent, highly precise residual oil measurement (oil
    vapour) with PID sensor (photo-ionic-detector)
  • Ideal for mobile measurement: The PID sensor is ready for
    measurement within about 30 minutes
  • Measuring results with long-term stability due to automatic
    zero point calibration. The integrated mini catalyst reliably
    generates a defi ned reference gas for zero point calibration
  • In contrast to measuring systems which generate the “zero
    air” or reference gas by means of active carbon fi lters and
    which are therefore dependent on the ageing and saturation
    of the active carbon fi lters, the mini catalyst generates the
    “zero air” without ageing or wear. There is no change of
    active carbon fi lters necessary
  • Easy sampling via PTFE hose or stainless steel pipe


  • Measuring compressed air quality


  • Measured medium: Compressed air, free from aggressive, corrosive,
    acid, toxic, fl ammable 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
  • Identifi able substances: Hydrocarbons, functional hydrocarbons, aromatic
  • Field of application: After activated carbon fi lter, after activated carbon
    adsorber, after oil-free compressor, always with connected upstream fi ltration and dryer
  • Ambient temperature: +5 °C… +45 °C, rel. humidity <= 75% without condensation
  • Pressure dew point: max. +10 °Ctd.
  • Compressed air temp.: +5 °C… +50 °C
  • Operational overpressure:
    3…16 bar [ü] optional pressure reducer connected
    upstream for up to 300 bar [ü]
  • Setting operational
    By means of integrated pressure reducer with display
  • Humidity of measured
    <= 40% rel. humidity, pressure dew point max.
    +10 °C, non-condensable humidity
  • Compressed air connection:
    G 1/8″ female thread according to ISO 228-1
  • Measured values: mg/norm m³, pressure and temperature compensated
    residual oil vapour content
  • Measuring range: 0.001 … 2.5 mg/m³
  • Detection limit
    (residual oil):
    0.001 mg/m³
  • Flow of measuring gas: approx. 1.20 norm litres/minute, relative to 1.0 bar
    [abs] and + 20 °C, in a relaxed state
  • Reference gas generation:
    By means of integrated mini catalyst
  • Power supply: 100…240 VAC / 1 Ph. / PE / 50…60 Hz / ± 10%
  • Outputs: Ethernet interface (Modbus/TCP), RS 485 interface
    (Modbus-RTU), 2 alarm relays (change 230 VAC 3A),
    4…20 mA (on request)
  • Operating hours counter:
  • Dimensions (mm): 410 x 440 x 163 (W x H x D)
  • Weight: approx. 16.3 kg


Datasheet : CS Instruments Residual Oil Content Measurement OILCHECK According To ISO 8573 – Stationary Solution

Shopping Cart