Residual oil content measurement OILCHECK according to ISO 8573 – stationary solution

The OIL check residual oil content sensor measures the vaporized residual oil content in compressed air. By extracting a representative partial volume flow from the compressed air for sampling, the OIL check provides constant monitoring. Immediate detection of threshold value exceedances enables quick initiation of corrective actions, ensuring oil-free compressed air.

As a stationary solution in combination with the DS 400, the OIL-Check 400 measures the vaporized residual oil content from 0.001 to 2.5 mg/m³, within a pressure range of 3 to 16 bar. It employs a highly precise PID sensor and an integrated mini catalyst for zero-point calibration.

 

Key features include:

  • Long-term, high-precision residual oil measurement (oil vapor) using a PID sensor (photo-ionic-detector)
  • Stable measurement results over time due to automatic zero-point calibration. The integrated mini catalyst reliably generates a defined reference gas for zero-point calibration
  • Unlike systems that generate “zero air” or reference gas through activated carbon filters, and are thus subject to aging and saturation of the activated carbon filters, the mini catalyst produces “zero air” without aging or wear. Therefore, there is no need to change activated carbon filters
  • Easy sampling via PTFE hose or stainless-steel pipe

 

TECHNICAL DATA OIL-CHECK 400

Measured medium: Compressed air, 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: +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 pressure: By means of integrated pressure reducer with display
Humidity of measured gas: <= 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: integrated
Dimensions (mm): 410 x 440 x 163 (W x H x D)
Weight: approx. 16.3 kg

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