2882-OWS Probe Mounted Oil Alarm

2882-OWS Probe Mounted Oil Alarm


The 2882-OWS Probe Mounted Oil Alarm provides reliable monitoring for the oil/water interface in separators. The probe, once designed, is inserted into the separator or sump to the depth of desired oil accumulation. The electronics is calibrated to the capacitance field around the probe. As oil accumulates and effectively displaces the water, the capacitance change around the probe tip is monitored to activate the relays.

Adjustable time delay and sensitivity adjustment is standard to suppress spurious alarms from intermittent turbulence and wash-down.

Hazardous Location Use

Available Component Certifications may be suitable to your application. Consult Arjay for assistance.

  • 2880 Electrical Safety
  • UL, CSA, or IEC 61010
  • Class 1, Group B,C,D;
  • Class II, Group E,F,G
  • CSA Class 1, Group C,D

The electronics for this model can also be mounted remote from the probe. Refer to the Model 2852-OWS. The probe becomes Intrinsically Safe when ordered with an IS Barrier installed in 2852-OWS control panel: CSA Div 1, Class 1, Groups A,B,C,D

Features & Benefits

  • No moving parts
  • Electronics is integral to the probe
  • High corrosion resistant Teflon,stainless steel wetted and 316SS parts
  • Capacitance technology responds to all oil types
  • HF capacitance technology does not require routine cleaning
  • Easy calibration and control set-up

Technical Specifications


Operating Temp. -20˚C to +55˚C
Resolution .007% (.07 pF at 1,000 pF)
Accuracy .04% of full scale pF
Power Input 12 vdc or 24 vdc, 0.1 amp max.
100-240 vac +/- 10%
Communication RS-485 Modbus
Control Interface 2 x 10amp@240 vac, SPDT, dry relays plus 4mA Normal / 20 mA alarm output


Process Temp. -60°C to +260°C (Teflon probe)
Pressure 103 bar/10342 kPA/1500psi at stable temperature
Wetted Parts 316SS and Teflon

Probe materials are eligible for NACE MR-0175 Compliance





Sample Specifications

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