Arjay Engineering Ltd.

- Model 2852-OWI - Remote Mounted Oil/Water Interface Monitor



Reliable monitoring of oil/water interface and emulsions. The sensing probe continuously monitors the capacitance of the inserted probe. As the interface or emulsion layer (rag layer) crosses over the probe, a proportional 4-20 mA output is provided. Typical applications include oil water separators, oil/water knock-out tanks, treater trains and decanting tanks.

The 2852-OWI sensing probe monitors the capacitance field around the probe.

A calibration is performed against the an oil condition and a water condition. The active portion of the probe is fully submerged into the liquid and sized to your targeted range of interest. As the oil/water interface or emulsion crosses or envelopes the probe, the capacitance change is tracked and an output of 4-20 mA is provided.

  • no moving parts
  • remote electronics via standard twisted pair
  • explosion proof probe is standard
  • probe is available with Intrinsically Safe option for alternative HazLoc protection
  • high corrosion resistant Teflon and stainless steel wetted parts 
  • capacitance technology responds to all oil types
  • HF capacitance technology does not foul or require routine cleaning
  • easy calibration and control set-up
  • remote monitor mounts safely away from the process

  • 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 or 100-240 vac +/- 10%
  • Alarm Relay: 2 x 10 amp@240 vac, SPDT dry, discrete relays with differential control (2852-OWI only)
  • Analog Output: 4-20mA proportional output, non-isolated
  • Communication: Modbus RS-485
  • Certified: UL 61010-1, 2nd Edition
  • CAN/CSA-22.2 61010-1-4
  • IEC/EN 61010-1, 2nd Edition
  • IEC 61326-1
  • CE Declared
  • Enclosure: Type 4/IP 66 painted steel or Type 4X/IP 66 polycarbonate or SS
  • Optional: Light, buzzer, beacon (2852-LT only)
  • 2851-OWI: as above: no relays, isolated 4-20mA

  • Probe: -60˚C to +260˚C
  • PMC: -60˚C to +55˚C
  • Approval: CSA Div 1, Class 1, Groups C,D
  • ABSA-CRN #0F07450.2
  • Intrinsic Safety: CSA Intrinsically Safe when ordered with Approved Barrier in Control Unit
  • Div 1, Class I, Groups A,B,C,D;
  • Class II, Groups E,F,G; Class III, Encl.Type 4
  • Wetted Parts: 316SS and Teflon

Sensor materials are eligible for NACE MR-0175 Compliance

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