2880-OWI Probe Mounted Oil Water Interface Transmitter

2880-OWI Probe Mounted Oil Water Interface Transmitter


The 2880-OWI Oil Water Interface Transmitter provides reliable monitoring of oil/water interface and emulsions. The 2880-OWI 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 2880-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.

Hazardous Location Use

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

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

The electronics for this model can also be mounted remote from the probe. Refer to the Model 2852-OWI. The probe becomes Intrinsically Safe when ordered with an IS Barrier installed in 2852-OWI 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 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

Technical Specifications

Control Unit

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
2880-OWI 0/4-20 mA non-isolated output
2881-OWI 0/4-20 mA isolated output
2882-OWI 0/4-20 mA non-isolated output and 2 x 10amp@240 vac, SPDT, dry relays

Viewing window of % Level LCD


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

Application Briefs

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