4100-OWM Water in Oil Monitor

4100-OWM Water in Oil Monitor


Continuous monitoring for % concentration of water in oil emulsions

The 4100-OWM Water in Oil Monitor is used for monitoring as the water phase changes to oil in a tank or pipe. A probe inserted into a tank or pipe measures the capacitance field. This is ideal for general monitoring of oils and other liquid phase changes in a process.

The 4100-OWM sensing probe monitors the capacitance field around the probe within a concentric shield, tank or pipe.

The emulsion characteristics of water to oil is not strictly linear and the Arjay controller allows for a 5 point calibration to enhance accuracy over an extended range. This instrument is ideal for general monitoring and trending of process conditions.

Optional Interfaces

  • Analog Output 4-20 mA non-isolated
  • Communication RS-485 Modbus

Features and Benefits

  • No moving parts
  • Remote electronics via standard twisted pair
  • All set-up, calibration and diagnostics are accessed at the control panel
  • Multi-point calibration curve
  • All control wiring and interface is done at the control panel
  • HF capacitance technology does not require routine cleaning
  • Touch screen interface for easy set-up and user interface
  • Trend display of hour, day or month increments
  • Unique capacitance approach eliminates routine cleaning
  • Control and interface panel mounts safely away from the process
  • Tank or pipe installation

Technical Specifications

Control Unit

Operating Temp. 0˚C to +55˚C
Resolution .007% (.07 pF at 1,000 pF)
Accuracy .04% of full scale pF
Power Input 24 vdc or 80-240 vac +/-10%, 1P, 50-60 HZ
Display touch screen full colour sump view graphics,
% and engineering units of oil
selectable trend line view or none
Relay Outputs four SPDT, 10 amp @ 240 vac, dry Pump relay has a discrete run time with level re-set
Enclosure Type 4 metal painted blue / IP 66
optional Type 4X SS or polycarbonate
Approvals to UL / CSA / CE
IEC 61010


Probe -60˚C to +260˚C
PMC -60˚C to +55˚C
Approval CSA Div 1, Class 1, Groups C,D
(also available I.S. with an Intrinsic Safety Barrier at the Contol unit)
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

Probe materials are eligible for NACE MR-0175 Compliance






Product Details

-OWM Water in Oil Monitor