2852-FCM Remote Mounted Foam Control Monitor

2852-FCM Remote Mounted Foam Control Monitor


The 2852-FCM provides reliable monitoring of foaming conditions in process applications. The sensing probe is tuned to the normal operating conditions of the gaseous or air phase in your process. The intrusion of foam around the probe will cause a capacitance change that is monitored by the remote controller. Variations in foam levels will result in a proportional output.

The 2852-FCM sensing probe monitors the capacitance field around the probe within a shield, tank or pipe. As the dielectric characteristics of a fluid or solid change, the resulting capacitance change is monitored and configured into a useable signal for process control and recording. A display is available in user configured engineering units.

Product dielectric changes in your application may not be strictly linear. The 2852-FCM is ideal for general monitoring and trending of process conditions.

Typical applications include free water knock-out (FWKO) systems, gas phase separation, pre-compressor main-fold protection, and wastewater treatment facilities. The unique Arjay pulse module circuit makes this unit ideal for foam suppression, interface and control.

Features & Benefits

  • No moving parts
  • Remote electronics via standard twisted pair
  • All set-up, calibration and diagnostics are accessed at the control panel
  • All control wiring and interface is done at the control panel
  • HF capacitance technology does not require routine cleaning
  • Easy set-up and user interface
  • Electronics remote from process
  • High corrosion resistant Teflon and 316SS parts
  • Easy calibration and control setup

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 tank view graphics,
% and engineering units
trend line selectable hours, days or none
Relay Outputs four SPDT, 10 amp @ 240 vac, dry
Enclosure Type 4 metal painted blue / IP 66
optional Type 4X SS or polycarbonate
Approvals to UL / CSA / CE
IEC 61010


Process Temp. -60˚C to +260˚C
Ambient Temp. -60˚C to +55˚C
Pressure 103 bar/10342 kPA/1500psi
at stable temperature
Process Connection available threaded or flanged
Explosion Proof CSA Div 1, Class 1, Groups C,D
Intrinsic Safety Approved Intrinsically Safe when ordered with Approved Barrier in Control Unit
CAN/CSA E60079-11:
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