2852-IFA Remote Mounted Interface Alarm

2852-IFA Remote Mounted Interface Alarm


The 2852-IFA provides reliable interface monitoring for alarm between two liquids. The sensing probe continuously monitors the liquid in a vessel and will alarm when the interface of a different dielectric liquid crosses the active probe.

The 2852-IFA sensing probe monitors the capacitance field around the probe. The probe is calibrated to one of the liquids. As the interface of the second product crosses over the probe, the probe capacitance changes. This change is used to activate the relays for alarm and control.

Typical applications include oil/water interface in pipes and separators, water accumulation in fuel tank bottoms, and product phase changes in process piping streams.

Features and Benefits

  • 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 liquid types
  • HF capacitance technology does not require routine cleaning
  • Easy calibration and control set-up
  • Capacitance technology does not foul or require cleaning
  • Remote alarm unit mounts away from the process for safety and ease of control wiring

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 or 100-240 vac +/- 10%
Alarm Relay 2 x 10 amp@240 vac, SPDT, dry
Analog Output 4 mA normal/20 mA alarm
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


Probe -60˚C to +260˚C
PMC -60˚C to +55˚C
Approval CSA Div 1, Class 1, Groups C,D
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





Sample Specification

Product Image