2852-LS Two Point Level Switch


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 and solid types
  • HF capacitance technology does not require routine cleaning
  • easy calibration and control set-up
  • two discrete relay setpoints on one probe, each with 100% differential control
  • capacitance technology does not foul or require routine cleaning
  • remote monitor mounts away from the process for operator safety and ease of control wiring.
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Reliable level alarm and control of liquids and solids

The sensing probe continuously monitors the level changes in a vessel to alarm at user defined setpoints. It is typically used to control pumps and valves, alarm of high or low product conditions, or alert to potential overflow and dry conditions.

The 2852-LS sensing probe monitors the capacitance field around the probe. As the level of product increases or decreases in the vessel, the probe capacitance changes. This change is used to activate the relays for alarm and control.

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,
discrete relays with differential control
Analog Output 4 mA normal/20 mA alarm pegged to Relay 1 high differential setpoint
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

Technical Specifications - Probe

Probe -60˚C to +260˚C
PMC -60˚C to +55˚C
Pressure 103 bar/10342 kPA/1500psi at stable temp
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
CRN ABSA-CRN #OF07450.2
Wetted Parts 316SS and Teflon

Probe materials are eligible for NACE MR-0175 Compliance

Documentation

Brochure
Manual
Dimensional and Electrical Drawing
Sample written specification
Level Application Form

Related Papers from our library

What is Capacitance?

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