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Useful info

NH3 Liquid Level Switch

Technical data: HBSR

The HBSR is a Level Switch designed for detecting ammonia and brine refrigerants, ideal for industrial applications where high pressure and low temperatures are common. It is typically installed in refrigerant vessels, pump separators, or heat exchangers.


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Product features

  • Low-temperature operation: Specifically built to function in low temperatures, with two versions to accommodate different applications:
    • One type with a liquid temperature range of -40 to 50°C (-40°F to 122°F) for refrigeration systems.
    • A second type for heat pumps with a liquid temperature range of 50 to 80°C (122°F to 176°F).
  • Pressure tolerance: Rated for pressures up to 100 bar (1450 psi).
  • Power supply: The switch operates on a 24V AC/DC power supply.
  • Split design: Simplifies installation and diagnostics; electronic parts can be removed with two screws.
  • LED indicators: Provides clear visual feedback when refrigerant is detected.

Applications

  

HBSR tank

Specifications

Connection diagram

diagram connection switch HB Products NPN/PNP 

 

Drawing

HBSR

Power supply
Voltage24 V AC/DC + 10%
Current consumption< 200 mA
Max. current outputMax 50 mA
Plug connectionISO4400/DIN 43650 - 4 pins
Output
Transistor outputPNP or NPN
Contact functionNC or NO
Environmental conditions
Ambient temperature-30...+50°C
Refrigerant temperature-40..+50°C/+50..+80°C (Std./Heat Pump Version)
Max pressure100 bar
Protection degreeIP54 *
VibrationsIEC 60068-2-6 (4g)
Mechanical specifications
Thread connection3/4”
Material - liquid partsAISI 304 / PTFE
Material- electronic partsNylon 6 (PA)
Dimensions210x52x40
Weight470 g
House designFront
Approvals
EMC testEN 61000-2
*For outdoor and low temperature application use low temperature type with built-in heater

Ordering code

OutputThread typeOrdering code
PNP / NO1/2" NPTHBSR-PNP/NO-1
PNP / NC1/2" NPTHBSR-PNP/NC-1
PNP / NO3/4" NPTHBSR-PNP/NO-2
PNP / NC3/4" NPTHBSR-PNP/NC-2
PNP / NO3/4" BSPTHBSR-PNP/NO-4
PNP / NC3/4" BSPTHBSR-PNP/NC-4
PNP / NO1/2" BSPPHBSR-PNP/NO-5
PNP / NC1/2" BSPPHBSR-PNP/NC-5
PNP / NC1/2" BSPPHBSR/WITT-PNP/NC-5
PNP / NO3/4" BSPPHBSR-PNP/NO-6
PNP / NC3/4" BSPPHBSR-PNP/NC-6
NPN / NO1/2" NPTHBSR-NPN/NO-1
NPN / NC1/2" NPTHBSR-NPN/NC-1
NPN / NO3/4" NPTHBSR-NPN/NO-2
NPN / NC3/4" NPTHBSR-NPN/NC-2
NPN / NO3/4" BSPTHBSR-NPN/NO-4
NPN / NC3/4" BSPTHBSR-NPN/NC-4
NPN / NO1/2" BSPPHBSR-NPN/NO-5
NPN / NC1/2" BSPPHBSR-NPN/NC-5
NPN / NO3/4" BSPPHBSR-NPN/NO-6
NPN / NC3/4" BSPPHBSR-NPN/NC-6
Spare parts for HBSR
Electronic part for HBSR-PNP/NO HBSR-EL/PNP/NO
Electronic part for HBSR-PNP/NC HBSR-EL/PNP/NC
Electronic part for HBSR-NPN/NO HBSR-EL/NPN/NO
Electronic part for HBSR-NPN/NC HBSR-EL/NPN/NC

Downloads

Quick guide - HBSR

Instruction manual (UK) - HBSR

Drawing (STEP file) - HBSR

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