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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.

Key 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 24 V 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.


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Product features

Proven sensor technology for simple transsistor output PNP/NPN and NO/NC contact function. The NO/NC term refers to the state of the contact in "dry" condition, when not influenced by the liquid.
Designed for the industrial industry - max pressure 100 bar.
Clear indication with LED when refrigerant is detected.
Split design which makes it easy to install and make diagnostic on. 

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
Level Switch for Refrigeration Systems:
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
Level Switch for Heat Pumps:
PNP / NO1/2" NPTHBSR-HP-PNP/NO-1
PNP / NC1/2" NPTHBSR-HP-PNP/NC-1
PNP / NO3/4" NPTHBSR-HP-PNP/NO-2
PNP / NC3/4" NPTHBSR-HP-PNP/NC-2
PNP / NO3/4" BSPTHBSR-HP-PNP/NO-4
PNP / NC3/4" BSPTHBSR-HP-PNP/NC-4
PNP / NO1/2" BSPPHBSR-HP-PNP/NO-5
PNP / NC1/2" BSPPHBSR-HP-PNP/NC-5
PNP / NO3/4" BSPPHBSR-HP-PNP/NO-6
PNP / NC3/4" BSPPHBSR-HP- PNP/NC-6
NPN / NO1/2" NPTHBSR-HP-NPN/NO-1
NPN / NC1/2" NPTHBSR-HP-NPN/NC-1
NPN / NO3/4" NPTHBSR-HP-NPN/NO-2
NPN / NC3/4" NPTHBSR-HP-NPN/NC-2
NPN / NO3/4" BSPTHBSR-HP-NPN/NO-4
NPN / NC3/4" BSPTHBSR-HP-NPN/NC-4
NPN / NO1/2" BSPPHBSR-HP-NPN/NO-5
NPN / NC1/2" BSPPHBSR-HP-NPN/NC-5
NPN / NO3/4" BSPPHBSR-HP-NPN/NO-6
NPN / NC3/4" BSPPHBSR-HP-NPN/NC-6
Spare parts for HBSR-HP
Electronic part for HBSR-HP-PNP/NO HBSR-HP-EL/PNP/NO
Electronic part for HBSR-HP-PNP/NC HBSR-HP-EL/PNP/NC
Electronic part for HBSR-HP-NPN/NO HBSR-HP-EL/NPN/NO
Electronic part for HBSR-HP-NPN/NC HBSR-HP-EL/NPN/NC

Downloads

Quick guide - HBSR

Instruction manual (UK) - HBSR

Drawing (STEP file) - HBSR

Choose the correct level switch for the application

 

 

 

 

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