NH3/Oil switch

Technical data: HBLS

HBLS is a level switch for detecting NH3 refrigerant and oil in industrial refrigeration systems. Typically it is installed on fluid tanks, also suitable for mounting other places where you need level indication of both NH3 refrigerant and oil.

The sensor is specially built to resist high pressure and low temperatures.


Product features

  Proven sensor technology for simple transsistor output PNP/NPN and NO/NC contact function 
Designed for the industrial refrigeration industry - max pressure 100 bar
Clear indication with LED when refrigerant/oil is detected 
Split design which makes it easy to install and make diagnostic on. The electronic part can be easily disconnected by 2 screws.


Connection diagram

HBLC web 1


HBLS dimensioner

Power supply
Voltage24 V DC + 10%
Max current condumption30 mA
Cable includedCabel - 4 wire - 5 m
Plug connectionM12, 4 pins - DIN 0627
Output typePNP, 1 A
Contact functionNC or NO
Environmental conditions
Ambient temperature-30...+50°C
Refrigerant teperature-60...+80°C
Max pressure  100 bar
Protection degree  IP65
Vibrations  IEC 68-2-6 (4g)
Mechanical specifications
Thread connection3/4”  
Material - liquid partsAISI 304 / PTFE
Material - electronics partsNylon 6 (PA)
Dimensions228 x 72 x 51 mm
Weight600 g
House designFront
EMCEN 61000-2
5 m cable w. M12 plug HBxC-M12/5
Cable specifikation 4 x 0,34 mm2 
LED indicationRed, yellow & green

Ordering code

OutputThread typeOrdering code
NC3/4" NPTHBLS-NC-1.3-2
NO3/4" NPTHBLS-NO-1.3-2
NC  3/4" BSPPHBLS-NC-1.3-6
NO3/4" BSPPHBLS-NO-1.3-6