NH3 Compressor Protection

Technical data: HBCP

HBCP is a variant of the HBX vapor quality sensor used at the compressor inlet. HBCP can provide an alarm, when the liquid content in the gas exceeds the critical set point or simply provides an analog signal to a PLC. The sensor can prevent liquid refrigerant from entering the compressor, causing damage to the moving parts. The sensor has a high sensitivity and detects even small liquid droplets before they become critical to the compressor. The sensor has a uniquely short reaction time which can be used for emergency stop of the compressor, but typically the signal can be used as an early warning or as a part of the evaporator control.

Product features

The sensor protects the compressor against damage in the event of liquid hammer from the system.
Setting up the sensor using a PC allows for adjustments to match the system and the compressor.
Instantaneous reaction without delays.




Connection diagram

 HBLC web 1




HBCP-Rod style

Power supply
Voltage24 V AC/DC + 10%
Current consumption - sensor only*600 mA
Plug connectionM12, 5 pins - DIM 0627
Output typePNP-1 A
Output functionNC or NO
Environmental conditions
Ambient temperature-30°C...+50°C
Refrigerant temperature-60°C...+40°C
Max. pressure100 bar
Waterproof ratingIP65
VibrationsIEC 68-2-6 (4g) 
Mechanical specifications
Thread connection3/4” & 1" NPT / BSPP 
Material - mechanical partsAISI 304 / PTEE
Material - electronic partsNylon 6 (PA)
DimensionsSee drawing 
CEEN 61000-2
Cable size 5 m - 3 x0.25 mm2 
Cable glands PG7 / M8
Cable resistance500 Ohm/Km   
LED IndicationGreen, yellow, and red
Type of configurationWith the HB Tool
Tool to be usedHBCP or HBX software
* Total consumption is sensor consumption plus output and it depends on ambient temperature.

Ordering code

Pipe size (compressor line)LengthConnectionOrdering code
2"150 mm3/4" NPTHBCP-1.5-2
2"150 mm3/4" BSPPHBCP-1.5-6
> 2"300 mm3/4" NPTHBCP-3-2
> 2"300 mm3/4" BSPPHBCP-3-6
> 2"300 mm1" BSPPHBCP-3-8
> 2"300 mm1" NPTHBCP-3-9
Electronic PartMust be calibrated on-site HBCP-EL


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