HFC Refrigerant Level Sensor (Flex)

Technical data: HBLT-Flex

HBLT-flex is a capacitive sensor for level measurement of HFC/HFO/CO2 refrigerant in industrial refrigeration systems. The sensor has an output signal of 4-20 mA, which is proportional with 0 and 100%. Its output signal is 4 mA for an empty container and 20 mA for a full container. HBLT-flex can be adjusted in length to the current application. The sensor element consists of a 2mm steel wire as well as a Teflon tube. Both parts are provided with a length of 4 m and can be shortened with diagonal cutters or other pliers. HBLT-flex can be used in connection with the HBLT-C1 controller for controlling pumps, etc., or it can be configured to directly control a valve without the need for another controller.

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Product features

Flexible sensor wire, which is adjustable to a length of 0 to 1400 mm with a jump of 50 mm.
Sturdy and reliable design with a standard 4-20 mA output signal.
Designed for the refrigeration industry – max. pressure up to 100 bar.
Split design which makes the sensor easy to install and service. The electronic part can easily be separated from the mechanical part by loosening the threaded union.
Simple calibration for the specified length.
Can be used in compact systems where installation height is low.  
Can be used for marine applications, since measurement is not affected by contact with the metal surface of the overflow pipe.


Connection diagram

HBLC web 1

The sensor can be programmed to either emit a linear signal, which is identical to the tank level, or to regulate a valve for the purpose of obtaining the same level in the tank (float valve).




Power supply
Voltage24 AC/DC + 10%
Max. possible resistance500 ohm
Max consumption50 mA
Plug connectionDIN 0627 - 5 pins
Analog output 4-20 mA, 1 A
Transsistor output - alarmPNP, 1 A
Contact function - alarmNO/NC (Programmable)
Environmental conditions
Ambient temperature-30...+50°C
Refrigerant temperature-60...+60°C
Max. pressure100 bar
Protection degreeIP65
VibrationsIEC 68-2-6 (4g)
Mechanical specifications
Thread connections3/4” NPT 
Adapter - 3/4" NPT / 1" BSPP (option)HBS/ADAP/8/2
SizeSe dimensional drawing
Material - liquid partsAISI 304 / PTFE
Material - electronic partsPlast
House typeAngle
EMC-EmissionEN 61000-3-2
EMC-ImmunityEN 61000-4-2
HBxC-M12/5 5 m - 5 wire
LED indicationGreen, yellow & Red LED
ConfigurationPC tool

Ordering code

Length / threadOrdering code
300 mm / 3/4" NPTHBLT-Flex-3-2
300 mm / 3/4" BSPPHBLT-Flex-3-6
600 mm / 3/4" NPTHBLT-Flex-6-2
600 mm / 3/4" BSPPHBLT-Flex-6-6
800 mm / 3/4" NPTHBLT-Flex-8-2
800 mm / 3/4" BSPPHBLT-Flex-8-6
900 mm / 3/4" NPTHBLT-Flex-9-2
900 mm / 3/4" BSPPHBLT-Flex-9-6
1200 mm / 3/4" NPTHBLT-Flex-12-2
1200 mm / 3/4" BSPPHBLT-Flex-12-6
1400 mm / 3/4" NPTHBLT-Flex-14-2
1400 mm / 3/4" BSPPHBLT-Flex-14-6
Electronic part for HBLT-FLEXHBLT-FLEX-EL