Vapor Quality Sensor

Category: HBX-CR-ST / HBX-DX-ST

With a vapor quality sensor integrated into a standard strainer house you are ensured safe functionality of the sensor and easy installation. The butt-welded connection makes it easy to weld with same size of piping.

Please be aware that the flow direction of the vapor quality sensor is opposite of the flow direction when used as a strainer. If installed with wrong flow direction functionality will NOT be correct.

Besides the benefit of easy installation this solution makes it easy to dismantle the lid with the sensor conductor and clean it if necessary.

The sensor integrated into standard strainer housing is available in both carbon steel DN20 to DN300 and stainless steel DN20 to DN65. Ask for availability if size outside of this range is requested

Product selection guide

To find the right part number to purchase please use our selection guide in the shop (link below), product overview under "ordering code" or send our Product Manager Henrik Kudsk a system description and he will guide you to the right part number. Please use the "Product Specification Form (find it under the "downloads" tab on this product page) and e-mail it to  

Shop image

Product features

Measures the volumetric concentration of gas in a gas/liquid mixture
Balanced evaporator control to achieve semi-flooded operation with high heat transfer
Able to control an expansion valve directly with simultaneously analog 4-20mA output to a PLC
Can be used to optimize and control both DX systems and overfeed systems
Instant measurement and analog output
Can be used for all common refrigerants


Flooded system:

HBX ST flooded applikationstegning

Optimum efficiency at all loads is obtain by measuring the Vapor Quality in the outlet of the evaporator and use the signal to change the height of the driving head as shown, lower level will minimize the liquid amount  in the evaporator and secure balanced and dynamic evaporation  during part load and thus optimum heat transfer.

The HBX-OVC-ST Vapor Quality control signal (cable out, 4-20mA) is connected to DI 3 (pin 3) on the HBSLC liquid level sensor and used to change the desired set value for the liquid level in the recirculation vessel/separator.


DX System:

Aptegning DX web 1000px



Technical data:


Connection Diagram





 Danfoss Strainer DN20 DN65 profiltegninger WEB


Tabel Dimensioner DN20 DN65





Danfoss Strainer DN65 DN200 profiltegninger WEB

 Tabel Dimensioner DN80 DN200

Danfoss Strainer DN250 DN300 profiltegning WEB

Tabel Dimensioner DN250 DN300

Strainer small

In the sizes DN20-DN40 the strainer is extended with a 100 mm tube.

Power supply
Voltage24 V AC/DC 
Current consumptionMax 600 mA
Electronic connectionM12, 5 pins
Analog signal4-20 mA
ControlBuild in controller for valve (optional)
Environmental conditions
RefrigerantsApplicable to HC, HFC/HFO, NH3, CO2
Temperature range–60°C/+150°C (–76°F/+302°F).
Max. Working pressure52 barg (754 psig).
Degree of protectionIP65
Vibrations IEC 68-2-6 (4g) 
Mechanical specifications
Welding connectionButt weld
Material liquid partsAISI 304 / PEEK Carbon Steel
Material - electronic partsGF BLK, Nylon 6 (PA)
SizeSee drawing and table
WeightSee ordering codes
TypeFront house
EMC testEN 61000-2
5 m cabel with. M12 plugHBxC-M12/5 
Cabel specificationsPUR -5 x 0,34mm2 
LED indicationLED (green, yellow og red)
ConfigurationWith HB Tool
Valve control (Modulating valve)
Signal to valve4-20 mA
Valve regulationPI-regulation
Valve control (PWM)
Signal to valve24V AC/DC
Valve control (Stepper motor)
Stepper motor steps25-5000 steps
Stepper motor speed2-40 m/s
Stepper motor phase current0-750 mA
Stepper motor holding current0-250 mA
Cable specification (valve control)
Length3 m (118”)
Cable size3 x 0.75 mm2
Cable glandsPG7 / M8
* Total consumption is sensor consumption plus output and it depends on ambient temperature.

Ordering code

Pipe diameterMaterialDesignDirect valve controlOrdering code
DN 20Carbon SteelOverfeed SystemsN.A.HBX-CR-ST-DN20
DN 25Carbon SteelOverfeed SystemsN.A.HBX-CR-ST-DN25
DN 32Carbon SteelOverfeed SystemsN.A.HBX-CR-ST-DN32
DN 40Carbon SteelOverfeed SystemsN.A.HBX-CR-ST-DN40
DN 50Carbon SteelOverfeed SystemsN.A.HBX-CR-ST-DN50
DN 65Carbon SteelOverfeed SystemsN.A.HBX-CR-ST-DN65
DN 80Carbon SteelOverfeed SystemsN.A.HBX-CR-ST-DN80
DN 100Carbon SteelOverfeed SystemsN.A.HBX-CR-ST-DN100
DN 125Carbon SteelOverfeed SystemsN.A.HBX-CR-ST-DN125
DN 150Carbon SteelOverfeed SystemsN.A.HBX-CR-ST-DN150
DN 200Carbon SteelOverfeed SystemsN.A.HBX-CR-ST-DN200
DN 250Carbon SteelOverfeed SystemsN.A.HBX-CR-ST-DN250
DN 300Carbon SteelOverfeed SystemsN.A.HBX-CR-ST-DN300
DN 20Stainless SteelOverfeed SystemsN.A.HBX-CR-ST-DN20-SS
DN 25Stainless SteelOverfeed SystemsN.A.HBX-CR-ST-DN25-SS
DN 32Stainless SteelOverfeed SystemsN.A.HBX-CR-ST-DN32-SS
DN 40Stainless SteelOverfeed SystemsN.A.HBX-CR-ST-DN40-SS
DN 50Stainless SteelOverfeed SystemsN.A.HBX-CR-ST-DN50-SS
DN 65Stainless SteelOverfeed SystemsN.A.HBX-CR-ST-DN65-SS
DN 80Stainless SteelOverfeed SystemsN.A.HBX-CR-ST-DN80-SS
DN 100Stainless SteelOverfeed SystemsN.A.HBX-CR-ST-DN100-SS
DN 20Stainless SteelDX SystemsN.A.HBX-DX-ST-DN20
DN 25Stainless SteelDX SystemsN.A.HBX-DX-ST-DN25
DN 32Stainless SteelDX SystemsN.A.HBX-DX-ST-DN32
DN 40Stainless SteelDX SystemsN.A.HBX-DX-ST-DN40
DN 50Stainless SteelDX SystemsN.A.HBX-DX-ST-DN50
DN 65Stainless SteelDX SystemsN.A.HBX-DX-ST-DN65
DN 80Carbon SteelDX SystemsN.A.HBX-DX-ST-DN80
DN 100Carbon SteelDX SystemsN.A.HBX-DX-ST-DN100
DN 125Carbon SteelDX SystemsN.A.HBX-DX-ST-DN125
DN 150Carbon SteelDX SystemsN.A.HBX-DX-ST-DN150
DN 200Carbon SteelDX SystemsN.A.HBX-DX-ST-DN200
DN 250Carbon SteelDX SystemsN.A.HBX-DX-ST-DN250
DN 300Carbon SteelDX SystemsN.A.HBX-DX-ST-DN300
DN 20Stainless SteelDX SystemsN.A.HBX-DX-ST-DN20-SS
DN 25Stainless SteelDX SystemsN.A.HBX-DX-ST-DN25-SS
DN 32Stainless SteelDX SystemsN.A.HBX-DX-ST-DN32-SS
DN 40Stainless SteelDX SystemsN.A.HBX-DX-ST-DN40-SS
DN 50Stainless SteelDX SystemsN.A.HBX-DX-ST-DN50-SS
DN 65Stainless SteelDX SystemsN.A.HBX-DX-ST-DN65-SS
DN 80Stainless SteelDX SystemsN.A.HBX-DX-ST-DN80-SS
DN 100Stainless SteelDX SystemsN.A.HBX-DX-ST-DN100-SS
DN 20Carbon SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN20/C
DN 25Carbon SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN25/C
DN 32Carbon SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN32/C
DN 40Carbon SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN40/C
DN 50Carbon SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN50/C
DN 65Carbon SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN65/C
DN 80Carbon SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN80/C
DN 100Carbon SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN100/C
DN 125Carbon SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN125/C
DN 150Carbon SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN150/C
DN 200Carbon SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN200/C
DN 250Carbon SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN250/C
DN 300Carbon SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN300/C
DN 20Stainless SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN20-SS/C
DN 25Stainless SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN25-SS/C
DN 32Stainless SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN32-SS/C
DN 40Stainless SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN40-SS/C
DN 50Stainless SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN50-SS/C
DN 65Stainless SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN65-SS/C
DN 80Stainless SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN80-SS/C
DN 100Stainless SteelOverfeed SystemsModulating ValveHBX-CR-ST-DN100-SS/C
DN 20Carbon SteelDX SystemsModulating ValveHBX-DX-ST-DN20/C
DN 25Carbon SteelDX SystemsModulating ValveHBX-DX-ST-DN25/C
DN 32Carbon SteelDX SystemsModulating ValveHBX-DX-ST-DN32/C
DN 40Carbon SteelDX SystemsModulating ValveHBX-DX-ST-DN40/C
DN 50Carbon SteelDX SystemsModulating ValveHBX-DX-ST-DN50/C
DN 65Carbon SteelDX SystemsModulating ValveHBX-DX-ST-DN65/C
DN 80Carbon SteelDX SystemsModulating ValveHBX-DX-ST-DN80/C
DN 100Carbon SteelDX SystemsModulating ValveHBX-DX-ST-DN100/C
DN 125Carbon SteelDX SystemsModulating ValveHBX-DX-ST-DN125/C
DN 150Carbon SteelDX SystemsModulating ValveHBX-DX-ST-DN150/C
DN 200Carbon SteelDX SystemsModulating ValveHBX-DX-ST-DN200/C
DN 250Carbon SteelDX SystemsModulating ValveHBX-DX-ST-DN250/C
DN 300Carbon SteelDX SystemsModulating ValveHBX-DX-ST-DN300/C
DN 20Stainless SteelDX SystemsModulating ValveHBX-DX-ST-DN20-SS/C
DN 25Stainless SteelDX SystemsModulating ValveHBX-DX-ST-DN25-SS/C
DN 32Stainless SteelDX SystemsModulating ValveHBX-DX-ST-DN32-SS/C
DN 40Stainless SteelDX SystemsModulating ValveHBX-DX-ST-DN40-SS/C
DN 50Stainless SteelDX SystemsModulating ValveHBX-DX-ST-DN50-SS/C
DN 65Stainless SteelDX SystemsModulating ValveHBX-DX-ST-DN65-SS/C
DN 80Stainless SteelDX SystemsModulating ValveHBX-DX-ST-DN80-SS/C
DN 100Stainless SteelDX SystemsModulating ValveHBX-DX-ST-DN100-SS/C
DN 20Carbon SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN20/PWM
DN 25Carbon SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN25/PWM
DN 32Carbon SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN32/PWM
DN 40Carbon SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN40/PWM
DN 50Carbon SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN50/PWM
DN 65Carbon SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN65/PWM
DN 80Carbon SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN80/PWM
DN 100Carbon SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN100/PWM
DN 125Carbon SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN125/PWM
DN 150Carbon SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN150/PWM
DN 200Carbon SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN200/PWM
DN 250Carbon SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN250/PWM
DN 300Carbon SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN300/PWM
DN 20Stainless SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN20-SS/P
DN 25Stainless SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN25-SS/P
DN 32Stainless SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN32-SS/P
DN 40Stainless SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN40-SS/P
DN 50Stainless SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN50-SS/P
DN 65Stainless SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN65-SS/P
DN 80Stainless SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN80-SS/P
DN 100Stainless SteelOverfeed SystemsPulse width modulating valveHBX-CR-ST-DN100-SS/P
DN 20Carbon SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN20/PWM
DN 25Carbon SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN25/PWM
DN 32Carbon SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN32/PWM
DN 40Carbon SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN40/PWM
DN 50Carbon SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN50/PWM
DN 65Carbon SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN65/PWM
DN 80Carbon SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN80/PWM
DN 100Carbon SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN100/PWM
DN 125Carbon SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN125/PWM
DN 150Carbon SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN150/PWM
DN 200Carbon SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN200/PWM
DN 250Carbon SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN250/PWM
DN 300Carbon SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN300/PWM
DN 20Stainless SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN20-SS/P
DN 25Stainless SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN25-SS/P
DN 32Stainless SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN32-SS/P
DN 40Stainless SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN40-SS/P
DN 50Stainless SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN50-SS/P
DN 65Stainless SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN65-SS/P
DN 80Stainless SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN80-SS/P
DN 100Stainless SteelDX SystemsPulse width modulating valveHBX-DX-ST-DN100-SS/P
DN 20Carbon SteelOverfeed SystemsStepper ValveHBX-CR-ST-DN20/S
DN 25Carbon SteelOverfeed SystemsStepper ValveHBX-CR-ST-DN25/S
DN 32Carbon SteelOverfeed SystemsStepper ValveHBX-CR-ST-DN32/S
DN 40Carbon SteelOverfeed SystemsStepper ValveHBX-CR-ST-DN40/S
DN 50Carbon SteelOverfeed SystemsStepper ValveHBX-CR-ST-DN50/S
DN 65Carbon SteelOverfeed SystemsStepper ValveHBX-CR-ST-DN65/S
DN 80Carbon SteelOverfeed SystemsStepper ValveHBX-CR-ST-DN80/S
DN 100Carbon SteelOverfeed SystemsStepper ValveHBX-CR-ST-DN100/S
DN 125Carbon SteelOverfeed SystemsStepper ValveHBX-CR-ST-DN125/S
DN 150Carbon SteelOverfeed SystemsStepper ValveHBX-CR-ST-DN150/S
DN 200Carbon SteelOverfeed SystemsStepper Valve HBX-CR-ST-DN200/S
DN 250Carbon SteelOverfeed SystemsStepper ValveHBX-CR-ST-DN250/S
DN 300Carbon SteelOverfeed SystemsStepper ValveHBX-CR-ST-DN300/S
DN 20Stainless SteelOverfeed SystemsStepper ValveHBX-CR-ST-DN20-SS/S
DN 25Stainless SteelOverfeed SystemsStepper ValveHBX-CR-ST-DN25-SS/S
DN 32Stainless SteelOverfeed SystemsStepper ValveHBX-CR-ST-DN32-SS/S
DN 40Stainless SteelOverfeed SystemsStepper ValveHBX-CR-ST-DN40-SS/S
DN 50Stainless SteelOverfeed SystemsStepper ValveHBX-CR-ST-DN50-SS/S
DN 65Stainless SteelOverfeed SystemsStepper ValveHBX-CR-ST-DN65-SS/S
DN 80Stainless SteelOverfeed SystemsStepper ValveHBX-CR-ST-DN80-SS/S
DN 100Stainless SteelOverfeed SystemsStepper ValveHBX-CR-ST-DN100-SS/S
DN 20Carbon SteelDX SystemsStepper ValveHBX-DX-ST-DN20/S
DN 25Carbon SteelDX SystemsStepper ValveHBX-DX-ST-DN25/S
DN 32Carbon SteelDX SystemsStepper ValveHBX-DX-ST-DN32/S
DN 40Carbon SteelDX SystemsStepper ValveHBX-DX-ST-DN40/S
DN 50Carbon SteelDX SystemsStepper ValveHBX-DX-ST-DN50/S
DN 65Carbon SteelDX SystemsStepper ValveHBX-DX-ST-DN65/S
DN 80Carbon SteelDX SystemsStepper ValveHBX-DX-ST-DN80/S
DN 100Carbon SteelDX SystemsStepper ValveHBX-DX-ST-DN100/S
DN 125Carbon SteelDX SystemsStepper ValveHBX-DX-ST-DN125/S
DN 150Carbon SteelDX SystemsStepper ValveHBX-DX-ST-DN150/S
DN 200Carbon SteelDX SystemsStepper ValveHBX-DX-ST-DN200/S
DN 250Carbon SteelDX SystemsStepper ValveHBX-DX-ST-DN250/S
DN 300Carbon SteelDX SystemsStepper ValveHBX-DX-ST-DN300/S
DN 20Stainless SteelDX SystemsStepper ValveHBX-DX-ST-DN20-SS/S
DN 25Stainless SteelDX SystemsStepper ValveHBX-DX-ST-DN25-SS/S
DN 32Stainless SteelDX SystemsStepper ValveHBX-DX-ST-DN32-SS/S
DN 40Stainless SteelDX SystemsStepper ValveHBX-DX-ST-DN40-SS/S
DN 50Stainless SteelDX SystemsStepper ValveHBX-DX-ST-DN50-SS/S
DN 65Stainless SteelDX SystemsStepper ValveHBX-DX-ST-DN65-SS/S
DN 80Stainless SteelDX SystemsStepper ValveHBX-DX-ST-DN80-SS/S
DN 100Stainless SteelDX SystemsStepper ValveHBX-DX-ST-DN100-SS/S


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