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Useful info

Oil Return Switch

Technical data: HBOR

The HBOR is a Level Switch designed for automatic oil return in ammonia refrigeration systems. This sensor detects the difference between refrigerant and oil, ensuring that when oil is drained and ammonia surrounds the sensor, the drain valve closes without risking ammonia leaks. It is typically used for oil return and discharge in components such as evaporators, receivers, and oil pots, primarily on the low-pressure side of the system.

Key features

  • Liquid temperature range: Operate across a temperature range of -30°C to 80°C (-22°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: Features a clear LED indicator to signal when oil 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 oil.
Designed for the industrial refrigeration industry - max pressure 100 bar.
Clear indication with LED when 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.

Applications

HBOR Application Drawing

Specifications

Connection diagram

electrical connection unicap

 

Drawing

HBSR

Power supply
Voltage24 V AC/DC + 10%
Max current outputMax 50 mA
Current consumption< 200 mA
Plug connectionISO4400/DIN 43650 - 4 pins
Output
Transistor outputPNP or NPN 
Contact functionNC or NO
Environmental conditions
Ambient temperature-30...+50°C
Max pressure100 bar
Protection degreeIP54 or IP66 (U-version)
VibrationsIEC 60068-2-6 (4g)
Mechanical specifications
Thread connection3/4" & 1/2" NPT or BSPP
Material - liquid partsAISI 304 / PTFE
Material- electronic partsNylon 6 (PA)
Approvals
EMC testEN 61000-2
GOST-RNo 0903044

Ordering code

OutputThread typeConnectionOrdering code
PNP / NO1/2" NPTSet ScrewHBOR-PNP/NO-1
PNP / NC1/2" NPTSet ScrewHBOR-PNP/NC-1
PNP / NO3/4" NPTSet ScrewHBOR-PNP/NO-2
PNP / NC3/4" NPTSet ScrewHBOR-PNP/NC-2
PNP / NO1/2" BSPPSet ScrewHBOR-PNP/NO-5
PNP / NC1/2" BSPPSet ScrewHBOR-PNP/NC-5
PNP / NO3/4" BSPPSet ScrewHBOR-PNP/NO-6
PNP / NC3/4" BSPPSet ScrewHBOR-PNP/NC-6
NPN / NO1/2" NPTSet ScrewHBOR-NPN/NO-1
NPN / NC1/2" NPTSet ScrewHBOR-NPN/NC-1
NPN / NO3/4" NPTSet ScrewHBOR-NPN/NO-2
NPN / NC3/4" NPTSet ScrewHBOR-NPN/NC-2
NPN / NO1/2" BSPPSet ScrewHBOR-NPN/NO-5
NPN / NC1/2" BSPPSet ScrewHBOR-NPN/NC-5
NPN / NO3/4" BSPPSet ScrewHBOR-NPN/NO-6
NPN / NC3/4" BSPPSet ScrewHBOR-NPN/NC-6
Ideal for heat pumps & outdoor installation:
PNP / NO1/2" NPTUnion ConnectionHBOR-U-PNP/NO-1
PNP / NC1/2" NPTUnion ConnectionHBOR-U-PNP/NC-1
PNP / NO3/4" NPTUnion ConnectionHBOR-U-PNP/NO-2
PNP / NC3/4" NPTUnion ConnectionHBOR-U-PNP/NC-2
PNP / NO1/2" BSPPUnion ConnectionHBOR-U-PNP/NO-5
PNP / NC1/2" BSPPUnion ConnectionHBOR-U-PNP/NC-5
PNP / NO3/4" BSPPUnion ConnectionHBOR-U-PNP/NO-6
PNP / NC3/4" BSPPUnion ConnectionHBOR-U-PNP/NC-6
NPN / NO1/2" NPTUnion ConnectionHBOR-U-NPN/NO-1
NPN / NC1/2" NPTUnion ConnectionHBOR-U-NPN/NC-1
NPN / NO3/4" NPTUnion ConnectionHBOR-U-NPN/NO-2
NPN / NC3/4" NPTUnion ConnectionHBOR-U-NPN/NC-2
NPN / NO1/2" BSPPUnion ConnectionHBOR-U-NPN/NO-5
NPN / NC1/2" BSPPUnion ConnectionHBOR-U-NPN/NC-5
NPN / NO3/4" BSPPUnion ConnectionHBOR-U-NPN/NO-6
NPN / NC3/4" BSPPUnion ConnectionHBOR-U-NPN/NC-6

Downloads

Quick guide - HBOR

Instruction manual - HBOR

Drawing (STEP file) - HBOR

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