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The HYDAC flow switches of the HFS 2000 series are based on a variable area float principle. The measuring medium deflects a springloaded float in the direction of flow, depending on the flow rate. A reed contact is fitted outside of the device, therefore separated from the fluid circuit. When the magnet inside the float reaches the pre-set position, the reed contact will switch.
Unit of Measure

Specifications

Model Code Description

 N/A HFS 2156-1W-0020-0060-7-B-1-000

Industry Standards/Certifications

 N/A European Conformity (CE) Mark Directive 2006/95/EC

European Conformity (CE) Mark Directive 2004/108/EC

Type

 N/A Mechanical Pressure Switches

Pressure [Max]

 N/A 3625 psi

Weight

 N/A 2.75 lb

Switching Current

 N/A 1.5 A

Operating Temperature [Min]

 N/A -4 ºF

Operating Temperature [Max]

 N/A 158 ºF

Housing Material

 N/A Brass, Nickel-Plated

Connection Size

 N/A G1, Female on Both Ends

Switch Type

 N/A 1 Change-Over Reed Contact

Electrical Connection

 N/A Male M12 x 4, 4 Pole

Accuracy

 N/A ≤ ± 10% Full Scale (FS)

Degree of Protection

 N/A IP 65

Pin Connection 1

 N/A Center

Pin Connection 2

 N/A N/C Contact

Pin Connection 3

 N/A Not used

Pin Connection 4

 N/A N/O Contact

Fluid Temperature Range

 N/A -4 to 185 ºF

Viscosity Range

 N/A 30 to 600 cSt

Output Repeatability (Full Scale)

 N/A 2 %

Switching Capacity

 N/A 50 V·A125 V

Switching Range

 N/A 20 to 60 L/min

Pressure Drop

 N/A 0.02 to 0.4 psi

Division

 N/A ELECTRONICS

Product Group Family

 N/A FLOW SENSORS

Product

 N/A LEVEL/FLOW SENSORS

Note

N/A The medium must not contain solid particles. We recommend using contamination strainers.

External magnetic fields can affect the switching contact. Ensure sufficient distance from magnetic fields (e.g. from electric motors).