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myHYDAC
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.

To protect it from external influences, the reed contact is encapsulated in a housing designed to allow steplessly variable adjustment. The devices are designed to be capable of monitoring threshold values reliably, even when the viscosity fluctuates.
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HFS 2000
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HFS 2000
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HFS 2000
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Description N/A 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.
Model Code Description N/A HFS 2145-1S-0001-0004-7-B-1-000 N/A HFS 2135-2W-0002-0008-7-B-1-000 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 3.5 lb N/A 3.34 lb N/A 2.75 lb
Switching Current N/A 3 A N/A 1.5 A 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 G1/4, Female on Both Ends N/A G3/8, Female on Both Ends N/A G1, Female on Both Ends
Switch Type N/A 1 Normally Open Reed Contact N/A 2 Change-Over Reed Contact N/A 1 Change-Over Reed Contact
Electrical Connection N/A Male EN175301-803 (DIN 43650) N/A Male EN175301-803 (DIN 43650) 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/O Contact N/A N/C Contact N/A N/C Contact
Pin Connection 3 N/A Not used N/A N/O Contact N/A Not used
Pin Connection 4 N/A N/A N/A N/O Contact
Pin Connection (Ground) N/A Housing N/A Housing N/A
Fluid Temperature Range N/A -4 to 248 ºF N/A -4 to 248 ºF 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 100 V·A230 V N/A 50 V·A250 V N/A 50 V·A125 V
Switching Range N/A 1 to 4 L/min N/A 2 to 8 L/min N/A 20 to 60 L/min
Pressure Drop N/A 0.02 to 0.4 psi
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).
Core Products N/A
Division N/A FILTER SYSTEMS N/A ELECTRONICS N/A ELECTRONICS
Product Group Family N/A PORTABLE OFFLINE FILTRATION N/A FLOW SENSORS N/A FLOW SENSORS
Product N/A OFF-LINE FILTERS N/A LEVEL/FLOW SENSORS N/A LEVEL/FLOW SENSORS