MJ-678 G1/2'' Diameter flow switch

MJ-678 G1/2\'\' Diameter flow switch
Product Name

MJ-678 G1/2'' Diameter flow switch

  • Model: MJ-B678
  • Shipping Weight: 0.08kg
  • Units in Stock: 89995

Price:   $5.00

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The principle of operation

Flow switch is the presence or absence of flow through the output switch control signal to the water sensor switch, the main switch signal. Divided into specific types normally open and normally closed type, in the main water control work flow monitoring role to play. Water flow switch and relay use with the usual components of the water control system, easy to use, no power is the flow switch on.



Mainly used for water heater, boiler, water dispensers, coffee machines, hot card machines, steam equipment, water system, the campus card sales, selling self-help water systems, water treatment equipment, cooling systems, mechanical equipment, instrumentation, pharmaceutical equipment.



Electrical Characteristics



Max water pressure



max switching voltage

100VDC(DC voltage)


Insulation resistance



Electric strength

>600VAC,Duration of the leakage current 3MA 5S


Max carry current



Working flow range



Start water flow



Low temperature test

In the temperature of -20 ℃ 72h,at room temperature 1h, the first measurement accuracy of within ± 5%


High temperature test

In the temperature of 85 ℃ 72h,at room temperature 1h, the first measurement accuracy of within ± 5%


Application Temperature



Max carry contact rating



Min breakdown voltage

220VDC(DC Voltage)


Response time





Water flow switch Installation instructions


1, flow switch installation environment to avoid strong vibration, and shaking with the local magnetic environment, in order to avoid the flow switch malfunction. In order to avoid particles, debris into the water flow switch must be installed in the inlet filter.

2, when the magnetic material close to the water flow switch, its characteristics may change.

3, flow switches, relays must be compatible with use, as less power reed switch (typically 10W and 70W) easy to burn. Relay maximum power 3W, 3W power will be greater than the normally open and normally closed phenomenon.


Routine maintenance

Periodically clear the guide rod and float on the dirt (as the media cycle may be).

Check for the loose buckle.





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