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Fr12 electronic flow switch

Principle, structure: Based on the thermal principle, there are two resistors in the closed probe, one of which is heated as the detection resistance, and the other is not heated as the reference resistance. When the medium flows, the heat on the heating resistance is taken away. The resistance value is changed. The difference value of the two resistances is used as the basis for judging the flow rate
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Product introduction

Cx-fs-fr12 electronic flow switch (thermal differential type)
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Principle, structure
Based on the thermal principle, the closed probe contains two resistors, one of which is heated as the detection resistance, the other is not heated as the reference resistance. When the medium flows, the heat on the heating resistance is taken away. The resistance value is changed. The difference between the two resistances is used to judge the flow rate
Features
No moving parts, maintenance free, easy installation. One model is suitable for various pipe diameter requirements. The switch value is continuously adjustable, with extremely low pressure loss and compact structure. LED shows the flow trend and switch status. .?
Application
It can be used for pneumatic and hydraulic systems, for monitoring the cut-off of circulating water, cutting fluid and lubricating oil, as well as pump idling protection.
Technical parameters
Setting range: 1 150 cm / S (water), 3 300 cm / S (oil), 20 2000cm / S (air)
Delta signal output: PNP, NPN, relay, normally open + normally closed (SPDT)
Power supply: 24 V ± 20% DC
Δ making current: max. 400 MA (PNP or NPN), max. 4a (relay type)
Δ no load current: maximum 80mA
Flow indicator: LED row (6)
Delta setting mode: potentiometer setting
△ withstand voltage range: 100bar
Temperature gradient: 4 ℃ / S
Δ response time: 1 -- 13s, typical value: 2S
△ initialization time: 8s
Electrical protection: reverse phase, short circuit and overload protection
Δ protection grade: IP67
Δ medium temperature: - 20 -- 80 ℃
△ ambient temperature: - 20 -- 80 ℃
Storage temperature: - 20 -- 100 ℃
Delta connection mode: M12 connector / directly attached with 2m wire (optional)
△ material: probe: stainless steel, shell: stainless steel,
Weight: 0.4KG
Dimension drawing of fr12 electronic flow switch
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G1 / 4 or G1 / 2 connection thread
Installation
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When the probe is installed from the top to the bottom, it should be installed away from the upper and lower tubes when the air is flowing.
Electrical connection
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Led function and setting
LED is on, or the flow rate is lower than 4mA,
Yellow LED is on: the flow rate is equal to the set value, and the switch acts,
Yellow and green LED on: the flow rate is greater than the set value. The more green lights turn on, the greater the flow rate.
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Install the flow switch so that the medium flows at the flow rate that needs to be monitored, and adjust the potentiometer so that the first green LED just lights up. After that, when the flow rate is lower than the current value, the switch is released. To make the switch point smaller than the current flow rate, adjust the potentiometer to make the green led more bright.
model
Model example Product description
CX-FS-FR12-G12H-DC-RQ G1 / 2 connection, DC24 V power supply, relay output