Customized IP67 High Sensitivity Relay Output Water/Oil Thermal Flow Switch

FES thermal diffusion electronic flow switch can monitor the liquid flow in the pipeline in real time, provide switch output, and use 6 LEDs to display the fluid flow rate status in real time, which can realize the following monitoring functions: medium flow, reduce/increase flow rate; medium Presence/absence; medium flow/still; monitoring the fluid flow rate in the pipeline, monitoring the interruption of flow or preventing the idling of the pump. It is widely used in petrochemical, electric power, metallurgy, steel mills, papermaking, food processing, water treatment, battery factories and other industries.

FES Electronic Flow Switch Features:

1. Affordable, suitable for mass use on equipment, reducing costs.

2. Replace the baffle type flow switch, with sensitive action and long service life.

3. Can effectively prevent entanglement.

4. Full waterproof shell design.

5. It is suitable for a large range of pipe diameters, and the set point can be adjusted arbitrarily.

6. The indicator light directly displays the flow change.

       Conventional flow switches or flow indicators mostly use baffles or pistons, which rely on liquid flow to push the baffles or pistons to act. The water resistance is large, the flow loss is large, the accuracy is poor, and it is impossible to monitor small flow. The sealing part is sealed with metal bellows, which is resistant to pressure difference and prone to metal fatigue burst.

working principle:

       FES economical electronic flow switches are designed based on the principle of heat exchange. The probe has a built-in heating module and a heat-sensing module. The heat conduction of the flow switch is closely related to the flow rate of the medium. During measurement, the heat-generating module emits heat. If there is no medium flowing in the pipe, the heat received by the heat-sensing module is a fixed value. When there is a medium flowing, the heat received by the thermal module will change with the flow rate of the medium. The thermal module converts the temperature difference signal into an electrical signal, and then converts it into a corresponding standard analog signal or contact through the processor. Signal output, the flow switch displays and controls the flow rate of the medium through this signal.

Technical parameter:
Measuring range	water: 0.03 ~3m/s; Oil: 0.0 3 ~3m/s;
Withstand voltage	1.6 MPa
Connection	Thread G 1 / 2 ", G 1 / 4 ", other
Switching time	ON: Typical ≥4 s (1 ~1 3s); O F F : Typical ≥ 4 s (1 ~ 1 5s)
Temperature change response	≤1 2 s
Working voltage	DC 2 4 V
Power consumption	2 W
Output	Relay, N P N / P N P
Contact capacity	2 A / 2 2 0 VAC, 3 A / 30VDC
Insulation resistance	100 MΩ at 100V DC
Number of control contacts	1 pair
Probe material	304 stainless steel
Shell material	PP
Working temperature	- 10ºC- 60ºC
Environmental conditions	- 2 0 ~8 5ºC,≤8 5 % RH
Protection class	IP67