electronic flow switch
electronic flow switch

SI-210 Electronic Flow Switch for Liquid, Gas and Oil

SI-210 Electronic Flow Switch can be used to monitor the flow of liquid, gas and oil. It can be applied to a variety of situations and have higher safety performance. Sino-Inst’s flow switch support customization.

  • High pressure resistance: 100bar 300bar(optional)
  • Waterproof: IP67
  • Corrosion resistance: stainless steel
  • No moving parts
  • Maintenance-free
  • Easy to install
  • Applicable to various pipe diameters
  • Continuously adjustable switch value
  • Extremely low pressure loss
  • Compact structure
  • LED displays flow trend and switch status.

SI-210 Electronic Flow Switch Introduction

Electronic flow switches are different from mechanical flow switches. Electronic flow switches require power supply, generally 24VDC. There are many principles: turbine, electromagnetic, thermal, ultrasonic, etc. Any flow meter with a switch output can be called an electronic flow switch. When there are high requirements for monitoring liquid flow, electronic flow switches are the right choice.

The core part is still a durable flow meter. Flow meters are reliable in many application fields. The flow meter provides a frequency signal proportional to the flow rate and transmits it to the microprocessor. Monitor the set minimum flow rate and trigger the alarm contact when the flow rate decreases. The electronic flow switch set point adjustment is very easy and accurate, with a wide set point range.

Read More about Flow Switch.

electronic flow switch

SI-210 Electronic Flow Switch Parameters

Setting range Water–1…200cm/s, Oil–3…300cm/s, Air–20…2000 cm/s (Specific factory calibration or on-site customization is required.)
Measurement medium Water, oil, gas and other media compatible with stainless steel
Repeatability 1%@<0.6m/s; 3%@<1.5m/s; 10%@>1.5m/s;
Switch output (NO+NC)
Output type PNP/NPN/Relay optional/NO/NC can be set
Load capacity 500mA at 24Vdc (NPN and PNP type)
60W (relay type)
Display design 3 red LEDs (flow rate < switch point)
1 yellow LED (flow rate = switch point)
4 green LEDs (flow rate > switch point)
Flow indication LED lights (8)
Setting method Button setting
Pressure Resistance 100bar (300bar optional)
Medium temperature change 4°C/s
Response time 1-13s, typical value 2s
Initialization time About 8s
Power supply 24±20%VDC
Electrical protection Reverse phase, short circuit, overload protection
Protection level: IP67
Medium temperature -20-85°C
Ambient temperature -40-85°C
Storage temperature -20-100°C
Wiring method M12 connector/directly attached 2m cable optional
Material Probe: 304 stainless steel;

Housing: 304 stainless steel
Weight About 0.4kg

electronic flow switch

Get a Quick Quote of Electronic Flow Switch

SI-210 Electronic Flow Switch can be used for gas, liquid and oil. Sino-Inst has rich experience in instrument measurement. We can support customization and OEM. We have a one-year warranty. We have a wide range of products. We have reasonable prices. Our products are sold in many places in Asia, Europe, Africa, etc. If you have our product, please contact us. We will serve you at any time.

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SI-210 Electronic Flow Switch ApplicationsSI-210 Electronic Flow Switch Applications

  • Pneumatic system
  • Hydraulic system
  • Circulating water
  • Cutting fluid
  • Lubricating oil
  • Pump idling protection
More Detail

What is the Electronic Flow Switch Working Principle?

SI-210 Electronic Flow Switch is based on the thermal principle. Two resistors are contained in the closed probe. One of them is heated as a detection resistor, and the other is not heated as a reference resistor. When the medium flows, the heat on the heated resistor is taken away. The resistance value is changed, and the difference between the two resistors is used as the basis for judging the flow rate.

electronic flow switch

What is a Digital Flow Switch?

A digital flow switch is an intelligent device used to monitor and control fluid flow. The digital flow switch detects the flow of the fluid through a built-in sensor. When the flow reaches the preset value, the switch will output a signal to monitor and control the flow.

Application scenarios of digital flow switches

  • Semiconductor manufacturing
  • Food processing
  • Pharmaceutical industry
  • Clean environment

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