FS210 series electronic flow switch

- Wide range

The switch points can be set or the range defined by pressing the keys. More parameters can also be set through a handheld setter or a computer

Eight leds display the flow trend and switch status

-PNP/NPN/ relay output is optional

The inductive key setting is extremely easy to operate

- Protection grade IP67

Compact structure with a diameter of 36mm

The exit direction can be rotated 330°

Thermal flow switches operate based on the principle of thermal diffusion and are composed of heating elements and temperature detection elements. When the fluid flows, it takes away the heat of the heating elements, causing the temperature difference perceived by the temperature detection elements to change. After being processed by the electronic circuit, it is converted into a switch signal. This type of flow switch features high sensitivity, rapid response and strong adjustability, and plays a significant role in fields such as hydraulics/lubrication, pump protection, cooling systems, ventilation systems, water treatment and leakage detection.

1. Hydraulic/Lubrication System

In hydraulic systems, thermal electronic flow switches are used to monitor the flow of hydraulic oil and ensure the stable operation of the system. The hydraulic systems of various types of construction machinery and machine tools rely on hydraulic oil to transmit power. If the flow of hydraulic oil is insufficient or interrupted, it will cause abnormal operation of the equipment or even damage. The thermal electronic flow switch is installed in the hydraulic pipeline to monitor the hydraulic oil flow in real time. Once the flow drops below the set threshold, it immediately sends a switch signal to trigger the alarm device or control the hydraulic pump to stop working, avoiding faults such as wear and jamming of hydraulic components caused by lack of oil. In lubrication systems, whether it is the centralized lubrication system of large industrial equipment or the single-point lubrication system of precision machinery, thermal electronic flow switches can monitor the delivery of lubricating oil. For instance, in the lubrication system of the gearbox of a wind turbine generator set, accurately controlling the flow of lubricating oil can effectively reduce gear wear and extend the service life of the equipment. The flow switch promptly feedback abnormal lubricating oil flow, facilitating maintenance personnel to quickly locate and solve problems. ​​

2. Pump Protection

As the core equipment for transporting fluids in industrial production, pumps require reliable protective measures. Thermal electronic flow switches can be installed on the inlet and outlet pipes of the pump to monitor the actual flow of the pump. When the pump experiences faults such as idling, cavitation, or pipeline blockage, causing a decrease in flow rate, the flow switch acts promptly, transmitting a signal to the control system. The control system can automatically stop the pump's operation or start a backup pump to prevent damage to the pump due to dry running or overload. In industries such as chemical engineering and petroleum, the conveyed media often have characteristics such as corrosiveness, flammability and explosiveness. Once a pump is damaged, it may cause serious safety accidents. Thermal electronic flow switches provide reliable protection for pumps and ensure production safety. ​​​

3. Cooling System

In the cooling system, thermal electronic flow switches are used to monitor the flow of coolant or cooling gas. In data centers, the heat generated by the operation of a large number of servers needs to be dissipated through the cooling system. Thermal electronic flow switches monitor the flow of coolant in the pipes to ensure the normal operation of the heat dissipation devices and maintain the stable operating temperature of the servers. In the cooling system of a car engine, the flow switch monitors the coolant flow in real time. When the flow is insufficient, it promptly alerts the driver or automatically activates the alarm system to prevent the engine from being damaged due to overheating. For the cooling of high-temperature equipment in industrial production, such as the cooling of steelmaking furnaces in the metallurgical industry and the heat dissipation cooling of electronic devices, thermal electronic flow switches ensure the stable flow of cooling media, enhancing the reliability and service life of the equipment.​

4. Ventilation System

The ventilation system is responsible for regulating the indoor air quality and ambient temperature, and the thermal electronic flow switch plays an important role in this. In the ventilation systems of large commercial buildings, underground parking lots, industrial plants and other places, flow switches monitor the air flow to ensure that the ventilation effect meets the design requirements. When the ventilation duct is blocked, the fan malfunctions, etc., causing a decrease in air flow, the flow switch sends a signal, and the control system can start the backup fan or issue an alarm to ensure the circulation of indoor air and the health and safety of personnel. In some places with extremely high requirements for air quality, such as hospital operating rooms and pharmaceutical workshops, thermal electronic flow switches precisely control the intake of fresh air and the air circulation flow, maintaining a clean indoor environment.​

5. Water Treatment

In the water treatment process, thermal electronic flow switches are applied in multiple links. In the aeration system of the sewage treatment plant, the air flow is monitored to ensure that the microorganisms in the activated sludge treatment process obtain sufficient oxygen and improve the efficiency of sewage treatment. If the air flow is abnormal, the flow switch will promptly feedback, facilitating the staff to adjust the operating parameters of the aeration equipment. In the dosing stage of drinking water treatment, monitor the flow rate of the chemical solution to ensure that the chemicals are accurately added in proportion and guarantee the disinfection and purification effects. In addition, in the water supply system, the flow switch can monitor the flow of water in the pipeline, which is used for fault diagnosis and flow control. When there is a sudden change in flow due to pipeline leakage or other reasons, it will promptly issue an alarm, facilitating rapid location and repair. ​

6. Leakage Detection

Thermal electronic flow switches play an important role in the field of leakage detection due to their high sensitivity characteristics. In oil and natural gas transportation pipelines, even the slightest leakage can cause huge economic losses and safety hazards. Flow switches are installed at key nodes of the pipeline to monitor the fluid flow in real time. When a leakage occurs, the flow downstream of the leakage point will show abnormal changes. After the flow switch detects the sudden change in flow, it promptly issues an alarm signal to help the staff promptly identify the leakage location and take measures for repair. In the gas and liquid transportation systems of industrial equipment, thermal electronic flow switches can also be used to achieve leakage detection, ensuring the safe and stable operation of the system.