Water Level Sensor Selection Achieving Optimal Results With 0.5%-1% Accuracy And 4-20mA/NPN/PNP/RS485/0-3V Output

Clear the range of water level change in the application scenario: First of all, clear the range of minimum to maximum water level in actual use.

Reserve a certain amount of margin: In order to cope with some special circumstances, such as the rainstorm resulting in the abnormal water storage of the reservoir, it is best to reserve a certain amount of margin when determining the measurement range, to ensure that the sensor can still accurately measure when the water level exceeds the normal situation, and to avoid the phenomenon of exceeding the range and not working normally.

• Ultrasonic water level gauge range: 0-30 meters
• Radar water level gauge range: 0-100 meters
• Capacitance water level meter range: 1-2 meters

Select according to the accuracy requirements of the application:

High-precision demand scenario: In some scientific experiments, such as studying the effect of water on the reaction of a substance under small changes, or in the field of high-precision industrial control, such as the precise control of the water level of the cooling water tank in the production of precision electronic components, millimeter-level or even higher precision water level sensors may be required to ensure the accuracy of the experimental data and the stability and reliability of the production process.

General precision demand scenario: For ordinary domestic water tanks, such as living water tanks on the roof of residential buildings, only need to roughly grasp the water level to arrange water supply, centimeter-level accuracy sensors can usually meet the requirements.

• Radar water level accuracy: ±2mm~±5mm
• Ultrasonic water level accuracy: 0.5%~1%
• Capacitance water level accuracy: 0.5%~1%

Analog signal output: such as output 0-5V voltage signal or 4-20mA current signal, such signals can be easily connected to conventional instruments, data acquisition cards and other equipment for display and further processing, suitable for simple monitoring systems.

Digital signal output: For example, sensors that use RS485, Modbus and other communication protocols to output digital signals are easy to access complex automated control systems and remote monitoring systems to achieve data interaction and centralized management between multiple devices.