Level transmitter usage instructions

2023-03-21

【Changshu Valve Positioner】Instructions for Using Level Transmitters

The level transmitter is based on the proportional relationship between pressure and liquid height, utilizing isolated diffused silicon sensors or advanced ceramic capacitive pressure sensors. It converts pressure into electrical signals, which after temperature compensation and linear correction, become standard electrical signals for liquid level measurement. Suitable for various media systems in petrochemical, power, metallurgical, pharmaceutical, water supply/drainage, and environmental protection industries. Its compact structure provides users with convenient, simple adjustment and flexible installation. Standard output signals are available for user selection as needed.

Working Principle of Level Transmitters:
When measuring liquid depth, the level transmitter's pressure sensor receives hydrostatic pressure proportional to the liquid density and local gravitational acceleration. The liquid pressure is transmitted through a stainless steel gas-guiding tube to the sensor's positive pressure chamber, while the negative pressure chamber connects to the liquid surface atmosphere. This differential pressure measurement allows precise determination of liquid depth.

Product Features:
- Excellent stability with long-term zero/span stability
- Wide operating temperature range
- Reverse polarity protection and overcurrent protection circuits
- No damage from incorrect installation polarity
- Automatic current limiting during abnormal conditions