Overview：

  LHDJ-I type electric contact secondary instrument is a new generation of conventional secondary instrument. In addition to the functions of the original secondary instrument, it adopts dual regulated power supply system to solve the problems of unstable external AC power supply voltage, frequent power system failure and other common problems.

Its characteristics are：

  after the failure of the one-way regulated power supply system, the other power supply automatically enters the working state, and the normal working capacity of the instrument can still be guaranteed. The instrument is made of a metal case that is rugged and durable. “Setting effective” is changed from wiring operation mode to “button switch” operation, which makes the operation simpler and more convenient. The display system has been redesigned on the front panel to improve the display effect, and the circuit has been redesigned without “ground conflict” phenomenon, which avoids the mutual interference between the secondary instrument and the external system, so that it matches the DCS system and improves the anti-interference ability. There is no need to install signal isolator, which saves cost. After all-round design and practical application test, it has the characteristics of simple operation, clear water level display and stable operation, which has reached the advanced level at home and abroad.