Basic Parameters

Overview

ZTD type displacer liquid level (interface) transmitter can be used to measure liquid level, interface or density, output 4 ~ 20mA current signal with HART communication protocol.

 Through a compatible HART communicator, the level controller can be queried, configured, calibrated or tested, and the information of a single measurement loop can also be accepted, 

and the information on site can be transmitted to the control system.

Working Principle

ZTD series intelligent displacer liquid (interface) level transmitter is composed of controller, chamber, displacer, torque tube and  other components. 

The change of the liquid level causes the buoyancy of the displacer to change, and the change is  transmitted to the torque tube assembly, so that the torque tube and the mandrel rotate an angle synchronously. 

A sensing  system coupled to the torque tube mandrel generates a voltage signal. The electronic component of the liquid level controller  measures the liquid (interface) level signal and provides a 4-20mA current output. 

The microcontroller measures the ambient  temperature to compensate for changes in liquid density due to process temperature changes. 

LCD can display information  such as analog output, process variable, process temperature (RTD needs to be installed), torque tube rotation angle and  Overview ZTD type displacer liquid level (interface) transmitter can be used to measure liquid level, 

interface or density, output 4 ~ 20mA current signal with HART communication protocol. Through a compatible HART communicator, the level controller can be queried, configured, calibrated or tested, and the information of a single measurement loop can also be accepted, and the information  on site can be transmitted to the control system. percentage range of liquid (interface) level.