liquid level meter-ZTD-G displacer level or interface transmitter is with high performance and lower price made by us.
liquid level meter-ZTD-G Displacer Liquid (Interface) Level Transmitter is one of the knew type of level measuring instruments that have been developed cooperatively by Dandong Top Electronics Instrument Co., Ltd and Magnettop Company in USA. The transmitters can be divided into ZTD-GZ intelligent type and ZTD-GM non-intelligent type according to their different types of signal transmitting parts. Not only can the transmitter indicate the liquid level in a vessel locally on field, but also it can output 4-20mA analogue signals on which the digital signals being conformity with HART PROTOCAL are superimposed. For ZTD-GZ type transmitter, it can be used to form production process measurement and monitoring management systems to realize remote configuration, monitoring, maintenance and calibration, etc functions since it adopts HART bus technique. The transmitters characterize themselves with high precision, low drift, and strong anti-interference ability, etc. So, they can be used extensively for measuring dirty, inflammable, explosive and corrosive, etc fluids levels and transferring the levels signals into analogue signals and transmit them out. They are ideal level measurement instrument for production process control in petroleum, chemical, metallurgy, electrical power and light industrial products industries, etc. The transmitters figure themselves with their fashionable shell structures, elegant appearances and high safety reliability because of separated chambers.
Main Performances and Qualifications | ZTD-GM Non-intelligent | ZTD-GZ Intelligent |
Supply Voltage | 24VDC | 24VDC |
Output Signal | 4-20mA | 4-20mA + HART Protocol |
Precision | 0.5%FS, 1%FS | 0.5%FS, 1%FS |
Field Indication | Ammeter | LCD |
Debugging Method | Adjusting Screw | Field Magnet Switch; Debugging Software + PC; Communicator (Remote) |
Damping Time | 0.2-1.67 Seconds | 0-199 Seconds |
Field and Remote Configuration | Non | Yes |
Exceeding Measuring Range Alarm; Fault Diagnosis | Non | Yes |
Ambient Temperature | -40-70°C | -40-70°C (-30-70°C for field indication) |
Operation Temperature | See Ambient Temperature and Process Temperature Comparing Chart for Transmitter | |
Load Resistance | Load Performance Chart | |
Displacer Weight | See Rating Plate | |
Cable Entry | M20×1.5 (female thread) | |
Protection Grade | IP65 | |
Explosion-proof | See the Appendix | |
Safety Barrier Model | See the Appendix | |
Measurement Type | Measuring Range (mm) | Fluid Density Range |
Liquid Level | 300, 500, 600, 800, 1000, 1500, 2000, 2500 | 0.3 – 1.6g/cm3 |
Interface Level | 500, 600, 800, 1000, 1500, 2000, 2500 | more than 0.1g/cm3 |
Density | 500, 600, 800, 1000, 1500, 2000, 2500 | more than 0.1g/cm3 |
A displacer (cylinder float) is hung at an end of the arm lever (see schematic diagram). The displacer rises and goes down with the changes of the buoyancy F that is produced by the fluid level changes. The buoyancy is transmitted to the arm lever through the displacer. With the action of the buoyancy F and through the driving mandrel that is connected with the level, the arm lever drives the lever rotating, then an end of the level presses the weighing sensor and makes it produce a deformation. The sensor converts the deformation into electric signal. Through the microprocessor’s treatment, the signal is converted into 4-20mA standard signal which will be transmitted.
