LCD Intelligent Temperature Transmitter 4-20mA HART Protocol Communication

It refers to a temperature transmitter that adopts a liquid crystal display, and is equipped with an internal microprocessor and digital communication capabilities.

1. Advanced Signal Processing: High-precision compensation for nonlinear sensors such as thermocouples.
2. Powerful Communication Capabilities: The most mainstream, superimposing digital signals on 4-20mA to communicate with handheld devices or asset management systems.
3. Rich Display and Configuration: Through LCD cycling display or key switching, temperature, output current, sensor raw values, etc. can be viewed.
4. Equipment Management and Diagnosis: Record operating time, alarm frequency, extreme values; continuously monitor internal circuits and sensor status.
5. Flexible Output and Calculation: Some models can simultaneously output analog and digital signals, or have relay alarm output.

1. Key process control points: Scenarios include core temperature control loops of reaction vessels, distillation columns, and fermentation tanks.
2. Equipment health management: Monitoring of bearing and winding temperatures in large compressors, motors, and turbines.
3. Energy management and metering: Steam flow calculation (requiring temperature and pressure compensation), heat exchanger efficiency monitoring.
4. Pharmaceutical and food industries: Clean areas requiring validation and audit trails, CIP/SIP processes.
5. Remote and unmanned stations: Wellhead monitoring in oil and gas fields, urban heating network, and reservoir water temperature monitoring.

The LCD intelligent temperature transmitter is a typical representative of temperature measurement nodes in the era of Industry 4.0. It successfully integrates the "human-machine interaction interface (LCD)", "edge computing capability (intelligence)" and "network access capability (communication)" into the traditional temperature measurement function.