NHR-218 LCD Isolated Temperature Transmitter

NHR-218 LCD isolated temperature transmitter is used for RTD, thermocouple (TC), resistance (Ω), voltage (mV) signal input, two-wire system 4-20mA analog output, and the configuration is via RS485 (MODBUS RTU protocol) or HART protocol

 

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Features

  • High cost performance, wide voltage design.
  • Digital linearization correction, high precision and high stability.
  • Full-scale temperature and humidity compensation, wide temperature and humidity measurement range, optional measurement range.
  • Flexible installation and convenient use.
  • Small size, light weight and anti-vibration.
  • It can be made into a variety of shapes to facilitate the needs of different customers.

Applications

  • Detection, conversion and transmission of temperature in industrial automation control
  • In the field of environmental monitoring, the measurement and transmission of atmospheric temperature, water temperature, ground temperature and other parameters are realized
  • Used in weather stations, hydrological stations, geological exploration and other fields
  • In the field of medical equipment, it realizes the monitoring and transmission of patient body temperature.
  • Applied to the cold chain logistics industry to monitor and record the ambient temperature of logistics vehicles and cold storage

 

Specification

Input
Input signal RTD, thermocouple, resistance (Ω)
Cold-end compensation temperature range -20~60℃
Compensation accuracy ±1℃
Output
Output signal 4~20mA, or 4~20mA plus HART protocol
Load resistance RL≤(Ue-12)/0.022
Overflow alarm output current at the upper and lower limits. IH=21mA, IL=3.8mA
Input disconnection alarming output current it can be set.
Power source
Power supply voltage DC12~40V
Other parameters
Transmission accuracy (20℃) 0.1%FS
Temperature drift 0.0075%FS/℃
Response time 700ms reaches 90% of the final value.
Ambient temperature in use -40~80℃
Storage temperature -40~100℃
Insulation strength (between input and output) 1500Vrms (1min, no sparkle)
Insulation resistance (between input and output) ≥100MΩ (at 500VDC)
Electromagnetic compatibility In compliance with GB/T 18268 Industrial Equipment Application Requirements (IEC 61326-1).

 

Dimension