Controllers & Temperature Controllers

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LU-904M Intelligent Measuring & Control Instrument

Measuring and control instrument for level, temperature and pressure measurement.

  • CategoryControllers & Temperature Controllers
  • Model-
  • Views7443 views
  • Updated2026-10-27
Selection customization and technical solution support available. After-sales Service 0086-400-8875-999, Pre-sales Hotline 0086-0592-5711111

Built on the LU-604 smart measurement and control instrument, the LU-904M smart measurement and control instrument further improves the instrument's noise immunity and overall performance through a modular structure, EMI suppression, and other technologies. The LU-904M is an intelligent, high-accuracy digital indicating instrument for level, temperature, and pressure measurement and control; connected with level, pressure, and temperature sensors and transmitters, it can form level, temperature, and pressure measurement and control systems of various ranges and specifications. The input signal of the LU-904M can be changed freely, and it can be connected to thermocouples, RTDs, 0-10mA or 4-20mA standard current, and 0-5V, 1-5V standard voltage signals. The LU-904M provides four alarm outputs, each of which can be freely defined as a high-limit or low-limit alarm; it can provide 0-10mA and 4-20mA standard current transmitter outputs with freely settable output values, as well as a DC24V/50mA transmitter supply output. A bar graph displays the measured value. The LU-904M is an intelligent, high-accuracy digital indicating instrument for level, temperature, and pressure measurement and control; connected with level, pressure, and temperature sensors and transmitters, it can form systems of various ranges and specifications.

Main Technical Specifications
Basic error: ±(0.2%F.S±1) digit Resolution: 1,0.1
Special input: R,WRe526,mV,others Cold junction compensation error: ±1°C
Broken sensor or over-range: Display symbol Sb Sampling period: 0.5 s
Power supply: 85~264VAC Power consumption: 4W
Input specifications: K,S,B,T,E,J,Wre325,N,Pt100,Cu50,Cu100,0-10mA,4-20mA,0-5V,1-5V
Output module specifications
J1 Relay output (3A, NO + NC) J2 Relay output (0.8A, NO)
T Solid-state relay trigger output V1 CV12V/50mA supply module
V2 DC24V/50 mA supply module V3 DC5 V/50 mA supply module
R RS232 communication module S RS485 communication module
I2 0-10mA/4-20mA transmitter output V5 Voltage transmitter output

 

Dimensions and panel cutout (W×H×D)  Unit: mm
Type A: 96×96×105  Cutout: 92×92        Type B: 48×96×105  Cutout: 45×92
Type C: 96×48×105  Cutout: 92×45        Type D: 160×80×105  Cutout: 152×76
Type E: 80×160×105  Cutout: 76×152      Type F: 72×72×105  Cutout: 68×68
Type G: 48×48×100  Cutout: 44×44

LU-904M Intelligent Measuring & Control Instrument User Manual

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