Controllers & Temperature Controllers

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LU-904K Intelligent Molten Steel Measuring & Control Instrument

Intelligent measuring and control instrument with universal input, temperature sensor support and three alarm outputs.

  • CategoryControllers & Temperature Controllers
  • Model-
  • Views8074 views
  • Updated2026-10-27
Selection customization and technical solution support available. After-sales Service 0086-400-8875-999, Pre-sales Hotline 0086-0592-5711111

I. Overview

The LU-904K smart molten steel measurement and control instrument is an intelligent, high-accuracy digital indicating instrument, mainly suitable for measuring the high temperature of media such as molten steel. The instrument uses the heating rate of the measured medium to determine the maximum temperature of the medium; when the heating rate falls below the set rate, the instrument stops measuring and holds the highest measured value (normal measurement can be restored by pressing a key), and outputs an alarm signal indicating that the temperature sensor can be withdrawn, thereby increasing the service life of the sensor.
The LU-904K smart molten steel measurement and control instrument uses a universal input and is compatible with thermocouple, RTD, standard current, or standard voltage signals. In addition to the maximum temperature alarm, the LU-904K also provides three alarm outputs, each of which can be freely defined as a high-limit or low-limit alarm, with freely settable alarm values. A bar graph displays the measured value.

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

LU-904K Intelligent Molten Steel Measuring & Control Instrument User Manual

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