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Pyrometer optris CT 3M for low-temperature measurements of metal
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Due to its short measuring wavelength and a temperature range from 50°C on, the pyrometer optris CT 3M, is ideally suited for employment inlow-temperature measurements of metals and composite materials. The quick response time of only 1 ms allows for a problem-free use of the metal thermometer in fast processes.

The electronics box of the measuring device allows a flexible terminal device through selectable analog outputs as well as various optional digital interfaces.

  • Temperature range:
    50°C to 1,800°C
  • Spectral range: 2.3 µm
  • Response time: 1 ms

Applications:

The IR thermometer optris CT 3M has a measuring wavelength of 2.3 µm and is thus employed in temperature measurements of metallic surfaces and composite materials in processing. Especially its low temperature range from 50°C on make the temperature sensor a popular measuring device for every kind of low-temperature measurement of metals.

Software:

The temperature analysis software optris Compact Connect has been developed specifically for the extensive documentation and analysis of temperature measurement data of our stationary infrared thermometers. It is license-free and included in every pyrometer shipment.    

Measurement Specifications

  • Temperature ranges1) (scalable via programming keys or software):
    50°C ... 400°C (3ML)
    100°C ... 600°C (3MH)
    150°C ... 1000°C (3MH1)
    200°C ... 1500°C (3MH2)
    250°C ... 1800°C (3MH3)
  • Spectral range: 2.3 µm
  • Optical resolution (90% energy): 
    22:1 (3ML)
    33:1 (3MH)
    75:1 (3MH1-H3)
  • System accuracy2) (at ambient temperature 23 ± 5°C): ± (0.3% of reading + 1°C)
  • Repeatability (at ambient temperature 23 ± 5°C): ± (0.1% of reading + 1°C)
  • Temperature resolution (display): 0.1 K
  • Exposure time3): 1 ms (90%)
  • Emissivity / Gain (adjustable via programming keys or software): 0.100 - 1.100
  • Transmissivity / Gain (adjustable via programming keys or software): 0.100 - 1.100
  • Signal processing (parameter adjustable via programming keys or software, respectively): 
    peak hold, valley hold, average, extended hold function with threshold and hysteresis

General Specifications

  • Environmental rating: IP 65 (NEMA-4)
  • Ambient temperature: 
    sensing head: -20°C ... 85°C
    electronics: 0°C ... 85°C
  • Storage temperature: 
    sensing head: -40°C ... 125°C
    electronics: -40°C ... 85°C
  • Relative humidity: 10 - 95%, non condensing
  • Vibration:IEC 60068-2-6 (sinus shaped), IEC 60068-2-64 (broadband noise)
  • Shock: IEC 60068-2-27 (25G and 50G)
  • Weight: 
    sensing head 40 g
    electronics 420 g

Electrical Specifications

  • Output / analog: 0/4 - 20 mA, 0-5/10 V, thermocouple J, K, alarm
  • Output / alarm: 24 V / 50 mA (open collector)
  • Optional: relay: 2 x 60 V DC/42 V ACeff; 0.4 A; optically isolated
  • Output / digital (optional): USB, RS232, RS485 (optional), Modbus RTU, Profibus DP, Ethernet
  • Output impedances: 
    mA max. 500 Ω (with 8-36 V DC)
    mV min. 100 kΩ load impedance
    thermocouple 20 Ω
  • Inputs: programmable functional input for external emissivity setting /ambient temperature compensation, trigger (reset of hold functions)
  • Cable length: 3 m
  • Power supply: 8-36 V DC
  • Current draw: max. 100 mA

Versions

Part number: temperature range / spectral range / optics / max. ambient temperature / cable length

  • OPTCT3ML: 50-400°C / 2.3 μm / 22:1 / 85°C / 3 m cable
  • OPTCT3MH: 100-600°C / 2.3 μm / 33:1 / 85°C / 3 m cable
  • OPTCT3MH1: 150-1000°C / 2.3 μm / 75:1 / 85°C / 3 m cable
  • OPTCT3MH2: 200-1500°C / 2.3 μm / 75:1 / 85°C / 3 m cable
  • OPTCT3MH3: 250-1800°C / 2.3 μm / 75:1 / 85°C / 3 m cable