Infrared thermometers and thermal imagers - Optris products
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optris CT LT / CTex LT

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  • Overview
  • Technical details
  • Applications
  • Datasheets & manuals
  • Software

Pyrometers optris CT LT and CTex LT

The pyrometer optris CT LT is equipped with one of the world’s smallest infrared sensors with a high optic resolution of 22:1. Additionally, it offers a high variability due to selectable analog outputs as well as several digital interfaces in the electronics box.

The extended version, the pyrometer CTex LT, is additionally equipped with Zener double barriers (for employment in explosion-prone areas).

Important Specifications

  • Temperature range:
    -50°C to 975°C
  • Spectral range: 8 to 14 µm
  • Response time: 150 ms
  • Price starts from 225,- Euro (plus VAT)

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Technical Details of the optris CT LT

 

Measurement Specifications

 

  • Temperature range (scalable via software): 
    -50°C to 975°C (LT22)
    -50°C to 600°C (LT15)
    -50°C to 600°C (LT02)
  • Spectral range: 8 to 14 µm
  • Optical resolution (90% energy): 
    22:1 (precision glass optics)
    15:1 (precision glass optics)
    2:1 (with fl at front window)
  • CF-lens (optional): 
    0.6 mm @ 10 mm (LT22)
    0.8 mm @ 10 mm (LT15)
    2.5 mm @ 23 mm (LT02)
  • System accuracy1)2) (at ambient temperature 23 ± 5°C): ± 1% or ± 1°C
  • Repeatability1)2) (at ambient temperature 23 ± 5°C): ± 0.5% or ± 0.5°C
  • Temperature resolution (display): 0.1°C
  • NETD2)3)
    0.05 K (LT22/LT15)
    0.1 K (LT02)
  • Response time (95%): 150 ms
  • Emissivity / Gain (adjustable via programming keys or software): 0.100 - 1.100
  • Transmissivity (adjustable via programming keys or software): 0.100 - 1.100
  • Signal processing (parameter adjustable via software): 
    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 to 180°C (130°C at LT02)
    electronics: 0°C to 85°C
  • Storage temperature: 
    sensing head: -40 to 180°C (130°C at LT02)
    electronics: -20°C to 85°C
  • Relative humidity: 10 - 95%, non condensing
  • Vibration: IEC 68-2-6: 3 G, 11-200 Hz, any axis
  • Shock: IEC 68-2-27: 50 G, 11 ms, any axis
  • Weight: 
    sensing head 40 g
    electronics 420 g

 

Electrical Specifications

 

  • Output / analog: 
    channel 1: 0/4 - 20 mA, 0-5/10 V, thermocouple J, K
    channel 2: sensind head temperature (-20°C - 180°C as 0-5 V or 0-10 V), alarm output
  • 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), CAN-Bus, 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: 1 m (standard), 3 m, 8 m, 15 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

  • OPTCTLT02: -50-600 °C / 8-14 μm / 2:1 / 130°C / 1 m cable
  • OPTCTLT15: -50-600 °C / 8-14 μm / 15:1 / 180°C / 1 m cable
  • OPTCTLT15CF: -50-600 °C / 8-14 μm / 15:1 / 180°C / 1 m cable; with CF optics: 3 mm @ 50 mm (head length: 32 mm)
  • OPTCTLT20: -50-975 °C / 8-14 μm / 22:1 / 180°C / 1 m cable
  • OPTCTLT20CF: -50-975 °C / 8-14 μm / 22:1 / 180°C / 1 m cable; with CF optics: 2.5 mm @ 50 mm (head length: 32 mm)

1) whichever is greater
2) at object temperatures > 0°C, Ɛ = 1
3) at time constant 200 ms and TObj 25°C

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Areas of application for the pyrometer optris CT LT

The pyrometer optris CT LT has been designed for measurement of non-metallic surfaces.
Since the IR thermometer offers a temperature resistance of up to 180°C without cooling, it is ideally suited for e.g. surveillance of surface temperatures during lamination processes in vehicle interiors, which take place in temperatures of about 120°C.

In the plastics industry, the pyrometer works perfectly for temperature regulation during thermoforming of foils, where it monitors defined measurement points.

Are you a producer of circuit boards? If so, you should employ the optris CSmicro 2W LT for function tests of equipped circuit boards. It registers the thermic behavior of circuit boards touchless and in no time while not influencing delicate measuring objects.

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Infrared software optris Compact Connect included

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.    

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