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
  (-58 °F ... 1787 °F)
  
• Spectral range: 8 to 14 µm
• Response time: 150 ms
• Starting at $295
  

Technical Details of the optris CT LT

Measurement Specifications

• Temperature range (scalable via software): 
  -50°C ... 975°C (-58 °F ... 1787 °F) (LT22)
  -50°C ... 600°C (-58 °F ... 1112 °F) (LT15)
  -50°C ... 600°C (-58 °F ... 1112 °F) (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 (0.02 in @ 0.39 in) (LT22)
  0.8 mm @ 10 mm (0.03 in @ 0.39 in) (LT15)
  2.5 mm @ 23 mm (0.10 in @ 0.91 in) (LT02)
• System accuracy¹⁾²⁾ (at ambient temperature 23 ± 5°C [73.4 ±9°F]):
   ± 1% or ± 1 °C ^{(1.8 °F)}
  
• Repeatability¹⁾²⁾ (at ambient temperature 23 ± 5°C [73.4 ±9 °F]):
   ± 0.5% or ± 0.5°C ^{(0.9 °F)}
• Temperature resolution (display): 0.1 K
  
• 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 ... 180°C (-4 °F ... 356 °F)
  (130°C [266 °F] at LT02)
  electronics:
  0°C to 85°C (32 °F ... 185 °F)⁴⁾
  
• Storage temperature: 
  sensing head:
  -40 ... 180°C (-40 °F ... 356 °F)
  (130°C [266 °F] at LT02)
  electronics:
  -40°C ... 85°C (-40 °F ... 185 °F)
  
• Relative humidity: 10 - 95 %, non condensing
• Shock: IEC 60068-2-27 (25 G and 50 G)
  
• Vibration:
  • IEC 60068-2-6 (sinus shaped)
  • IEC 60068-2-64 (broadband noise)
• Weight: 
  sensing head: 40 g (1.4 oz)
  electronics: 420 g (14.8 oz)
  

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 [-4 °F ... 356 °F] 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 AC_eff; 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:
  1 m (standard), 3 m, 8 m, 15 m (3.3 ft [standard], 9.8 ft, 26.2 ft, 49.2 ft)
  
• 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 (-58 °F ... 1112 °F) / 8-14 μm / 2:1 /
  130°C (266 °F) / 1 m (3.3 ft) cable
• OPTCTLT15: -50 ... 600 °C (-58 °F ... 1112 °F) / 8-14 μm / 15:1 /
  180°C (356 °F) / 1 m (3.3 ft) cable
• OPTCTLT15CF: -50 ... 600 °C (-58 °F ... 1112 °F) / 8-14 μm / 15:1 /
  180°C (356 °F) / 1 m (3.3 ft) cable;
  with CF optics: 3 mm @ 50 mm (0.12 in @ 1.97 in) (head length: 32 mm [1.26 in])
• OPTCTLT20: -50-975 °C (-58 °F ... 1787 °F) / 8-14 μm / 22:1 /
  180°C (356 °F) / 1 m (3.3 ft) cable
• OPTCTLT20CF: -50 ... 975 °C (-58 °F ... 1787 °F) / 8-14 μm / 22:1 /
  180°C (356 °F) / 1 m (3.3 ft) cable;
  with CF optics: 2.5 mm @ 50 mm (0.10 in @ 1.97 in) (head length: 32 mm [1.26 in])

¹⁾ whichever is greater
²⁾ at object temperatures > 0°C (32 °F), Ɛ = 1
³⁾ at time constant 200 ms and T_Obj 25°C (77 °F)
⁴⁾ The LCD displays capacity may be limited at ambient temperatures below 0 °C (32 °F).

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 (356 °F) 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 (248 °F).

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 CT 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.

Additional downloads (manuals and STEP files) for the pyrometers of the compact series

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.