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Optris CSlaser LT Infrared Pyrometer

The Optris CSlaser series of sensors are the lowest cost in our range of infrared pyrometers. All sensors in the range have our innovative dual laser aiming system which gives the user both the position of the measurement and also its size. The lasers are factory configured to match the optics of the sensor. The CSlaser sensor and electronics are housed in one convenient housing and connected to your instrumentation by standard cable. Emissivity is adjusted easily via two switches in the back of sensor accessed by four screws.

Take a look at what makes the CSlaser LT such a great infrared pyrometer.

The Optris CSlaser LT model is an ideal sensor for general purpose temperature measurement of many materials where extremely precise aiming is required. A selection of optics allow measuring spot sizes to be as small as 1.4mm with the CF1 selection. Alternatively the SF optics with an optical resolution of 50:1 give moderate spot sizes at further distances. The Optris CSlaser LT sensor has a wide measuring range of -30 to +1000°C and an industry standard 4-20mA output. It is also easy to connect our innovative USB interface which allows simple configuration and on screen measurement with the included Compact Connect Windows software.

Calibration as well as a full range of accessories are available for the Optris High Performance infrared pyrometers.


Temperature range from -30°C to 1000°C, measuring spots up from 1,4 mm and response times up from 150 ms
Single-piece, robust design for easy installation into your process system
Standard two-wire interface for reliable data transfer and easy integration into a PLC
Innovative double-laser sighting for exact marking of measurement targets
Fast sensor configuration and real-time measurement via USB
Dependable performance in ambient temperatures up to 85°C without additional cooling
Wide power range: 5-28 V DC

General Specifications

Environmental rating: IP 65 (NEMA-4) front mountable in vacuum processes (up to 10-3 mbar)
Ambient temperature: -20°C to 85°C (50°C with laser ON)
Storage temperature: -40°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: 600g

Measurement Specifications

Temperature range: -30 to 1000°C
Spectral range: 8 – 14 μm
Optical resolution (90 % energy): 50:1
System accuracy: ± 1% or ± 1°C at ambient temperature (1)
Repeatability: ± 0.5% or ± 0.5°C at ambient temperature (1)
Temperature resolution: 0.1°C
Response time (95%): 150ms
Emissivity/Gain : 0.100 – 1.100 (adjustable via 0-5 V DC input or software)
Transmissivity : 0.100 – 1.100 (adjustable via software)
Signal processing: peak hold, valley hold, average; extended hold function with threshold and hysteresis
Software: optris Compact Connect

1) whichever is greater

Electrical Specifications


Output/analogue: 4-20 mA
Loop resistance: max. 1000 Ω (1)
Output / alarm: 0 – 30 V / 500 mA (open-collector)
Output/ digital: uni-/ bidirectional, 9,6 kBaud, 0/3 V Pegel, USB optional
Cable length: 3 m / 8 m / 15 m (connector version only)
Current draw (laser): 45 mA at 5 V 20 mA at 12 V 12 mA at 24 V
Power supply: 5 – 28 V DC

1) Independent of supply voltage

Information Video

Optical Specifications