Optris CS LT15 Low Cost Infrared Pyrometers

The CS series of infrared temperature sensors are our lowest cost pyrometers and are ideal for a wide variety of applications given their wide measuring range and robust design. The stainless steel housing is just 12mm diameter x 87mm long and is supplied with a length of cable. The sensor output is selectable, either a scaleable 0-10V or a type K thermocouple output. Although low in cost, the sensors are packed with features and are easily configurable using the optional USB interface and Compact Connect software.

See why the CS LT15 represents such great value for money.

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


Temperature range: -40°C to 1030°C
Response time: 25 ms
Optical Resolution 15:1
Green LED alarm indication, aiming support, self diagnostic or temperature code indication
Usable up to 80°C ambient temperature without cooling
Several outputs: 0-10 V or 0-5 V free scaleable, type K thermocouple, alarm output or digital output
USB programming interface, direct serial 9.6 kBaud interface
Wide power range: 5-30 V DC

General Specifications

Environmental rating: IP 63
Ambient temperature: -20°C to 80°C
Storage temperature: -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: 58 g

Measurement Specifications

Temperature range: -40°C – 1030°C (scalable via software)
Spectral range: 8 – 14 μm
Optical resolution (90 % energy): 15:1
CF-lens (optional): 0.8 mm @ 10 mm
System accuracy: ± 1.5% or ± 1.5°C 1)
Repeatability: ± 0.75% or ± 0.75°C 1)
Temperature coefficient: ± 0.05 K/K or ± 0.05 %/K 3)
Temperature resolution: 0.1K 2)
Response time (90%): 25 ms (adjustable up to 999 s)
Emissivity/Gain : 0.100 – 1.100 (adjustable via 0-10 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) object temperature > 0°C; whichever is greater 2) at time constant 100 ms and TObj 25°C 3) for ambient temperatures <18°C and >28°C; whichever is greater

Electrical Specifications

Output/analogue: 0-5 V or 0-10 V free scalable, thermocouple type K or alarm with adjustable voltage levels
Output/alarm: 0-30V/50 mA (open collector)
3-state alarm output: adjustable threshold values and voltage level for: no alarm, pre-alarm, alarm
Output/digital: uni-/bidirectional, 9,6 kBaud, 0/3V digital level, USB optional
Input (0-10 V): Programmable functional input for external emissivity setting/ambient temperature adjustment, triggered signal output or peak-hold function
LED functions: alarm indication, automatic aiming support, self diagnostic, temperature indication (via. temp.code)
Cable length 1 m (standard), 3 m, 8 m, 15 m
Power supply: 5-30 V DC
Current draw: 4 mA (without LED)/10 mA

Optical Specifications

CS LT Optical Specifications

Interface Connections

CS LT Interface Connections

Dimensions & Accessories

CS LT Dimensions Accessories