CTi LT
Compact Two-piece Industrial Infrared Pyrometer
Price on request
The Optris CTi LT series pyrometers feature one of the smallest infrared sensing heads in the world, with an optical resolution of up to 22:1 and a spectral bandwidth of 8-14µm.
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The Optris CTi LT series pyrometers feature one of the world's smallest infrared sensing heads with an optical resolution of up to 22:1 and a spectral bandwidth of 8-14µm, ideal for high-emissivity targets even at low temperatures. With a wide temperature range from -50 °C to 1050 °C, the CTi LT pyrometers excel in non-reflecting object measurement. Their robust design allows operation up to 180 °C without additional cooling, making them optimal for high-temperature environments. Engineered in Germany, they offer precise non-contact temperature measurement with analog and digital outputs for seamless integration into machinery. Optional accessories, including mounting fork, sighting tube, close-focus lens, air purge, enhance functionality, ensuring versatility across industrial applications.
Features
• Temperature range: -50 °C to 1050 °C
• Spectral range: 8 to 14 µm
• Response time: 115 ms (90% Energy)
• High ambient temperature rating up to 180 °C
• Higher Distance-to-spot size ratio of up to 22:1
• Unique thermal shock-resistant design for best repeatability and accuracy -
General Specifications Environmental rating IP 65 (NEMA-4) Ambient temperature1) –20 °C ... 180 °C (120°C for LT02) (sensing head)
–20 °C ... 85 °C (electronics)Storage temperature –40 °C ... 180 °C (120°C for LT02) (sensing head)
–40 °C ... 85 °C (electronics)Operating air humidity range 10 – 95 %, non condensing Vibration (sensor) IEC 60068-2-6 (sinus shaped)
IEC 60068-2-64 (broadband noise)Shock (sensor) IEC 60068-2-27 (25G and 50 G) Weight 40 g (sensing head) / 420 g (electronics) Electrical SpecificationsOutput / analog0 / 4 – 20 mA, 0 – 5 / 10 V, thermocouple K, alarmOutput / alarm24 V / 50 mA (open collector)Relay outputs (optional)2 x 60 V DC/ 42 V ACrms; 0.4 A; optically isolatedDigital interfacesbuilt-in USB-interface,
Optional: EtherNet/IP, Profinet, Ethernet TCP/IP/ Modbus TCP, Modbus RTU, RS485, RS232 or relay outputs (2 x optically isolated)Output impedancesmA max. 500 Ω (with 8 – 36 V DC)
mV min. 100 kΩ load impedance
thermocouple 20 ΩI/O Pins (3x)flexible programming as in- or output:
external emissivity adjustment, ambient temperature
compensation, uncommitted value, trigger
(reset of hold functions), alarm output (open
collector 24 V/ 50 mA)Cable length1 m (standard), 3 m, 8 m, 15 mPower Supply8 – 36 V DC / 1.2WMeasurement specificationsMeasuring Temperature range
(scalable via programming keys or software / App)-50 °C … 650 °C (LT02)
-50 °C … 800 °C (LT15)
-50 °C … 1050 °C (LT22)Spectral range8 – 14 μmOptical resolution (90 % energy)22:1
15:1
2:1Smallest spot size0.6 mm @ 10 mm (with LT22 + CF lens)Measurement uncertainty 2), 3), 4), 5), 7)±1 % or ±1 °CRepeatability2), 3), 4), 5), 7)±0.2 °C or ± 0.1 % (LT02)
±0.1 °C or ± 0.1 % (LT15)
±0.15 °C or ± 0.1 % (LT22)Temperature resolution (display)0.1 KNETD (typically) 4), 5), 6), 7)25 mK (LT 02 & LT 15)
35 mK (LT 22)Response time (90%)40 ms (LT02)
115 ms (LT15 & LT22)Emissivity/ Gain
(adjustable via programming keys or software / App)0.05 – 1.100Transmissivity/ Gain
(adjustable via programming keys or software / App)0.05 – 1.100 Signal processing (parameter adjustable via programming keys or software / App)Peak hold, valley hold, average; extended hold function with threshold and hysteresisSoftware / AppOptris CompactPlus Connect / IR Mobile App1) The LCD displays capacity may be limited at ambient temperatures below 0 °C
2) Whichever is greater
3) T obj >0 °C
4) ε = 1
5) Response time = 200ms
6) T obj = 25 °C
7) at ambient temperature 23 ± 5 °C -
Documents:
Filename Upload date Size Optris CTi LT Datasheet 2025.11.28 0.8 MB Optris CTi LT Manual 2025.11.28 2.3 MB