CTi LThot
Compact Two-piece Industrial Infrared Pyrometer with high operating temperature range
Price on request
The Optris CTi LThot pyromter shines in very high-temperature environments, offering exceptional temperature resistance of the sensing head.
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The Optris CTi LThot pyromter shines in very high-temperature environments, offering exceptional temperature resistance of the sensing head, allowing operation in ambient temperatures of up to 250 °C without additional cooling. This elevated temperature rating makes it suitable for various applications, including dryers, furnaces, heat-treating processes of plastics and textiles processing, and semiconductor production. The infrared pyromter CTi LThot with temperature measurement capabilities ranging from –50 °C to 1050 °C and selectable optical options is robust and durable due to its compact stainless steel housing. The infrared thermometer series sets an industrial standard for non-contact temperature measurement, emphasizing precision and speed, with optional accessories enhancing functionality for harsh environment industrial scenarios.
Features• Temperature range: -50 °C to 1050 °C
• Spectral range: 8 to 14 µm
• Response time: down to 40 ms
• High operating temperature rating up to 250 °C -
General Specifications Environmental rating IP 65 (NEMA-4) Ambient temperature1) –20 °C ... 250 °C (sensing head)
–20 °C ... 85 °C (electronics)Storage temperature –40 °C ... 250 °C (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 200 g (sensing head incl. massive housing) / 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 … 1050 °CSpectral range8 – 14 μmOptical resolution (90 % energy)2:1
10:1Smallest spot size3.0 mm @ 30 mm (LThot 10:1 CF1 lens)Measurement uncertainty 2), 3), 4), 5), 7)±1 % or ±1.5 °CRepeatability2), 3), 4), 5), 7)±0.13 °C or ±0.1 % (LThot 2:1)
±0.16 °C or ±0.1 % (LThot 10:1)Temperature resolution (display)0.1 KNETD (typically) 4), 5), 6), 7)37 mK (LThot 2:1)
45 mK (LThot 10:1)Response time (90%)45 ms (LThot 2:1)
40 ms (LThot 10:1)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 LThot Datasheet 2025.11.28 0.8 MB Optris CTi LThot Manual 2025.11.28 0.5 MB