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CT 3M

Product catalog summary

Overview: The optris® CT 3M is a miniaturized infrared thermometer designed for precise non-contact temperature measurement of metals, secondary metal processing, metal oxides, and ceramic materials. It operates within a temperature range of 50 °C to 1800 °C and features a short wavelength of 2.3 μm to minimize errors in emissivity.

Key Features:

Compact sensing head (14 mm diameter, 28 mm length) suitable for environments up to 85 °C without cooling.
Temperature measurement ranges from 50 °C to 1800 °C with exposure times starting from 1 ms.
Adjustable emissivity and transmissivity settings (0.100 – 1.100).
Signal processing includes peak hold, valley hold, average, and extended hold functions.

Measurement Specifications:

Temperature ranges: 50 °C to 1800 °C, scalable via programming keys or software.
Spectral range: 2.3 μm.
Optical resolution varies from 22:1 to 75:1 depending on the model.
System accuracy: ±(0.3 % of reading +2 °C) at ambient temperature 23 ±5 °C.
Repeatability: ±(0.1 % of reading +1 °C).
Temperature resolution: 0.1 K.

General Specifications:

Environmental rating: IP 65 (NEMA-4).
Ambient temperature range: –20 °C to 85 °C for the sensing head.
Storage temperature: –40 °C to 125 °C for the sensing head.
Relative humidity: 10 – 95 %, non-condensing.
Vibration and shock resistance: IEC 68-2-6 and IEC 68-2-27 standards.

Electrical Specifications:

Outputs: Analog (0/4 – 20 mA, 0 – 5/10 V, thermocouple J, K, alarm), Digital (USB, RS232, RS485, CAN, Profibus DP, Ethernet optional).
Power supply: 8 – 36 V DC, max current draw 100 mA.

Optical Specifications:

Various optics configurations with different distance-to-spot ratios (D:S) for specific applications.

Accessories: Includes CF lens, mounting brackets, and air purge collars for enhanced functionality.

Catalog excerpts

optris® CT 3M TECHNICAL DATA Precise non-contact temperature measurement of metal from 50 °C to 1800 °C Features: • Miniaturized Infrared Thermometer with 2.3 μm wave length range for measurements of metals, of secondary metal processing, metal oxides and ceramic materials • Very small sensing head of 14 mm diameter and 28 mm length fits everywhere and is usable up to 85 °C ambient temperature without cooling • emperature measuring ranges from 50 °C to 1800 °C and exposure times T starting from 1 ms • Short wave length range of 2.3 μm to reduce error of reasding with measurements on materials with unknown emissivity Measurement Specifications Temperature ranges (scalable via programming keys or software)1) Spectral ranges General Specifications Optical resolution (90 % energy) Environmental rating Ambient temperature –20 °C ... 85 °C (sensing head) 0 °C ... 85 °C (electronics) Storage temperature – 40 °C ... 125 °C (sensing head) – 40 °C ... 85 °C (electronics) System accuracy2) (at ambient temp. 23 ±5 °C) Relative humidity Vibration (sensor) Repeatability (at ambient temp. 23 ± 5 °C) Shock (sensor) Temperature resolution 40 g (sensing head) 420 g (electronics) Emissivity / Gain (adjustable via programming keys or software) Transmissivity / Gain (adjustable via programming keys or software) Signal processing (parameter adjustable via programming keys or software, respectively) Peak hold, valley hold, average; extended hold function with threshold and hysteresis optris® Compact Connect Electrical Specifications Outputs / analog Relay: 2 x 60 V DC/ 42 V ACeff; 0.4 A; optically isolated USB, RS232, RS485, CAN, Profibus DP, Ethernet (optional) Output impedances mA max. 500 Ω (with 8 – 36 V DC) mV min. 100 kΩ load impedance thermocouple 20 Ω Programmable functional inputs for external emissivity adjustment, ambient temperature compensation, trigger (reset of hold functions) Cable length Current draw Power Supply Tobject >Tsensing head +25 °C ε = 1, response time 1 s 3) With dynamic adaptation at low signal levels 4) Specification valid at T object ≥ start of measurement range +50 °C 1) Optris GmbH · Ferdinand-Buisso

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Optical Specifications Optics CT 3ML SF, D:S = 22:1 Dimensions Electronics Messkopf (built-in CF lense) Accessories (examples) CF-Vorsatzlinse (ACCTCF) Montagewinkel, fest (ACCTFB) Freiblasvorsatz mit integrierter CF-Vorsatzlinse (ACCTAPLCF) Specifications are subject to change without notice · CT 3M-EN2018-07-A Sensing head

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