The Optris CTlaser 3M is a two-part infrared thermometer working at 2.3 µm for metals and ceramics. Five versions cover 50 to 1800 °C, with double laser aiming, 1 ms exposure time, system accuracy ±(0.3 % of reading + 2 °C) and analog and optional digital outputs.
The Optris CTlaser 3M is a non-contact infrared thermometer for accurate temperature measurement of metals, secondary metal processing and ceramic materials. It consists of a compact sensing head and a separate electronics box with display and programming keys, connected by a 3 m standard cable (8 m and 15 m available).
Its short measuring wavelength of 2.3 µm reduces the error of temperature readings on surfaces with low or unknown emissivity. The double laser aiming marks the real spot location at any distance. Five versions cover the temperature range: 3ML (50 to 400 °C), 3MH (100 to 600 °C), 3MH1 (150 to 1000 °C), 3MH2 (200 to 1500 °C) and 3MH3 (250 to 1800 °C). The 3ML has an optical resolution of 60:1 and the 3MH 100:1, each with selectable focus (SF, CF1, CF2, CF3 and CF4 optics).
System accuracy is ± (0.3 % of reading + 2 °C) with 0.1 K digital resolution and an exposure time of 1 ms. The instrument has an environmental rating of IP 65 (NEMA-4) and is usable up to 85 °C ambient temperature without cooling. Outputs include 0/4 – 20 mA, 0 – 5/10 V and thermocouple J, K, with optional USB, RS232, RS485, CAN, Profibus DP or Ethernet interfaces.
| Manufacturer | Optris |
|---|---|
| Model | CTlaser 3M (versions 3ML, 3MH, 3MH1, 3MH2, 3MH3) |
| Temperature range | 50 to 400 °C (3ML); 100 to 600 °C (3MH); 150 to 1000 °C (3MH1); 200 to 1500 °C (3MH2); 250 to 1800 °C (3MH3); scalable via programming keys or software; T object > T sensing head + 25 °C; for 3MH1–3MH3 specification valid at T object ≥ start of range + 50 °C |
| Spectral range | 2.3 µm |
| Optical resolution (90 % energy) | 60:1 (3ML); 100:1 (3MH) |
| Optics 3MH (100:1), spot size @ distance | SF: 11 mm @ 1100 mm; CF1: 0.85 mm @ 85 mm; CF2: 1.5 mm @ 150 mm; CF3: 2 mm @ 200 mm; CF4: 4.5 mm @ 450 mm |
| Optics 3ML (60:1), spot size @ distance | SF: 18.3 mm @ 1100 mm; CF1: 1.4 mm @ 85 mm; CF2: 2.5 mm @ 150 mm; CF3: 3.4 mm @ 200 mm; CF4: 7.5 mm @ 450 mm |
| System accuracy | ± (0.3 % of reading + 2 °C) at ambient 23 ± 5 °C (ε = 1, response time 1 s) |
| Repeatability | ± (0.1 % of reading + 1 °C) at ambient 23 ± 5 °C |
| Temperature resolution (digital) | 0.1 K |
| Exposure time (90 % signal) | 1 ms (with dynamic adaptation at low signal levels) |
| Emissivity / Gain | 0.100 – 1.100 (adjustable via programming keys or software) |
| Transmissivity / Gain | 0.100 – 1.100 (adjustable via programming keys or software) |
| Signal processing | Peak hold, valley hold, average; extended hold function with threshold and hysteresis |
| Software | optris Compact Connect |
| Laser | 635 nm, 1 mW, ON/OFF via electronics box or software |
| Analog outputs | 0/4 – 20 mA, 0 – 5/10 V, thermocouple J, K |
| Alarm output | 24 V / 50 mA (open collector) |
| Optional relay | 2 × 60 V DC / 42 V AC eff; 0.4 A; optically isolated |
| Digital outputs (optional) | USB, RS232, RS485, CAN, Profibus DP, Ethernet |
| Output impedances | mA: max. 500 Ω (with 5 – 36 V DC); mV: min. 100 kΩ load impedance; thermocouple: 20 Ω |
| Inputs | Programmable functional inputs for external emissivity adjustment, ambient temperature compensation, trigger (reset of hold functions) |
| Cable length | 3 m (standard), 8 m, 15 m |
| Power supply | 8 – 36 V DC |
| Current draw | max. 160 mA |
| Environmental rating | IP 65 (NEMA-4) |
| Ambient temperature | -20 to 85 °C (sensing head; 50 °C with laser ON); 0 to 85 °C (electronics) |
| Storage temperature | -40 to 85 °C (sensing head); -40 to 85 °C (electronics) |
| Relative humidity | 10 – 95 %, non-condensing |
| Vibration (sensor) | IEC 68-2-6: 3 G, 11 – 200 Hz, any axis |
| Shock (sensor) | IEC 68-2-27: 50 G, 11 ms, any axis |
| Dimensions | Sensing head: length 100 mm, thread M48 × 1.5, Ø 55 mm; electronics (per drawing): width 110 mm (max. 120 mm overall), height 70 mm, depth 30 mm |
| Weight | 600 g (sensing head); 420 g (electronics) |
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