Optris CT 4ML High Speed Infrared Temperature Sensor for Low Temperature Metals

Optris CT 4ML Infrared Pyrometer for High Speed applications and Low Temperature Metals

Optris CT 4ML Infrared Pyrometer for Low Temperature Metals

The Optris CT 4ML is a new innovation from the German manufacturer of infrared temperature sensors and now allows precise measurement of metals at temperatures starting from 0°C and rising to 500°C. The short wavelength sensitivity of the sensor makes it suitable for metals, metal oxides, ceramics and other materials with unknown or changing emissivity.

Categories: Compact Series, Infrared Temperature Sensor for Metals Applications

An additional advantage is the extremely fast response time of just 300μs, making this our fastest sensor and therefore ideal for high speed processes.

The sensor has the smallest sensing head available in the world at just 14mm diameter x 28mm long and allows the sensor to be installed in the applications where space is at a premium. The separate electronics enclosure provides a full range of outputs and inputs as standard including Voltage, mA and Thermocouple. It is also possible to incorporate an interface card which provides simple integration into your existing process control equipment. Options include Ethernet, Profibus, RS485. A USB interface is included as standard and can be used with PC based Compact Connect software or our IRMobile android app.

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

Data Sheet Application Story

Features

Miniaturised Infrared Thermometer with 2.2 to 6.0 μm wavelength 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 long fits anywhere and is usable up to 70°C ambient temperature without cooling.
For measurements on metal surfaces with a very low start temperature of 0°C up to 500°C.
Measuring spot sizes up from 5mm.
Response time 300 µs.
Short measuring wavelength reduces error of temperature readings on surfaces with low or unknown emissivity.
High flexibility through selectable analogue outputs or various digital interfaces at the electronic box.

Measurement Specifications

Temperature range (scalable via programming keys or software): 0°C … 500°C (4ML)
Spectral range: 2.2 µm – 6.0 µm
Optical resolution (90% energy): 10:1
System accuracy¹⁾ (at ambient temperature 23 ± 5°C): ± (0.3% of reading + 2°C)
Repeatability (at ambient temperature 23 ± 5°C): ± (0.1% of reading + 1°C)
NETD²⁾: 120 mK
Temperature coefficient³⁾: ±0.05 K/ K or ±0.03 %/ K
Exposure time³⁾: 90 μs
Response time: 300 μs (90 %)
Emissivity / Gain (adjustable via programming keys or software): 0.100 – 1.100
Transmissivity / Gain (adjustable via programming keys or software): 0.100 – 1.100
Signal processing (parameter adjustable via programming keys or software, respectively): Peak hold, valley hold, peak picker, average; extended hold function with threshold and hysteresis.

General Specifications

Environmental rating: IP 65 (NEMA-4)
Ambient temperature: sensing head: 0 °C … 70 °C, electronics: 0 °C … 70 °C
Storage temperature: sensing head: – 40 °C … 85 °C, electronics: – 40 °C … 85 °C
Relative humidity: 10 – 95%, non condensing
Vibration: IEC 60068-2-6 / -64
Shock: IEC 60068-2-27 (25 G and 50 G)
Weight: sensing head 40 g, electronics 420 g

Electrical Specifications

Output / analogue: 0/4 – 20 mA, 0-5/10 V, thermocouple K, alarm
Output / alarm: 24 V / 50 mA (open collector)
Optional: relay: 2 x 60 V DC/42 V AC_eff; 0.4 A; optically isolated
Output / digital (optional): built-in USB-interface, RS232, RS485, Ethernet
Output impedances: mA max. 500 Ω, mV min. 100 kΩ load impedance, thermocouple 20 Ω
Inputs: programmable functional input for external emissivity setting /ambient temperature compensation, trigger (reset of hold functions)
Cable length: 3 m, 8 m, 15 m
Power supply: 8-30 V DC / 5 V USB / max. 1.2 W