CT 4M

The Optris CT 4M is a dynamic non-contact solution for temperature measurement, particularly adept at handling challenging materials in low-temperature environments. The pyrometers unique mid-wavelength spectrum makes it an excellent choice for fast and low-temperature measurements across various materials, effectively addressing the challenges faced by LT sensors.

At its core, the Optris CT 4M features an InAsSb detector operating within the 2.2 μm – 6 μm range. This wavelength range renders the infrared sensor suitable for measuring metals, metal oxides, ceramics, or materials with unknown or changing emissivity. Designed for high-speed temperature measurement, CT 4M covers a temperature span from 0 °C to 500 °C (32 °F to 932 °F).

Key features of the Optris CT 4M include a miniaturized infrared thermometer with an ultra-fast exposure time of 90 µs and response times as quick as 300 µs. The pyrometers compact design, with a small head measuring 14 mm (0.6-inch) in diameter and 28 mm (1.1-inch) in length, ensures versatility, fitting into various spaces and capable of operating in temperatures of up to 70 °C (158 °F). Cooling with Optris accessories is advised for higher operating temperatures. Additionally, its distance-to-spot size ratio, supporting up to 10:1, and compact size make this infrared thermometer an ideal choice for integration into machinery and manufacturing equipment. The IR sensors rapid response time enables the monitoring of fast processes, facilitating quick measurements in industrial processes with low cycle times.

The Optris CT 4M adopts a two-piece sensor design with a measuring head and a separate electronic box, prioritizing accuracy and versatility. The electronic box simplifies device configuration and offers various interface options, including analog and digital outputs such as 0/4 – 20 mA, 0 – 5 V, 0 – 10 V, thermocouple (type K or J), USB, RS485, RS232 interfaces, relay outputs (2 x optically isolated), Profibus DP, ProfiNet, and Ethernet, Ethernet/IP. Whether utilized in laboratory, factory, or field settings, the Optris CT 4M facilitates precise temperature measurements effortlessly.

The compact sensing head, measuring 14 mm (0.6-inch) in diameter and 28 mm in length, can withstand ambient temperatures of up to 70 °C (158 °F). Optional accessories further enhance the functionality of the infrared sensor, catering to diverse industrial requirements. The mounting fork ensures secure and stable installation for continuous temperature monitoring, while the sighting tube enhances targeting precision and accuracy. The close-focus lens allows for detailed temperature measurements on small or distant objects, and the air purge accessory protects the temperature sensor from contaminants in harsh environments. Cooling jackets optimize performance in elevated temperature conditions, ensuring consistent and accurate readings. These optional accessories broaden the versatility of the Optris CT 4M series, providing tailored solutions for various industrial applications.

The Optris CompactPlus Connect software is a comprehensive tool for temperature measurement and analysis in industrial and research environments utilizing Optris infrared pyrometers. It provides a user-friendly interface facilitating smooth communication with Optris pyrometers.Enhancing the capabilities of Optris fixed infrared pyrometers, the CompactPlus Connect software extends beyond basic temperature measurement, offering various monitoring, analysis, and control features. These include visualizing temperature trends with temperature-time diagrams and documentation. Notably, it enables advanced data analysis, data logging, automatic process controls, parameterization of the pyrometer via configuration settings, and programming of outputs and inputs. Additionally, it offers advanced signal-processing functionalities.Overall, the Optris CompactPlus Connect software offers a robust solution for thermal measurement applications, providing versatility, efficiency, and ease of use for professionals in diverse industries. CompactPlus Connect
The Optris IR mobile allows users to set up and commission an Optris infrared pyrometer or infrared camera with an Android smartphone or tablet. This tool becomes handy for commissioning and aligning the infrared cameras field of view or adjusting the configuration. The app analyzes the connected infrared cameras live infrared image stream with auto hot and cold spot detection. For pyrometers, a temperature-time diagram or the video signal is displayed. This app works on most Android devices running 5.0+ with a USB port supporting USB-OTG (On The Go). Google Play

Can I shorten the cable between the sensor head and the electronics box?

On the model CT 4M, the sensing head cable can be shortened by max. 3 m (9.8 ft)

What distance-to-spot size ratio is correct for the application?

The measuring object’s size and the infrared thermometers optical resolution determine the maximum distance between the sensing head and the measuring object. To prevent measuring errors, the object should fill out the optics field of view. Consequently, the spot should always be at least the same size as the object or should be smaller than that.

Which changes have to be selected if an external close-focus lens is used?

The optional CF lens allows the measurement of small objects. If the CF lens is used, the transmission has to be set to 0.93. The assigned transmission (average value) is a characteristic value that may have a certain scattering. If required, the transmission has to be determined experimentally.

How can I improve the noise amplitude of the sensor?

In the CT models, the head cable must not be moved during the measurement. Use shielded cables only. The sensor shield has to be grounded. Avoid ground loops and related signal interferences in industrial environments. It might be necessary to interrupt the ground connections inside the electronics box. To do this, switch the jumper inside the electronics box to another position. Review the manual.

How do I exchange the sensor head?

From the factory side, the sensing head has already been connected to the electronics and the calibration code has been entered. Any exchange of sensing heads and electronics is possible inside a certain model group. Every head has a specific calibration code, which is printed on the head cable. This calibration code must be stored in the electronic box for correct temperature measurement and sensor functionality.

Can I use the CT 4M as a 2-wire sensor?

Please do not connect a supply voltage to the analog outputs, as this will destroy the output. The CT 4M is not a 2-wire sensor. Please review the CSmicro series, as this is a two-wire sensor.

• CT 4M with 3 m (9.8 ft) cable
• 1x mounting nut
• CT Series Manual