CT LT

The Optris CT LT series pyrometers are equipped with one of the world’s smallest infrared sensing heads, boasting a high optical resolution of up to 22:1. Utilizing a thermopile as a detector and operating within a spectral bandwidth of 8-14µm, these pyrometers excel in infrared measurement of high-emissivity targets, even at low object temperatures, in fixed installed situations.

Featuring a separate control box offering high variability with selectable analog outputs and several digital interfaces, the CT LT sensors present unique advantages for installation in applications with high surrounding temperatures. Their robust and ambitious design allows the sensing heads to withstand temperatures up to 180 °C without additional cooling, making these pyrometers ideal for high-temperature environments.

The Optris CT LT series sets the industrial standard for non-contact temperature measurement, prioritizing precision and speed. With a two-piece design incorporating one of the smallest infrared sensors globally, a commendable optical resolution of up to 22:1, and a rapid exposure time of down to 150 ms, these pyrometers are optimized for efficient monitoring of fast-paced manufacturing processes across industries. Their wide temperature range from -50 °C to 975 °C suits non-reflecting objects.

Exceptional temperature resistance characterizes the pyrometers’ capabilities, enabling seamless operation in ambient temperatures up to 180 °C without supplementary cooling. Their distinctive thermal shock-resistant design ensures repeatability with ambient temperature changes, meeting high-quality standards engineered and manufactured in Germany.

Designed for fixed installation, the Optris CT LT series provides a permanent and reliable solution for continuous temperature monitoring. Its precise non-contact temperature measurement facilitated by separate electronics, with easily accessible programming keys and an LCD interface, ensures stability and accuracy over extended periods in varied industrial settings.

The adaptability of the Optris CT LT series is further emphasized by the range of analog and digital outputs provided by the electronics box, including 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. This adaptability facilitates seamless integration into machinery, enhancing utility across various applications.

Optional accessories tailored to diverse industrial needs further enhance the functionality of the infrared sensor. The mounting fork ensures secure and stable installation, while the sighting tube improves targeting and accuracy. The close-focus lens enables detailed temperature measurements on small or distant objects, and the air purge accessory safeguards the temperature sensor from contaminants in harsh environments. Cooling jackets optimize performance in elevated temperature conditions, ensuring consistent and accurate readings.

In summary, the Optris CT LT series pyrometers combine precision, adaptability, and durability to facilitate non-contact temperature measurements across diverse industrial applications, offering reliability and efficiency in challenging conditions.

The Optris CompactConnect software improves the functionalities of Optris fixed infrared pyrometers, offering various monitoring, analysis, and control features beyond basic temperature measurement. It includes features like visualizing temperature trends with temperature-time diagrams and documentation. The software enables data logging, automatic process controls, parameterization of the pyrometer via configuration settings, and setting up programmable outputs and inputs. Additionally, it provides advanced signal-processing functionalities. Compact 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?

Not changing the sensing cable length is recommended, as the cable’s impedance is part of the sensor calibration. However, in all CT LT models, the sensing head cable can be shortened if necessary. Shortening the cable will cause an additional measuring error of about 0,1 K/m.

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 0.78. 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 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 LT as a 2-wire sensor?

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

• CT LT with 1m cable
• 1x mounting nut
• CT Series Manual