CTex LT

The Optris CT series pyrometer places safety at the forefront, particularly in hazardous environments. The explosion-proof version, CTex LT, is equipped with Zener double barriers, specially designed for areas prone to explosions. This feature ensures secure operation, adding an extra layer of protection for comprehensive remote temperature monitoring solutions. Additionally, the CT LTex sensing head can be passively installed in hazardous areas, further enhancing safety measures with energy limitation through approved Zener barriers (STAHL) for zone 1.

Featuring a two-piece design, the CT series incorporates one of the world’s smallest infrared sensors, offering an impressive optical resolution of up to 22:1 and a rapid exposure time as low as 150 ms. This design is optimized for efficient monitoring of fast-paced manufacturing processes across various industries. With a wide temperature range from -50 °C to 975 °C (122 °F to 1787 °F), suitable for non-reflective objects, the CTex LT series ensures versatility in temperature measurement applications.

The pyrometers exceptional temperature resistance enables seamless operation in ambient temperatures up to 180 °C (356 °F) without additional cooling, making it ideal for high-temperature environments. Its thermal shock-resistant design guarantees repeatability with ambient temperature changes, ensuring reliable performance even in challenging conditions. Manufactured to meet high-quality standards in Germany, these thermal sensors excel in demanding environments.

The Optris CT LTex series infrared sensors are designed for stability and accuracy over extended periods, making them essential tools for critical industrial processes. Their precise non-contact temperature measurement, facilitated by separate electronics, is complemented by easily accessible programming keys and an LCD interface. The stainless-steel housing enhances durability, ensuring reliable performance in diverse industrial settings.

The adaptability of the Optris CTex LT series is further highlighted by its range of analog and digital outputs, including various interfaces like USB, RS485, RS232, Profibus DP, ProfiNet, Ethernet, and Ethernet/IP. This adaptability ensures seamless integration into machinery, enhancing utility across various applications and providing users with versatility.

Optional accessories further enhance the functionality of the infrared sensor, catering to diverse industrial needs. From mounting forks for secure installation to sighting tubes for precision targeting and close-focus lenses for detailed measurements of small objects, these accessories expand the series’ capabilities. Additionally, air purge accessories safeguard the temperature sensor from contaminants, while cooling jackets optimize performance in elevated temperature conditions, ensuring consistent and accurate readings.

In summary, the Optris CTex LT series pyrometer combines precision, adaptability, and durability to facilitate non-contact temperature measurements across a wide range of industrial applications, ensuring reliability and efficiency even in the most 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?

It is recommended not to change the sensing cable length, as the cable’s impedance is part of the sensor calibration. However, in all CT LTex models, the sensing head cable can be shortened if absolutely 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 completely fill out the field of view of the optics. 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?

On 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. Inside a certain model group, any exchange of sensing heads and electronics is possible. Every head has a specific calibration code, which is printed on the head cable. For correct temperature measurement and sensor functionality, this calibration code must be stored in the electronic box.

Can I use the CT LTex as 2-wire sensor?

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

• CTex LT
• Aluminum housing with a mounting appliance for two Zener barriers and CT electronics
• 2x Zener barriers, type 9002/22-032-300-111
• 1x mounting nut
• CT Series Manual