optris CTex LT — Infrared Temperature Sensor for Hazardous Areas

Where safety is non-negotiable, the Optris CTex LT series pyrometer delivers uncompromising precision and certified protection. Specifically engineered for deployment in explosion-prone environments (ATEX/IECEx zones), this robust infrared sensor eliminates risks by integrating intrinsic safety through built-in Zener barriers. It ensures secure, reliable operation in hazardous areas where standard sensors cannot be installed, providing peace of mind for your most critical processes.
The CTex LT inherits the superior optical performance of the standard CT LT series. Featuring a spectral range of 8‑14 µm, it is ideally suited for measuring materials with high emissivity, such as plastics, coatings, textiles, and food products. With a wide temperature measurement range from -50 °C to 975 °C and a high optical resolution (distance-to-spot ratio) of up to 22:1, it guarantees accurate readings even on small or distant targets. The sensor head is rated for ambient temperatures up to 180 °C, ensuring stability in harsh conditions.
Flexibility in integration is a key strength. The pyrometer supports various analog and digital outputs, including industry-standard protocols, like Modbus RTU, Modbus TCP, Profinet, and EtherNet/IP. Configuration is straightforward and license-free using the compactConnect PC software or the IR mobile App for Android devices. A range of accessory lenses enables optimization for any installation, while options such as air purge units and cooling housings maintain performance in demanding environments.
Developed, calibrated, and quality-tested in Germany, the Optris CTex LT series combines certified safety with German engineering excellence—forming a trustworthy, high-precision solution for safe remote temperature monitoring in hazardous locations worldwide.

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, 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 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 a wide range of analog and digital outputs, including 0/4 – 20 mA, 0 – 5 V, 0 – 10 V, USB, RS485, RS232 interface, relay outputs (2 x optically isolated), Profibus DP, Modbus RTU, Modbus TCP, Profinet, 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.