optris CTi LT — Compact Infrared Temperature Sensor

Engineered in Germany for uncompromising reliability, the Optris CTi LT series represents a breakthrough in compact, high-performance infrared temperature measurement. These pyrometers integrate one of the world’s smallest sensing heads with robust industrial capabilities, delivering precise non-contact temperature monitoring for even the most challenging applications.
At the heart of the CTi LT is its superior 8–14 µm spectral bandwidth, optimized for measuring high-emissivity materials and low-temperature targets with exceptional accuracy. With an extensive measurement range from -50 °C to 1050 °C, it is ideally suited for non-reflecting objects across diverse industrial processes. Its outstanding optical resolution of up to 22:1 ensures accurate readings of small or distant targets, minimizing background interference.
Built to endure harsh conditions, the CTi LT operates reliably at ambient temperatures up to 180 °C without external cooling, thanks to its unique thermal-shock-resistant design. This robustness guarantees long-term stability, repeatability, and accuracy. The device offers flexible integration via configurable analog and digital outputs, including industrial protocols such as Modbus RTU, Modbus TCP, Profinet, and EtherNet/IP Setup is straightforward using the free CompactPlus Connect PC software or the IR mobile app for Android.
Developed, produced, and factory-calibrated in Germany, the CTi LT is supported by a range of accessories—including mounting forks, sighting tubes, close-focus lenses, and air purge systems—to adapt to any industrial environment. Whether for plastics, coatings, electronics, or automotive manufacturing, the Optris CTi LT provides a dependable, precise, and versatile solution for critical temperature monitoring.
• Temperature range: -50 °C to 1050 °C • Spectral range: 8 to 14 µm • Response time: up to 40 ms (90% Energy) • High ambient temperature rating up to 180 °C • Higher Distance-to-spot size ratio of up to 22:1 • Unique thermal shock-resistant design for best repeatability and accuracy

The Optris CTi 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 CTi 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 CTi 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 115 ms (90% Energy), these pyrometers are optimized for efficient monitoring of fast-paced manufacturing processes across industries. Their wide temperature range from -50 °C to 1050°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 CTi 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 CTi LT series is further emphasized by the range of analog and digital outputs provided by the electronics box, including a built-in USB-C interface, 0/4 – 20 mA, 0 – 5 V, 0 – 10 V, Thermocouple (Type K), USB, RS485, RS232 interface, relay outputs (2 x optically isolated), Modbus RTU, Modbus TCP, Profinet, and 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.

In summary, the Optris CTi 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.