Pyrometers
Precise temperature measurement from -30 °C to 3,500 °C
Pyrometers are precision, non-contact temperature measuring devices designed for monitoring and controlling temperature-dependent processes. KELLER pyrometers offer excellent optical properties, coupled with modern and robust sensor technology and interfaces tailored to meet your specific requirements.
Pyrometers selection tools
Series selection
Choose from over 300 pyrometers to find the perfect fit for your measuring task.
Product finder
Filter our range of pyrometers by your specific features and requirements.
Product overview
Stationary pyrometers with focusable optics
CellaTemp PX and CellaTemp PA series pyrometers feature focusable lenses and selectable sighting aids. The CellaTemp PX offers a modern IO-Link communication interface, while the CellaTemp PA provides measurement data via digital USB and RS 485 interfaces. Our pyrometers have a modular design and can be customized to meet your specific needs.
Ideal for:
Ideal for:
- Large measuring distances and small targets
- High-temperature processes
Compact pyrometers
CellaTemp PK and CellaTemp PR series pyrometers are designed for integration into production lines thanks to their compact design. CellaTemp PK pyrometers feature pushbuttons for parameter adjustment and an on-board display for local measurement readings. The measured values can be further processed via analog output or digital IO-Link interface.
Ideal for:
Ideal for:
- Automated production lines
- Space-constrained installation
Portable pyrometers
The series CellaPort PT series comprises special pyrometers for fast and mobile temperature monitoring. Technologically and functionally corresponding to the devices in the CellaTemp PA series. This means that portable pyrometers are also available for all stationary applications.
In contrast to the electronic devices described above, the Mikro is an optical comparison pyrometer. Especially in the field of research and development, the pyrometer is an indispensable measuring device due to the extremely precise temperature measurement of even the smallest objects from 0.1 mm.
Ideal for:
In contrast to the electronic devices described above, the Mikro is an optical comparison pyrometer. Especially in the field of research and development, the pyrometer is an indispensable measuring device due to the extremely precise temperature measurement of even the smallest objects from 0.1 mm.
Ideal for:
- Manual temperature measurements
- Small targets
Mounting combinations and accessories
Pyrometers are used in industrial ambient conditions together with mounting combinations.
Select a mounting combination based on the mounting position, the ambient conditions and the pyrometer series. Once you have made your selection, you can explore detailed technical data and drawings.
In our accessories overview you will find all the details and drawings of our electrical, mechanical and optical accessories.
Select a mounting combination based on the mounting position, the ambient conditions and the pyrometer series. Once you have made your selection, you can explore detailed technical data and drawings.
In our accessories overview you will find all the details and drawings of our electrical, mechanical and optical accessories.
Frequently asked questions
In what temperature range can pyrometers measure?
KELLER pyrometers measure temperatures from -30 to 3,500 °C, making them suitable for both low and high-temperature applications. Due to the limitations of thermal or photoelectric detectors, specific temperature ranges are covered by different pyrometer models. For example:
What are the advantages of pyrometers compared to alternative measuring devices?
- Wear-free temperature measurement even of moving targets
- Fast response times from 2 ms
- Reliable measurements in severe industrial environments
- Measurement of temperatures up to 3,500 °C
- Large and continuous measuring ranges, for example from 210 to 2,000 °C
Which pyrometers reliably measure temperatures in industrial environments?
Our pyrometers are specifically designed for industrial applications. To ensure reliable measurements in harsh industrial environments, the infrared measuring devices have a stainless steel housing with IP65 protection, a robust lens and shielded connection cables. Protection and mounting combinations are also available, including cooling housings for applications with increased ambient temperatures. The long service life and precise temperature measurement of our infrared measuring devices is guaranteed by long-term stable electronics and no built-in moving parts.
What is the difference between single-channel and ratio pyrometers?
Two-colour pyrometers display the temperature of grey body radiation correctly, regardless of the emissivity of the target. Two-colour pyrometers are less sensitive to emissivity variations due to dust, vapour or smoke in the field of view or dirty inspection glasses than one-colour pyrometers, and can provide more accurate measurements in challenging environments. Single-channel pyrometers, on the other hand, can also detect very low temperatures from -30 °C and are generally more cost-effective than two-colour pyrometers.