Pyrometer
Precise temperature measurement from -30 °C to 3,500 °C
Pyrometers are precise and non-contact temperature measuring devices that enable the monitoring and control of temperature-dependent processes. KELLER pyrometers offer excellent optical properties as well as modern and robust sensor technology and interfaces for your specific requirements.
Tools for selecting a pyrometer
Series selection
Choose the right type for your measuring task from over 300 pyrometers.
Product finder
Filter our pyrometers according to features and your requirements.
Product overview
Stationary pyrometers with focusable optics
The pyrometers in the CellaTemp PX and CellaTemp PA series have focusable optics and selectable sighting aids. The CellaTemp PX offers a modern IO-Link communication interface, while the CellaTemp PA provides the measured values via digital USB and RS 485 interfaces. Our pyrometers have a modular design and can be individually adapted to your requirements.
Ideal for:
Ideal for:
- Large measuring distances and small measurement objects
- High temperature processes
Compact pyrometers
Pyrometers of the series CellaTemp PK and CellaTemp PR series are designed for integration into production systems thanks to their compact design. The CellaTemp PK pyrometers have buttons for setting the parameters and a display for showing the measured values on site. The measured values can be further processed via analog output or digital IO-Link interface.
Ideal for:
Ideal for:
- Automated production systems
- Limited installation space
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 measurement objects
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 view detailed technical data and dimensional 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 view detailed technical data and dimensional 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 do pyrometers measure?
KELLER pyrometers measure temperatures from -30 to 3500 °C. This makes the measuring devices suitable for both low-temperature and high-temperature applications. As pyrometers use thermal or photoelectric detectors with limited dynamic ranges, specific measuring ranges are recorded depending on the design (measuring principle, optics, sensor technology). Examples of our products are
What are the advantages of pyrometers compared to alternative measuring devices?
- Wear-free temperature measurement even of moving measurement objects
- Short response times from 2 ms
- Reliability in demanding 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 have been developed for industrial use. 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?
With gray radiators, quotient pyrometers display the temperature correctly regardless of the emissivity of the object being measured. A ratio pyrometer is also much less sensitive to dust, steam or smoke in the field of view or dirty sight glasses than single-channel pyrometers. Single-channel pyrometers, on the other hand, can also detect very low temperatures from -30 °C and are generally less expensive than ratio pyrometers.