This overview covers dedicated black body sources for low uncertainty calibration of infrared thermometers. A range of portable primary black body sources combines high emissivity with excellent temperature uniformity. The cylindrical design minimises the effects of air movement and environmental changes. Many of the sources can be used with high purity ITS-90 Fixed Point Cells where the thermometer is calibrated against the freezing temperature of a pure metal.

Black body

A black body is defined as a source with no reflectivity or a source emitting the maximum possible radiation (at all wavelengths) for its temperature.


Emissivity is the ratio of the radiation emitted by a surface to that of a black body at the same temperature. Isotech has a range of sources with high emissivity combined with thermal uniformity for use as primary standard sources for low uncertainty calibration.

1) The primary black body standard

The temperature source has excellent emissivity with sufficient uniformity to allow the test thermometer to be compared to a traceable contact thermometer.


2) The secondary black body standard

In this method the black body is calibrated with a standard thermometer and the test thermometer is compared to the source.



3) Calibration using a black body transfer standard

In this method the test thermometer is compared with a standard radiation thermometer.


4) Use of ITS-90 Fixed Point Cells

The test thermometer is calibrated, not against a source or other thermometer, but against a fixed temperature point of an ITS-90 Fixed Point Cell. Such a point is obtained for example by melting a quantity of pure Gallium to obtain a fixed temperature of 29.7646°C


Arnold Memelink

Arnold Memelink


"The ABB Power Grids Jumet organisation is an innovative development and production facility of ABB that manufactures active filters and battery energy storage systems to support a stable grid. To test these systems we have acquired two Cinergia GE/EL +120kVA eplus units capable of doing grid emulation (AC + DC), operating as an electronic load (AC +DC) and being a battery emulator. We have experienced very good support from TTMS in obtaining these two Cinergia units. This included organising an on-site demonstration and supplying loan systems prior to the delivery of our final systems. This way we could start testing as early as possible. TTMS also organised training for the operators from the original manufacturer. This support allowed us to introduce the first battery energy storage systems even prior to the full delivery of the Cinergia systems."

University of Luxembourg

Sasan Rafii-Tabrizi

University of Luxembourg

“At the Energy and Environment department of the Faculty of Science, Technology and Medicine (FSTM) of the University of Luxembourg we do have different research projects related to green energy contributing to the development of eco-cities. As a long-standing partner of our research unit, TT&MS has proven that they are able to answer even the most complex questions in a professional manner. They have shown that they are always up to date with the latest technology and do not spare any effort to look at the application and even the situation on site. The exchange of ideas was always very pleasant and took place quickly. We look forward to further years of fruitful cooperation.”


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