HEITRONICS has been producing high quality cavity blackbodies for the last 40 years.  Current blackbodies offered by HEITRONICS are outlined in the table below.

Within the marketplace, there are two ‘styles’ of Infrared Radiation Sources, which are also sometimes referred to as Infrared CalibratorsBlackbody Calibrators or Blackbody Radiators.

SW11 Blackbody Calibration Source


HEITRONICS utilizes a cavity in the construction of its blackbodies, which is common practice for producing high emissivity.  HEITRONICS blackbodies produce emissivity between 0.99 and 0.9994 per the respective model.


Other blackbodies in the marketplace may utilize a flat plate which will typically have an emissivity between 0.95 to 0.96.  Sources of this kind are correctly referred to as a ‘plate radiation source’ due to their relatively low emissivity and, as such, are not truly a ‘blackbody’.  The errors that can be induced by such a low emissivity when performing low-end temperature calibrations is a topic that should be carefully considered by consulting with the provider of such sources,  if the subject is not specifically addressed in the documentation supplied with the plate radiation source.


HEITRONICS and Wintronics personnel are available to discuss the technical merits of applying a HEITRONICS Transfer Radiation Thermometer for use with such plate radiation sources.


Compared to the relatively small cavity diameters offered by HEITRONICS and other cavity blackbody producers in the market, plate radiation sources are commonly the source of choice when calibrating relatively low-cost single spot measuring pyrometers, such as the popular handheld infrared thermometer with 8 … 14 microns ( or similar ) spectral range. A primary reason that these instruments are low in cost is influenced by the low cost optics used in the design, which produces low optical resolution. With the low optical resolution, the FOV becomes too large for acquiring the energy emitted from a Ø1 inch cavity, for example. A very popular and high quality plate radiation source has a Ø6 inch radiator.  Large area plate radiation sources are also commonly used for thermal image camera performance testing.


HEITRONICS cavity blackbodies are available to be operated between -20 … 1000 °C. The high quality construction of HEITRONICS cavity blackbodies is evidenced by the continued operation of these blackbodies, made over 30 years ago, by the Wintronics calibration laboratory.


Blackbodies offered by HEITRONICS are commonly used to calibrate pyrometers, infrared thermometers and radiometric thermal imaging cameras.



Blackbody Source Overview

  ME30 SW10C SW11B SW15 SW40
Temperature Range -20 to 180 oC
90 to 350 oC
50 to 400 °C

350 to 1000 °C

50, 60, 80 or 100 °C
Fixed Set-point
30 to 150 °C
Emissivity 0.9994 ≥ 0.99

≥ 0.992 to 0.999

≥ 0.996

> 0.995

Non-Uniformity of
cavity temperature
 < 0.1 o*

< 1 oC

< 1 oC

< 1 °C

< 0.2 °C

Setpoint Resolution  0.1 oC

0.1 oC



0.01 °C

Voltage 230 VAC 230 VAC 115 or 230 VAC 12 VDC ***

115V/60Hz or
230V/60Hz **



*    ME30 non-uniformity is < 0.1 oC between -20 to 100 oC. Refer to datasheet for more details.
**    SW40 controller voltage input options are available.
***    SW15 is powered by either 12VDC Battery Pack or 12VDC Power Supply.




Calibration Services


Wintronics Calibration provides the highest level of measurement service available today to ensure the exacting quality you demand from your measurement equipment.




Field Service Engineer Calibration

Wintronics' Field Service Engineer Calibration Program manages all your service engineers' calibration needs - from equipment scheduling and tracking to shipping and calibration - and provides quality reports and certificates of calibration.