Integrated Blackbody


The CI Systems SR-33 series is a compact blackbody, combining emitter head and controller in an all-in-one housing design. It is ideally suited for applications such as NUC for thermal imagers, reference for scientific and industrial measurements, and on-site calibration for commercial and medical applications at hospitals, airports and laboratories.

The SR-33 is available in two emitter sizes (4×4” and 7×7”) and is lightweight and portable. A durable construction allows use in the field as well as typical industrial and scientific environments. It is simple to use with a high brightness display and 6 preset temperatures for use in harsh environments. The 6 preset temperatures are field programmable by connection to a laptop.

The SR-33 is an efficient and cost effective instrument with no interconnecting cable, and is supplied with 18month calibration traceable to NIST standards.


  • Superior resolution
  • Excellent uniformity
  • Portable, compact and lightweight
  • Easy to operate by a single user
  • Easy to use in field conditions
  • Communication via RS232
  • 4” and 7” standard square aperture sizes available
  • Calibration is valid for 24 months
  • NIST traceable calibration
  • Removable sensor technology


Model No.



Aperture, in. 4 x 4 7 x 7
Absolute Temp. Range 5 … 100 °C
Set Point & Read Out Resolution 0.01 °C
Uniformity 0.01 °C
Temperature accuracy 0.05
Stability 0.01 °C
Emissivity 0.98 ± 0.01
Settling Time (for 1°C change), min 1.5
Slew Rate,°C/Sec 0.5
Operating voltage  90-240VAC, 50/60 Hz
Operating ambient Temperature 0° … 50°
Dimensions  161 x 190 x 301 (including handle)  150 x 218 x 341 (including handle)
Weight  7 kg 13 kg