Medusa R 999 Blackbody Fixed-Point Temperature Calibrator. Temperature range 30°C to 550°C.
The Medusa R is a blackbody primary source in which radiation pyrometers can be calibrated. Specifically designed to accommodate black body fixed point cells, the Medusa-R is the optimal choice for primary labs needing the highest levels of radiation measurement.

The temperature of the cavity can be set to ±0.1°C over the temperature range 30°C to 550°C. 
The controller reaches 550°C approximately 45 minutes from switch on. 
Also, the cavity temperature, as measured by a radiation thermometer took approximately 45 minutes to reach stability from switch on.

• Freeze and Melt, 

• Blackbody

• Fixed-Point Cells

• Can Be Used for Comparison Calibration

• Accuracy to ±0.05°C

The variation seen on the controller’s temperature indication over a 5 minute period was ±0.2°C. 
Similar variations were detected by a radiation thermometer looking into the cavity.
Using a portable radiation thermometer having a target diameter of 13mm, the 48mm target was surveyed. 
Maximum temperature differences of ±1°C were found for set temperatures in the range 100°C to 500°C.
Temperatures along the inner 200mm of the 285mm long cavity were measured at 400°C and 500°C, using a hand held fiber-optic radiation probe. Maximum temperature differences of ±4°C were found.

Large Fixed Point Cells can be fitted to the Medusa R giving small uncertainties suitable for Primary Standards.