NRLM type comparison blackbody furnaces, which have been jointly developed with the National Research Laboratory of Metrology, are large opening blackbody furnaces for calibration of radiation thermometers, and a high temperature comparison blackbody furnace uses a standard radiation thermometer for comparison calibration.NRLM Type Comparison Blackbody Furnace.
| The cavity is profiled as a double cone and the high emissivity is realized with a large opening. |
| For low temperature, a platinum resistance thermometer (sold separately) is used as a standard thermometer. |
| For medium temperature, a 0.9µm standard radiation thermometer (sold separately) is used for comparison calibration. |
| Long-term stability. |
| Model | Type |
| IR-R24 | NRLM type comparison blackbody furnace for low temperature |
| IR-R26 | NRLM type comparison blackbody furnace for medium temperature |
| IR-R27 | High temperature comparison blackbody furnace |
| Model | NRLM type comparison blackbody furnace | High temperature comparison blackbody furnace | |
|
For low temperature IR-R24 |
For medium temperature IR-R26 |
IR-R27 | |
| Temperature range | 50 to 450°C | 200 to 1050°C | 800 to 1450°C |
| Maximum temperature | 500°C | 1100°C | 1500°C |
| Maximum temperature rising time | About 2 hours | About 4 hours | About 2 hours |
| Cavity opening diameter | 60mm | 50mm | 30mm |
| Cavity emissivity | 0.993 | 0.997 | 0.99 |
| Cavity section shape | Double cone type | Cylindrical cone type | |
| Temperature stability | ± 0.15K/30 minutes | ± 0.25K/30 minutes | ± 0.5K/30 minutes |
| Power supply | 100VAC, Single phase | 200VAC, Single phase | |
| Power consumption | Maximum 500VA | Maximum 1200VA | Maximum 2500VA |
| Weight | About 30kg | About 32kg | About 36kg |
| Performance Specification Sheet | Blackbody Furnaces | IR-R24, 26, 27 | Download |
