Ambient Temperature: 10 to 49°C (50 to 120°F)
Power: 115 Vac
Power Consumption: 300 Watts max
Operating Temperature Range: of Blackbody Cavity: 205 to 982°C (400 to 1800°F)
Internal Sensing Element: Type K thermocouple
Repeatability: Greater of: ± 0.25% or ±2°C
Display Accuracy: ±0.5°C
Cavity Emissivity: .98 to .99
Warm Up Time: 1.5 hr from ambient to 982°C (1800°F)
Cavity Opening: 22 mm (0.88" dia).
Weight: 20 lb (9kg)
Dimensions: 7" H x 16" W x 15" D (178 x 406 x 381 mm)

This BB-4A is a blackbody temperature reference source which is adjustable over a range of 205° to 982°C (400° to 1800°F) and accurate to ±1.0% of the indicated temperature. It has a built-in digital temperature controller to provide accurate, stable temperatures as well as to provide the temperature readings of the cavity. The heated cavity provides a target of known temperature and emissivity, and virtually any infrared pyrometer with a spot size diameter less than 0.88" can be calibrated. The compact, portable design allows for quick and easy calibration setups.