Product Description BX-150 Dry-Well Temperature Calibrator The new heat source to check your thermometer's accuracy up to 300°C/572°F. Simply set the heat source to the desired test point, insert the test probe into the best fitting well, and get a verification of the performance. It's that easy! Specifications BX-150 Range 33℃ to 300℃ / 91.4℉ to 572℉ Resolution 0.1℃/℉ Accuracy ±0.5℃(33 to 199℃) & ±1℃(200 to 300℃) ±0.9℉(91.4 to 390.2℉) & ±1℉(392 to 572℉) Stability ±0.5℃ Heating Time Ambient to 300℃(572℉) after10 minutes Cooling Time 300℃ (572℉) to 100℃ (212℉) after 10 minutes Stabilization 5 minutes Well Depth 4''(100mm) Power 230/115volts Size (H*W*D) 180mm*114mm*233mm Weight 2200g Accessories: Box, AC power cable. Specifications BX-350 Temperature Range 50ºC ~ 350ºC/ 122ºF ~ 662ºF Accuracy ±0.5ºC @ 100ºC/ (±1.0ºF @ 212ºF) ±1.2ºC @ 350ºC/ (±2.4ºF @ 662ºF) Stability ±0.1ºC @ 100ºC/ (±0.2ºF @ 212ºF) ±0.2ºC @ 350ºC/ (±0.4ºF @ 662ºF) Target size 2.25” (57mm) Target Emissivity 0.95