Designed to measure heat radiation from the sun, this device consists of an aluminum tube with a blackened front enclosed in a cardboard tube blackened on the inside. Includes a borehole for a thermometer.
Aluminum tube: 30 mm x 40 mm dia. approx.
Cardboard tube: 195 mm x 50 mm dia. approx.
Weight: 350 g approx.
Thermometer (U8451700) and Thermometer Clip (U8452570) sold separately.