, Waltham, MA, offers a range of IR thermometers with varying temperature ranges, distance-to-target ratios, or adjustable emissivity. High temperature thermometers include the Models 42515, 42540, 42545, and 42560 with temperature ranges from –50°C to 1050°C; distance-to-target ratios including 13:1, 16:1, 30:1, and 50:1; and adjustable emissivity. Mid-range thermometers have an 8:1 distance-to-target ratio and ranges from –50°C to 600°C (Models 42510, 42530, 42580, and E220). Compact thermometers measure from –50°Cto 400°C and have a 6:1 ratio. Pocket-sized thermometers measure from –33°C to 230°C with a 1:1 ratio.