It has been specialy developed for the use in the darkroom with a narrow range of 50 to 120°F allowing a more accurate scale to be spread out over this narrow range.
Thus the large display can be read easily under red darkroom light, and if you're doing sheetfilm tray development in complete darkness, you'll love the glowing indicator and the marker at 20 degrees. The thermometer is made from rust-free stainless steel and is maintenance-free. If you drop it, the indicator will jump around like crazy, but it won't break like it's glass cousins. The included stainless steel clip helps make sure that the thermometer sits securely on the tray lip and that the scale is level.
The 20cm length means you can also effortlessly measure the temperature of liquids in a high container like a measuring beaker. But because of the length, it isn't intended for trays that are smaller than 18x24 cm.
Technical Data:
Length: ca. 21 cm
Diameter: ca. 5,5 cm
Measures from: 10 to 50 deg C / 50 to 120 deg F
Scale: Celsius in Half-degree steps and Fahrenheit
Precision: 1% (equals +/- 0,2° at 38°) when immersed at least 15 cm deep in liquid
Readability in the dark: gowing indicator and the marker at 20° C