Paterson 9" Darkroom Certified Thermometer

I've been mixing chemicals by feel for too long, but this 12-inch stem reaches deep into the bottle and the Celsius scale is super clear even in dim light.

Finally, a thermometer that actually stays put in the mixing jug. The 12-inch length reaches deep enough to get a stable reading, and the clear markings are easy to read even under dim safelight. It’s a simple tool that just works.

I was tired of guessing water temps for my film development, but this thermometer’s clear markings from 15°C to 65°C let me dial in exactly 20°C without squinting. The steel casing feels sturdy, and the clip holds it steady on my tank edge.