Firstcall Thermometer - Winkel Spiritus

I've been using this thermometer in my darkroom and the hook keeps it securely on the tray edge without slipping, which is a huge plus. The alcohol-filled bulb gives steady readings, and having both Celsius and Fahrenheit scales is handy. Marked at 18°C, it's perfect for dialing in developer temps.

The hook really holds steady on the edge of my developing tray, which is a huge help when mixing chemicals. The alcohol-filled bulb responds fast too, so I can keep an eye on temperature swings.

I was pleasantly surprised by how securely the hook holds the thermometer on the dish edge, leaving my hands free for agitation. The temperature markings at 18°C are crisp and easy to read against the alcohol-filled bulb. Another solid addition to my darkroom kit.