What is a suitable thermometer?
A. Any good quality digital or analog thermometer can be used to measure developer temp. Do not use a mercury in glass thermometer. Pet shops sell simple thermometers which can display either colors or numbers that indicate the temperature. These can be immersed in the developer solution or attached to the walls of the tank. Electronic shops sell simple indoor/outdoor thermometers that have a remote probe for measuring outdoor temperature. The probe is often very small and is covered with PVC, Teflon or some other material that is immune to developer chemicals. This probe can be immersed in the developer tank and the temperature display attached to a wall near the processor for easy reading. Use your imagination. Just monitor and record the developer temperature in a way that is simple, easy to record and reliable. Optimum image quality depends a great deal on the correct developer temperature.
