In my experience, industrial timers like these are very loud; I've used them for darkroom photography. You pay for it though: http://www.amazon.com/GraLab-Model-General-Purpose-Minute/dp/B002VLZ2HM/ref=sr_1_2?ie=UTF8&qid=1319403049&sr=8-2 - http://www.amazon.com/GraLab-Model-General-Purpose-Minute/dp/B002VLZ2HM/ref=sr_1_2?ie=UTF8&qid=1319403049&sr=8-2 - http://www.amazon.com/GraLab-Model-General-Purpose-Timer/dp/B002VLZ2O0/ref=sr_1_12?s=industrial&ie=UTF8&qid=1319403090&sr=1-12

In my experience, industrial timers like these are very loud; I've used them for darkroom photography. You pay for it though: http://www.amazon.com/GraLab-Model-General-Purpose-Minute/dp/B002VLZ2HM/ref=sr_1_2?ie=UTF8&qid=1319403049&sr=8-2 http://www.amazon.com/GraLab-Model-General-Purpose-Timer/dp/B002VLZ2O0/ref=sr_1_12?s=industrial&ie=UTF8&qid=1319403090&sr=1-12