One of my customers wants a replacement control for his bulk tank. He has replaced three Johnson A19ABA-40C Remote bulb temp controls in about a year and a half and would like to try a different brand. The only condition I can find that would shorten the life of these is the high humidity at times in milk houses, but the there is no noticable corrosion. Any ideas or suggestions would be appreciated. I like selling controls, but I'd like to try to help him get a little longer life out of them. John