ST101 Timer - ON delay, Interval, Cycling 22s to 240m

I have used the ST-101 as a downtimer and found that they become unreliable after approx 3 years. The set time shortens and becomes erratic. I have had the same thing happen to three timers over the past 10 years. This is dissapointing as they are expensive to replace. ----------------------------------------------------- Dear Gavin Thank you for taking the time to write a review. What you are experiencing with the ST101 timer is not surprising. This timer was designed approximately 30 years ago, and uses very old analogue technology. Rhomberg only continues manufacturing them as replacements for units already installed in the field, due to the simplicity of plug out/plug in replacement. For new installations, I would recommend one of the newer equivalent timers that have the same functionality, but microprocessor technology. See: http://www.rhombergonline.com.au/at100-timer-on-delay-interval-symmetrical-recycling/ You will find if you purchase these from now on, you will have many years of accurate and repeatable timing. Kind regards Your Rhomberg Support Team