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Thanks Len,

I have used these in the screen and in a sunshine recorder with no problems for the first 2-3 years. Batteries never a problem. But after the 2 to 3 years the loss of data begins. I get no reaction whatever from Mindsets!

yrs Donald

For some years I've been using Mindsets (Saffron Walden) Temperature and Light dataloggers. They are like a memory stick, and at 25GBP very good value. Both types can record at a wide range of intervals. The batteries last 2 or more years. However, after a few years they tend to stop logging and res...