Review on Industrial Test Systems 480042 SenSafe by William Dean

I'm generally happy with the product, but I wanted to point out one thing that was unclear in the instructions. The instructions say to soak the strip for 15 seconds. in 75 degree water. When I first used the product I thought I would have to take a sample and wait for it to cool down to 75 degrees. After further research I found that the dive time depends on the water temperature and the manufacturer supplies an instruction manual that lists the dive time as a function of temperature. For spa water (typically 95-105 degrees), the immersion time is only 10 seconds.