Simple temperature, A fast monitoring system based on proprietary color change technology inexpensive and straightforward to use immediate response enduring archive of highest water and, Temperature oil steam resistant accuracy tolerances less than 100 c is, /, 1 c 100 c to 154 c is, /, 1. 5 c greater than 154 c is, /, 4 c temperature range 29, 290 c silver to black color change last black event is the highest temperature achieved