QT-WT01 underwater button temperature data logger

http://www.channeleco.com/en/
http://www.channeleco.com/en/Item/Show.asp?m=1&d=1215
QT-WT01 underwater button temperature data logger is an accurate, small-sized and easy-to-use device. It can be placed underwater as deep as 30 meters to monitor long-term temperature changes in the water.
Technical parameters

MODEL B101
Temperature measurement range -40~+85℃
Temperature measurement accuracy ±0.6℃（-15~+65℃）
Depth 30m
Storage Capacity 8000 sets of data
Protection grade IP56
Material Stainless steel
Battery Built-in, about 10 years of life
Size 28 mm x 25.4 mm
Origin: CHINA
http://www.channeleco.com/en/Item/Show.asp?m=1&d=1215
http://www.channeleco.com/en/