pocket thermometer: bimetalc coil is imported from US; full SS304 ; waterproof:IP65; pocket thermometer:standard:ASME B40.200-2008,dial size:1 1/8",lens:pastic,stem:3.6mm,3.8mm,5.0mm,6.35mm,length:1"~12",temperature range:-80C~600C,accuracy:+/-1.5-1-1.5%,waterproof:IP65,installtion:back,in food industry, to test the temperature of refrigerator and oven,