Accurately monitor temperatures in freezers, refrigerators, incubators, and environmental chambers with this temperature-buffered sensor. Bottle and solution insulate sensor from rapid changes, for example, when a refrigerator door is opened. Solution mimics exact temperature of samples. Stainless-steel sensor/probe assures long product life. Entire unit is waterproof. Chemical-resistant ABS plastic holder stands on a shelf or holder affixes to a refrigerator wall or any wall. Bottle may be removed from holder.