The Series BTM3 Bimetal Thermometer with Maximum/Minimum Temperature Pointer accurately measures the current temperature along with a maximum read or minimum read temperatures. Series BTM3 thermometers are conveniently available in multiple temperature ranges and stem lengths ranging from 2-1/2 to 12 inches. These heavy duty back-connected thermometers are ideal for any industrial applications such as boilers, ovens, or refrigerated cabinets.