The ATF1 is a K-type rod thermocouple for submerging into liquids and measuring temperature. Use with theATEXT10 extension for easier maneuverability – especially with thermometers with K-type jacks on the face of the meter. The rod can withstand high temperatures up to XXX°F. Measures air temperature too. The cone tip can help in piercing semi-solids such as food, but it’s not sharp enough for piercing ductwork. The ATF1 can be used with any of our meters that measure temperature and any thermometer accepting a K-type thermocouple.