Thermometer Jumbo Digital f/ Ref/Freezer Ea The Jumbo digital thermometers are suitable for monitoring freezers, water baths, heating blocks, incubators and refrigerators. A bottle insulates the sensor from transient temperature changes when the refrigerator door is opened. Triple display: Maximum/minimum and current probes plus room temperature Out of range alarm programmable in 1 C increments Traceable to NIST. Fulfils CDC and vaccine thermometer requirements Supplied with a Traceable certificate, a slot for wall mounting, Velcro and magnetic stripes to attach to any surface, one AAA battery, with sensor and solid state probe.