The Thermal Vial™ is a new temperature sensing system for ultralow freezer, cryogenic storage, blood bank, and other medical and scientific storage applications to –269°C (4°K). The system includes a precision RTD probe, match-calibrated 4-20 mA transmitter in a moisture-proof enclosure, ruggedized flexible cable, and a fluid-filled container that lets the sensor mimic the thermal response of other freezer contents. The sealed unit prevents spillage problems and contamination of contents, the manufacturer says.