We designed the world's first thermocouple thermometer, Model BAT-4, in 1969. It soon found uses in the lab, factory, hospital O.R. and in the field. The new BAT-12 has improvements for all these applications: In the lab: Readings to 0.1° C; near perfect stability.In the field: A superior'cold junction reference'which maintains accuracy with ambient temperature changes from O°C to 50°C; sealed construction, carrying case.