Eti therma thermometers eti 221 041 this thermometer from eti has been manufactured to a high standard and is the ideal instrument for achieving maximum accuracy and repeatability of a temperature reading the therma 1 is rugged and comes housed in a robust abs case containing a biomaster additive reducing bacterial growth the thermometer operates through the range of 300 to 1372degc with a 01degc or 1degc resolution and plusmn04degc plusmn01 accuracy it is also simple