All probes in the standard 400 Series can be used interchangably with all Thermistor Thermometers Precision Thermometer without loss of accuracy. Interchangeability tolerance is ±0.1°C over the biological rangefrom 32° to 42°C. They have a temperature range from -40°to +150°C, except where otherwise indicated, and have a 3.1 m (10 ft) lead terminating in a 400 Series phone jack connector.