Figure 1

Effects of immersion on temperature sensor readings. Mean difference between temperature sensors (circles = brain type 1; squares = brain type 2; triangles = body type) and ethylene carbonate triple-point temperature (26°C) reference source with sensor at intervals of 1 cm from base (10 cm depth of immersion) of re-entrant well. As an example for the body type sensor, full immersion is at 10 cm. Withdrawing the sensor 4 cm up the re-entrant well changes the immersion depth to 6 cm and a corresponding change in the temperature reading of 0.5°C.