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  2. MedSense
  3. MedSense TF01 Infrared Forehead Thermometer

Error message "HI" or "LO" on the thermometer

If you are getting the "HI" error message on your thermometer, it means that the target object temperature is higher than the thermometer's measurement range (43°C for body temperature mode or 93.2°C in object temperature mode).

If you are getting the "LO" error message on your thermometer, it means that the target object temperature is lower than the thermometer's measurement range (34°C for body temperature mode or 0°C in object temperature mode).

If this should not be happening (i.e. the temperature detected should be within a normal range for the target object), then please try the following steps to solve the issue:

  1. Make sure the device probe is clean.
  2. Make sure the device is within the suitable distance from the forehead or target object (3~5cm from the forehead)
  3. Then, take a new temperature.

Please contact our support team if this does not solve the issue on your thermometer.