Temperature measurement with solar energy

The Geratherm® solar speed works completely without batteries and has small solar cells that take over the power supply of the thermometer. Once fully charged, it can be used for up to 72 hours without light.

Important documents

Gold Cap Capacitor

The energy storage Gold Cap condenser of the Geratherm® solar speed keeps the required charge in complete darkness for up to 72 hours. Up to 25 measurements can be carried out with one energy transaction.

Fast & precise

The thermometer determines the body temperature in approx. 9 seconds.

Fever alarm signal

If the temperature reading is greater than 37.5°C, a beep will sound and repeat rapidly for eight seconds.

Technical Data

Measuring range 32 °C bis 43,9 °C
Measurement accuracy +0,1 °C / - 0,1 °C in the range of 34°C to 42 °C; outside of this range +0,2 °C / - 0,2 °C
Intended purpose Medical thermometer for determining body temperature
Measuring locations rectal, oral, axillary
Storage conditions -25 °C to 55 °C and dry
Please refer to the instructions for use for full technical data.

Questions and answers

No, the Geratherm® solar speed can be switched between Celsius and Fahrenheit. The unit of measurement used is ° Celsius.



No, because the Geratherm® solar speed does not have a battery. The energy is supplied via a built-in solar cell.

You can put a hygienic disposable cover on the probe to avoid virus transmission. When using disposable cases, there may be a deviation of 0.1 °C (0.2 °F) from the actual temperature. Discard the disposable sleeves after the measurement.

Disposable covers are available from the pharmacy.

Wipe the probe head with a solution of mild soapy water and cold water. Disinfect the thermometer by wiping the sensor and the lower section of the housing with a cloth previously dipped in alcohol (recommendation: isopropyl alcohol 70%). Do not boil the thermometer and do not clean it in the autoclave.


No, the Geratherm® solar speed is not waterproof.

The Geratherm® rapid complies with IP 20, is therefore protected against solid foreign bodies with a diameter of 12.5 mm and has no protection against water.