Max/Min Spirit Thermometer Color:Green Each sender also displays temp

Each sender also displays temp and humidity for its station

coloured balls in the special liquid (paraffin oil base) are calibrated to fall as the temperature rises - the lowest floating ball shows the correct temperature (within 2 degrees C

Concentrate a ray of sunlight light on it and see the prism split the light into component colours of the spectrum

find key constellations (eg Southern Cross)

Max/Min Spirit Thermometer Color:Green Each sender also displays tempThis classic spirit thermometer is suitable for either indoor or outdoor locations, has max min and reset functions, and comes in cream or green plastic casing. Particularly useful for monitoring overnight lows or daytime highs. Made in germany by TFA. This version operates inversely you read the LOWESTpoint of the spirit for current temperature and lowest point of the contrast liquid for recent max min (see photo). Easy reset just push the middle