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Part of 4M's Green Science range = stresses recycling
and clock with calendar
Mechanical
ie a pattern of city lights that display more and less developed areas
can be placed up to 100 meters from gateway unit
Classic Hanging Hygrometer Digital Thermometer Part of 4M's Green ScienceClassic dial display of humidity, with brass ring (or screw mount) to hang or shift easily. Humidity is the least precise of measurements, allow 5% plus or minus from the reading: but really, for most everyday uses, you're mainly interested in whether it's above 60 or not. If it is , do something to relieve it open windows, put on a fan.
US$ 110.00
US$ 36.00
US$ 15.00
US$ 25.95
US$ 70.00
