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petrpr 2019-11-13 11:38:32
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petrpr Yes, the sensors are inside and there are holes in the case for changing air inside. There are 2 sensors. One for temp a and humidity and second is combined TVOC and CO2. This is low cost version, The CO2 is calculated with humidity. Both sensors are from the same factory due to compatibility. Every second You have new numbers from it. And the speed is very high on changing conditions.

2019-09-12 07:20:47 Hilfreich (0)
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petrpr There is no calibrations. But I have to restart it for CO2 calibrating after about 5 days. In the outdoor is CO2 about 400 ppm and the Tester showed about 1000 ppm. After power off for 10 minutes it start calibrating CO2 and TVOC - it is one sensor.

2019-08-25 11:23:52 Hilfreich (0)
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petrpr 2018-09-06 12:34:19
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