| Our 4-in-1 combined pH-meter, luxmeter, thermometer and humidity measuring instrument is a very durable measuring instrument. For the measurement you simply plug it into the soil, the earth or the pot and leave it there. The temperature, humidity and lux values or ph values can be read off directly. The gauge has a large display for good sight under poor lightning conditions. The probe is 200mm and guarantees stable and accurate readings. 
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