This indoor thermometer with hygrometerby Ventilution for technical horticulture, especially indoor plant cultivation under artificial light, does not only show the actual temperature and humidity, but also the highest and the lowest value within a period defined by you.
That's how the HH439 makes a precise documentation and a professional and accurate climate control indoors.
This is essentially necessary for a successful cultivation and a rich crop.
The external cord with its almost 3 metres long cord you can easily change places to measure, for example direcly above the tops of the plants, while the device itself is stored aside.
The thermo-hygrometer with external sensor is ca. 13.5 cm high and ca. 7.5cm wide.
Temperature range indoor: -10° to 50° C
outdoor: -50° to 70° C
Indoor hygrometer range: 25% RH to 98% RH
Use a 1.5 Volt AA battery for the device.