Tfa digital thermo hygrometer dewpoint pro tfa 31 1028 this digital thermo hygrometer from tfa is ideal for measuring the climate of the environment the device monitors temperature and air humidity create yourself the optimal climate for the environment features include temperature accuracy plusmn 0 5 deg c and humidity accuracy plusmn 3 of 20 90 or plusmn 4 tfa digital thermo hygrometer dewpoint pro