FIELD: measurement technology; air medium parameter monitoring systems.
SUBSTANCE: proposed device includes temperature-sensitive resistor, capacitance moisture sensor, capacitance multiplier, self-excited oscillator for exciting electrical oscillations, controllable switch and computer. Closing element of switch is connected in parallel with temperature-sensitive resistor. Capacitance moisture sensor is connected to non-inverting input of operational amplifier; first lead of temperature-sensitive resistor is connected to output of operational amplifier and second lead of temperature-sensitive resistor is connected to output of capacitance multiplier whose output is connected to input of self-excited oscillator connected with information input of computer. Control output of computer is connected with control input of switch.
EFFECT: enhanced reliability and temperature and moisture content monitoring.
1 dwg
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