DEVICE FOR MEASUREMENT OF HUMIDITY Russian patent published in 2009 - IPC G01N27/22 

FIELD: measuring technology.

SUBSTANCE: device for measurement of humidity is designed for performing express control of moisture contents of electric insulating oils. The device for measurement of humidity consists of a differential analogue converter, of an indicator and measuring capacity sensor in form of immersed pair of electrodes; also the device is additionally equipped with a programmed controller and a compensating capacitive sensor likewise made in form of pair of immersed electrodes with a system of electromagnetic coils of counter connection. The measuring capacitive sensor is additionally equipped with a system of electromagnetic coils with matched junction. Notably, each of electromagnetic coils is electrically connected with corresponding sources of pulse current controlled with a pulse, generated with clock-out of the programmed controller. Start-up of the programmed controller is initiated from the start-up circuit. An information signal registered with the programmed controller is formed with the differential analogue capacity-voltage converter, electrically connected to measuring and compensation capacity sensors. Output of information in units of humidity contents is done from the programmed controller to the indicator, zeroing of which the controller performs.

EFFECT: upgraded accuracy of measurement of humidity contents of samples of tested object, for example oil of transformers; simplification of device design.

2 cl, 1 dwg