FIELD: measurement equipment.
SUBSTANCE: invention relates to a device and method to detect level, using electromagnetic waves for detection of distance to surface of product contained in the reservoir. The method to detect product filling level in the reservoir includes the following steps: a) electromagnet probing signal is transmitted to the target area of the product surface; b) reflected probing signal is received, which is reflection of the electromagnet probing signal from this surface; c) value of the parameter is detected, being the reflected probing signal amplitude index; if the amplitude index value is more than the preset threshold value; d) the electromagnetic measurement signal is transmitted to this target area of product surface; e) the return signal is received, which is reflection of the electromagnet measurement signal on the surface; and f) filling level is detected on the basis of time ratio between the electromagnetic measurement signal and the return signal.
EFFECT: increased reliability and energy efficiency, in particular, due to provision of shorter active time of device operation.
9 cl, 5 dwg
