Patent ID: 7111516

Claim:
A device for intube ultrasonic thickness metering operating inside a tested pipeline and comprising a housing accommodating equipment for measurements, processing and storage of the measured data, said equipment including a probing pulse generator, an ultrasonic transducer, an amplifier, a comparator with an analog input, a digital timer, a processor and a data storage module connected in series; the device further comprises a controlled reference voltage source whose output is connected to the reference voltage input of said comparator, the reference voltage source is capable of setting at the output at least two values of reference voltage and has a first control input for setting a first reference voltage at the output and a second control input for setting a second reference voltage at the output, the first control input of reference voltage source being connected to one of the outputs of the probing pulse generator or to the processor output, the second control input of reference voltage being connected to the comparator output.