The paper describes the development of a non-invasive flowmeter for lower flow rates and its first tests. This gauge is physically based on the interaction of fluid flow with an ultrasonic signal that passes through the fluid from the transmitter to the receiver. Ultrasonic flowmeters are currently relatively commonly used gauges. whose advantages such as non-invasiveness (i. https://macorners.shop/product-category/blue-bottle-lamp-gift-box/