The FLOMEC® QS100 Ultrasonic turf irrigation flow sensor measures water flow rates 5X lower than competing flow sensors. This 1-inch flow sensor is economically priced and is the preferred choice for commercial and residential irrigation flow detections and measurement of small leaks and line breaks. The ability to detect flows down to 0.22 GPM makes it ideal for low-flow drip zones. In addition to its low-flow capabilities, ultrasonic technology means no moving parts to wear out or fail when winterizing systems using compressed air. QS100s are supplied with two single conductors, 18 AWG solid copper wire leads that are 36 inches (914.4 mm) in length with UL Style 116666 direct burial insulation.