The PTFM 1.0 portable transit time flow meter is designed to accurately measure clean liquids like water, oils and chemicals, and can be used for calibrations, troubleshooting, spot checks and balancing flow. Set-up through the handheld meter is fast with a user-friendly, five-key menu system. The clamp-on transducers mount on plastic or metal pipes and ultrasonic signals are injected through the pipe between the two sensors. It works on full pipes with diameters from ½ to 48 in. The meter features a large backlit display, totalizer, 4-20mA output and a data logger with USB output and Windows software. It operates for 24 hours on internal rechargeable batteries and push-button sleep mode extends battery life for longer periods of operation. The flow meter and accessories come complete with a rugged, watertight carry case.