This new model OCF 5.0 Open Channel Flow Monitor uses a non-contacting ultrasonic sensor to measure wastewater flow through flumes or weirs. It features a powerful, built-in data logger with on-screen flow reports and output to USB flash drives plus Windows software to display and graph flow reports in fully customizable formats. The OCF 5.0 works with a non-contacting ultrasonic sensor mounted above the flume or weir. It includes an isolated 4-20mA and USB outputs, 2 programmable relays, a large backlit LCD flow rate display and totalizer. Calibration and selection of flume or weir are made through the built-in 5-button keypad and user-friendly menu system. Your calibration set-up is password protected and flow data and totals are safely stored through power interruptions. Temperature compensation is automatic and accuracy is ±0.25 percent. Options include Intrinsically Safe sensors, an enclosure heater, and DC power input.