OCF 4.0  Open Channel Flow Monitor
Non-Contacting Ultrasonic Sensor Accurate and Verifiable Built-in 50,000 point Data Logger Windows Software USB and RS232 Outputs 4-20mA/0-5V Output 16-digit Totalizer 3 Programmable Control Relays Password Protected Simple 3-key Calibration
OCF 4.0  Open Channel Flow Monitor Continuously monitor, display, totalize and data log flow through any flume or weir. The OCF 4.0 includes a non-contacting ultrasonic sensor that mounts just 8" (203.2 mm) above the flowing water. It is accurate (±0.25%) and reliable. There is no obstruction to flow and no fouling. Use the built-in Keypad/menu system to select your flume or weir from the Menu and to choose measurement units (gallons, liters etc.)  The Greyline OCF 4.0 includes built-in 50,000 point Data Logger and flow reporting system. Retrieve data logs with 'Greyline Logger' software – included free with each OCF-4.0. Connect the USB or RS232 output directly to the serial port on your PC or Laptop, or by dial-up connection through modems. Configure the analog output to 0-5V for reduced power consumption. Use the isolated 4-20mA to transmit flow to remote chart recorders or displays, and the 3 control relays are programmable for level/flow alarm, and flow proportionate pulse (for samplers, chlorinators or remote totalizers). An Intrinsic Safety Barrier is optional for sensor and cable installation in hazardous rated locations. The separate, watertight electronics/display enclosure is mounted at a convenient location within 500 ft (150 m) of the sensor.