FLOW  METER Features: 100 PPM OF 100 Microns in Size Paticulate or Bubbles Required (Not for clean liquids) Battery Operated Non-Invasive Clamp-On Transducer Microprocessor-Based Signal Conditioning Electronics Large Character Display User Selected Velocity Units (FPS or MPS) Measures Fluid Velocities from 0.3 to 30.0 FPS (0.10 to 9.00 MPS) 100:1 Turndown Ratio Pipe Sizes from 6.3 mm (0.25") CE Version Available NIST Standard The FD613 Series ultrasonic flow meter features advanced Trans-Phase measuring technology, providing accurate and reliable flow velocity assessments in closed piping systems. The FD613 utilizes a non- invasive clamp-on transducer which is placed on the outside of a pipe. Within seconds, the large 18 mm (0.7") LCD provides stable flowrate readings in feet (or meters) per second. This product operates on metal or plastic pipes containing liquids with more than 100 ppm of 100 micron or larger suspended solids or entrained gases. Principle of Operation The FD613 Series flowmeter utilizes an advanced Trans-Phase measuring technique, providing accurate, non-invasive fluid velocity assessment without opening the pipe. The FD613 Series utilizes two piezoelectric crystals contained within one transducer to transmit ultrasonic energy into the fluid stream and receive back energy reflected off discontinuities (suspended particles or entrained gases) within the moving liquid. Transformations that result from the energy reflections are processed and converted to a measurement of fluid velocity by the sophisticated software algorithm. The processor also controls all operations of the instrument from its ultra-efficient battery management circuitry to a proprietary FIR (Finite Impulse Response) filtration program. Model: FD613: Handheld readout, carrying case, Silicone Couplant, and 4 AA batteries; sensor sold separately FD614-CE: FD613 kit with CE approval and sensor; for pipes 1" dia. and larger Specifications: Supply Voltage: Battery powered, non-rechargeable alkaline, four AA cells, providing over 30 hours of continuous operation Flow Range: 0.30 to 30.00 FPS (0.10 to 9.00 MPS) Display: Single line – four-digit LCD readout of velocity (18 mm (0.7") digits), signal strength, measuring units, and low battery indication Temperature: -20 to 60°C (-28 to 140°F) Enclosure Rating/Dimensions: NEMA-12X ABS plastic; 200 H x 100 W x 38 mm H (7.76 x 4 x 1.5") Weight: 0.7 kg (1.5 lb) Accuracy: ±2% full scale Transducer: Transducer Material: Plated body; ULTEM 1000 sensor material Cable: 2 m (6.6 ft) cable and connector Temperature: -40 to 82°C (-40 to 180°F) Humidity: 0 to 95% non-condensing Mounting Method: Clamp-on style with DOW 111 coupling compound