CURRENT METER The electromagnetic field between two electrodes measures the movement of water (the conductor) and evaluates the flow rate. This is indicated on a hand held control unit or logged. Averaging or sampling intervals can be input. Particularly useful in shallow (can measure in only 5cm water depth) or  weeded waters. Key Features Range +/- 5m/sec Not affected by weeds or silty water. Used in a range of fluids, wastewater etc. Flat probe for shallow water Accuracy: ±0.5% reading plus zero stability Measuring range: -5 to +5 m/s (calibrated for positive flow only) Zero Stability: Filter: digital (0.3 Hz) Dimensions: Ø sensor 40mm  length: 210 mm Material: stainless steel and polyurethane signal cable Cable: PU 5m (standard) max. 100m Operation temperature: - 5 to 40°C Storage temperature: -10 to 70°C Display of: Real time flow, average flow, standard deviation of flow in average, countdown of time in average period, average mode and period, data record  number and series, date, time and low battery.  Average modes: moving, fixed or free running (multiple fixed) Average period: user selectable, 1-999s Memory: up to 1000 readings Display resolution: 0.001m/s Display update: 1 Hz Unit:  m/s or ft/s Backlight: switchable  on/off Calibration Setting: enables user to input zero and gain for particular unit after calibration Hydrodynam. calibration: enables user to input non-liearity of sensor after calibration Acoustic signal: switchable  on/off Dimensions: 244 mm x 163 mm x 94 mm Weight: 2 kg Housing: Die cast ABS IP 67 with carry strap Operation Temperature: -5° to 50°C Storage Temperature: -10° to 70°C Interface: RS 232, 4800 Baud, 8 data 1 stop bit, no parity, Realtime- and logged data output: average flow, standard deviation, date, time. Real time data is output at the end of every averaging period. Power Supply:  8 C cells (Alkaline), 25 hours measuring time without and 17 hours with backlight