2016 cheap portable water flow meter

Features:
Precision measurement 
Small size, light weight 
Non-contact measurement 
Large measuring range 
Charging Power 
Large-screen LCD 
Built-in data logger Parameters:
 
Parameters:
Linearity:0.5%
Repeatability:0.2%
Accuracy:Better than ± 1%, the flow rate of > 0.03m / s
Response time:0 to 999 seconds , the user optional
Flow rate range:± 32m / s
Pipe size:15mm ~ 6000mm
Units of measurement:Meters, feet , cubic meters, liters, cubic feet , U.S. gallons , UK gallons , barrels , U.S. liquid barrels, barrels of liquid Britain ,U.S. trillion gallons , the user-specified units
Cumulative unit:7 positive, negative and net totalizer
Liquid species:Various single uniform conduction of ultrasonic energy in a liquid
Safe sex:Lock settings , changing data to be unlocked
Show: 4 × 8 or 4 × 16 English Chinese
Communication Interface:RS-232, baud rate 75-57600 , also compatible with Fuji ultrasonic flowmeter, the user's requirements should also be compatible with other products
Sensor:Standard for the M1 -type , while the other four kinds to choose from
Sensor cable:Standard 5m × 2, can also be extended to 10m × 2
Power source:3 AAA Ni-H built-in battery is fully charged each work 12 hours a sustainable , AC100V-240V adapter
Data records:Built-in data logger can record 2000 lines of data
Manual Totalizer:7 , the key to start for calibration
Case Material:Flame retardant ABS
Dimensions:210 × 90 × 30mm
Weight:500g (1.2 lbs) including battery