Digi Flow 6700M DigiFlow Volume Totalizer and Flow Rate Indicator Count up.

Volume totalized up to 99,500 liters
Flow rate display from 1.5 to 14.1 liter/min
Operating Voltage : 3 DC Volts (2 x AAA Batteries)
Operating Current : 1.0 mA (work), 0.05 mA (sleep)
Automatic data memorized when battery power is off
Pressure : Max. 6.0 bar (85 psi)
Connection : 3/8 NPT Male or 3/8 BSP Male (Not included)
Includes Batteries, instructions and self adhesive Velcro for fastening.