Flow Probe - FP111, FP211, FP311

The Global Water Flow Probe is a highly accurate water velocity instrument for measuring flows in open channels and partially filled pipes.

The water velocity probe consists of a protected water turbo prop positive displacement sensor coupled with an expandable probe handle ending in a digital readout display.  The water flow meter incorporates true velocity averaging for the most accurate flow measurements.  The Flow Probe is ideal for storm water runoff studies, sewer flow measurements, measuring flows in rivers and streams, and monitoring water velocity in ditches and canals.


  • Digital display in ft/sec or m/sec
  • Records 30 data sets for later analysis
  • Rain-proof digital computer
  • Highly accurate easy flow monitoring
  • Debris shedding turbo-prop
  • Lightweight, rugged, and reliable
  • Telescoping handle with staff gauge
  • Padded carrying case for easy storage
  • CE Certified
  • Used by water professionals worldwide since 1990
  • Ideal for measuring flows in streams, rivers, canals, stormwater, wastewater, inflow and infiltration studies, and industrial process waters
Range 0.3-19.9 FPS (0.1-6.1 MPS)
Accuracy 0.1 FPS
Averaging True digital running average.  Updated once per second.
Display LCD, Glare and UV Protected
Control 4 button
Datalogger 30 sets, MIN, MAX, and AVG
Features Timer, Low battery warning
Sensor Type Protected Turbo-Prop propeller with magnetic pickup
Expandable Length 3.7 to 6 ft (1.1 to 1.8 m) (FP111); 5.5 to 15 ft (1.7 to 4.6 m) (FP211); 2.5 to 5.5 ft (0.76 to 1.7 m) (FP311)
Probe Material PVC and anodized aluminum with stainless steel water bearing
Computer Material ABS/Polycarbonate housing with polyester overlay
Power  Internal Lithium Battery, Approx 5 year life with typical use, Non-Replaceable
Auto Shutoff After 5 minutes of inactivity
Operating Temperature -4° to 158° F (-20° to 70° C)
Storage Temperature -22° to 176° F (-30° to 80° C)
Carrying Case The Flow Probe is shipped in a padded carrying case
Approvals CE