Measurement
Flow Meter
The must-have tool for water-system diagnostics. Whether installing a water-treatment system or a sprinkler system, the Sentry Flow Meter provides accurate GPM measurement at varying pressures.
Overview
The Sentry Flow Meter
Accurate flow rates of pumps from 0–100 PSI • 4–28 GPM
The Sentry Flow Meter was developed to provide accurate flow rates of pumps from 0–100 psi, at flow rates anywhere from 4–28 GPM. The unique design was engineered after years of trying to diagnose water-pressure problems in various applications.
A “must” for every service truck.
Plumbers, well-service people, water-softener repairmen, lawn-sprinkler and turf-service crews, as well as all other service professionals depend on the Sentry Flow Meter for a variety of reasons.
By adjusting the handy ball-valve, the Sentry Flow Meter can tell you the condition of the pressure tank, pressure switch, and pump, and whether there are any restrictions in the water line. This helps in determining problems in water-pump systems or in the water-distribution system. The meter is also ideal for detecting scaling in pipes in city-water applications by showing low flow rates and severe pressure drops.

Common applications
Where this system is commonly used
Dosing
Accurate dosing
Flow measurement supports accurate setup, dosing, and calibration.
Setup
Calibration
Used to support dependable calibration during installation and service.
Verification
System checks
Provides a reference point for verifying system flow.
System fit
How it fits into a treatment system
The Flow Meter is commonly installed where flow data supports dosing and calibration, frequently alongside the Dry Pellet Chlorinator.
It is a component within a larger treatment system rather than a standalone treatment device.
Key features
Key features
- Flow measurement for well-water systems
- Supports accurate dosing
- Supports dependable calibration
- Commonly paired with chlorination
- Dealer-supported component
Literature
Manuals & spec sheets
Watch & learn
The Sentry Flow Meter on video
Related
Related products

Dry Pellet Chlorinator
This product shines when your well water doesn’t. Commonly used for iron bacteria, light iron, and light rotten-egg odor, it provides the first stage of a well-water treatment system.
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ReVolution Package
Installs on any Open-Air System to help keep tanks clean, reduce maintenance, and increase the longevity of your treatment equipment.
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