2-22 GPM Portable Marine Grade Waterflow Meter

Assembled by marine HVAC experts for marine technicians, engineers, factories, dealers and boat owners.  Knowing water flow to marine HVAC system is critical to it's performance.  This meter will measure the water flow for individual chiller units up to 96,000 BTUs (8 ton).     

Shunhuan inline water flow meter, also known as a rotameter, which measures water flow of 2 to 22 gallons per minute (GPM) or 75 liters per minute (LPM). 

1" female BSP threads with added o-ring washer kit so American NPT threaded fittings won't leak!! 3-4 wraps of plumbers tape recommended but not required unless you are using short fittings that won't bottom out against the seal at the bottom of the 1" female ports.  We added the seals to stop leaks, an option you won't find on other waterflow meters.  

Connect this flow meter to the output to know exactly how much raw water your AC unit is receiving.  Meter should be vertical when in use.  Read flow at the top (wide) end of the stainless steel float.

Designed for reading raw water flow through marine air-conditioner condensers.  Marine air conditioners need 3 gpm per ton to operate correctly and not throw high pressure faults.  1 ton equals 12,000 BTU's.  For example, if you have a 16,000 BTU marine air conditioner, you need a minimum raw water flow of  4 gpm.  For a 48K chiller, you would need a minimum of 12gpm.  See chart below. 

Minimum Required Raw Water Flow in Gallons per Minute
8,000 BTU AC = 2.0 GPM
10,000 BTU AC = 2.5 GPM
12,000 BTU AC = 3.0 GPM
14,000 BTU AC = 3.5 GPM
16,000 BTU AC = 4.0 GPM
18,000 BTU AC = 4.5 GPM
24,000 BTU AC = 6.0 GPM
30,000 BTU AC = 7.5 GPM
36,000 BTU AC = 9.0 GPM
48,000 BTU AC = 12.0 GPM
60,000 BTU AC = 15.0 GPM
72,000 BTU AC = 18.0 GPM
84,000 BTU AC = 21.0 GPM
96,000 BTU AC = 24.0 GPM
120,000 BTU AC = 30.0 GPM

Note:  Excessive overpumping can damage the condenser coils of any AC unit although units that have titanium condensers are less prone to damage.  Excessive overpumping is defined but not limited too double the gallons per minute requirement.  

Great commercial grade construction. Easily handles water with glycol.  No batteries or electronics to fail.  

1. Working Pressure: ≤.6MPa or 85psi (6 bars). 
2. Operating Temperature: 0~65 centigrade or 32-140 Fahrenheit.
3. Accuracy: ±4%
4. Body Material: Acrylic resistant to most chemicals
5. Fitting Material: ABS or SS
6. Float Material: 304 Stainless Steel
7. O-ring Material: Silicon rubber

Waterline connections are available or order connection kit 90-9088.

Compares to Blue-White, PRM, Dwyer, Omega and other high-end flow meters.