Chemical Injection Applications
For water line applications with a chemical injection point, install the meter upstream of the injection point. This eliminates
any meter performance issues.
Figure 10: Chemical Injection Point Upstream of Meter
If a meter must be installed downstream of a chemical injection connection, the distance between the meter and the
injection point should be between 50 and 100 feet (15 and 30 meters). The distance must be long enough to allow the water/
chemical solution to reach the meter in a complete, homogeneous mixture. If the injection point is too close, the meter senses
the two different conductivities for each liquid. This will likely result in inaccurate measurements. The injection method –
spaced bursts, continuous stream of drips or liquid or gas – can also affect downstream readings by the meter.
Figure 11: Chemical Injection Point Downstream of Meter
Sometimes, due to circumstances, it’s difficult to specify the exact downstream placement distances. Contact Badger Meter
Technical Support to review your application if necessary.
Installation & Operation Manual
Page 11
March 2014
FORWARD FLOW
FLOWMETER
CHEMICAL INJECTION HERE
UPSTREAM
DOWNSTREAM
FORWARD FLOW
FLOWMETER
UPSTREAM
DOWNSTREAM
CHEMICAL
INJECTION
HERE
50 TO 100
FEET
