Stormwater metering is used to determine discharge quantities and aid in determining contaminant load levels, thereby ensuring compliance to a facility’s permit requirements.

Illicit Stormwater Discharge - Detection and Elimination

What is an illicit discharge?
An illicit discharge is any discharge to the storm sewer system that is not composed entirely of storm water,

Cross-connections with a wastewater system,
Infiltration of wastewater to the stormwater sewer system from cracked sanitary sewer systems or malfunctioning septic systems,
Inappropriate discharges from industrial and commercial areas,
Paint, used oil or other pollutants dumped directly into storm drains.

Sigma Hellas offers for these stormwater measuring applications 2 portable flowmeters, one for full pipes (model IV) and one for partially filled pipes (PFP flow logger).

Model IV: an all-inclusive set suitable for full wastewater pipes ranging from 25 millimeter to 4.50 meter (1 to 177 inches) that measures all conductive or non-conductive containining minimum of 100 microns solids/bubbles. These basic features make the flowmeter very versatile in that it can easily be set in a few minutes. The 50000 points data logger and 30 hours of continuous operation battery life enables reporting and statistics of field work.

PFP flow logger: a portable flow logger for open channels & partially filled pipes limited only by velocity and depth (velocity range 0.03 - 3.03 m/sec, depth range 25.4mm to 4.5m), memory of 130,000 data points and flow derived volumetric flow plotting.

Other models for fixed installation are also available