WQ730 Turbidity Sensor
WQ770-B Turbidity Meter
Global Water's Turbidity Sensor is a highly accurate submersible
instrument for in-situ environmental or process monitoring.
Applications for the turbidity sensors include: water quality
testing and management, river monitoring, stream measurement,
reservoir water quality testing, groundwater testing, water and
wastewater treatment, and effluent and industrial control.
In accordance with USEPA Method 180.1 for turbidity
measurement, the Turbidity Sensors are a 90 degree scatter
nephelometer. The turbidity sensor directs a focused beam into
the monitored water. The light beam reflects off particles in
the water, and the resultant light intensity is measured by the
turbidity sensor's photodetector positioned at 90 degrees to the
light beam. The light intensity detected by the turbidity
sensor is directly proportional to the turbidity of the water.
The turbidity sensors utilize a second light detector to correct
for light intensity variations, color changes, and minor lens
For environmental or process monitoring, simply place the
turbidity sensor directly in the water and position it where the
turbidity is to be monitored. Since the turbidity sensor uses
light to detect the water's turbidity ensure that the minimum
amount of external light possible is exposed to the monitoring
The Global Water Turbidity Meter combines the turbidity sensor
(described above) with a handheld meter that has a six digit LED
screen, 4-button control panel, and an internal 9V battery. The
handheld portable turbidity meter can be used for enivronmental
or process sites that do not require permanent monitoring. The
turbidity meter will display readings directly in either
nephelometric turbidity units (NTU) or parts per million (PPM).
The turbidity meter also includes an automatic shutoff feature
to conserve battery power.
Turbidity Sensor Cleaning and Use
To maintain accurate readings with your turbidity sensors the
lenses should be cleaned a minimum of once per week. Depending
on the monitoring site, the turbidity sensor's lenses may need
to be cleaned as much as once per day. The turbidity sensor has
been designed for harsh field conditions and uses the latest
manufacturing design technology, however in applications where
constant monitoring is needed, Global Water recommends that the
turbidity sensor should not be kept submerged for more than one
month at a time.