Turbidity Sensors Product Description
Sensor Measuring principle
Low turbidity is measured by scattered light. The
number of suspended particles corresponds to the
intensity of scattered light. In order to ensure that
different measuring instruments will yield comparable
results, the standard ISO 7027 (DIN 38404) was drawn up,
stipulating 90° measurement for turbidity (FNU).
Turbidity Sensor Design
The turbidity sensors process an analog signal 4–20 mA
which is supplied by the turbidity sensor's electronics
after compensation of temperature and ambient light. A
mechanical wiper prevents contamination of the turbidity
sensor's measuring windows. The wiper cycle is
controlled by an extern contact and allows you to match
the turbidity sensor's cleaning cycle to your
application. Preprocessing the turbidity sensor's
measurement signal directly in the probe allows the
turbidity probe and analyser to be extended by up to 656
feet (100m). The heavy duty WQ750, turbidity sensors
are constructed of 316 stainless steel with scratch
resistant quartz optical lenses to provide a long,
dependable service life. The turbidity sensors will
even work in seawater with no issues. The turbidity
sensors ships complete with 42 feet of cable and wiper
Turbidity Sensor Installation
Reflections from stationary installations in the area of
the turbidity sensor (e.g. wall, ground) can affect
turbidity measurements at low turbidity levels, causing
the turbidity sensor to give false high turbidity
values. It is important to take account of this when
performing turbidity sensor control measurements in
small vessels. The distance between the turbidity
sensor probe and the next wall should be large enough to
avoid reflections, see the diagram below.
Required mounting clearances
Turbidity Sensors Applications
- Filtration monitoring
- Condensate monitoring
- Industrial water monitoring
- Final effluent of wastewater treatment plants
- Industrial quality control
- and MUCH MORE...
Turbidity Sensors Specifications
Measuring principle: 90°-scattered light with
pulsed infrared light, according to ISO 7027 (DIN 38404)
Wavelength: 880 nm
Measuring range: 1-1000 FNU
Maximum error: < 1% of measuring range
Analog output: 4-20 mA Isolated
Signal filter: 10 sec.
Control signal for wiper: pulse duration 5 sec. /
Power: 10–24 VDC
Sensor current: ~220mA @ 12 VDC
Wiper current: 50 mA
Temperature range: 0-50 °C (32-122 °F)
Operating pressure max.: 6 bar (87 psi) maximum
Sensor body: Stainless steel 1.4571 (SS 316 Ti)
Optical windows: Quartz glass
Cable: 22 AWG 7 conductor with aluminum
foil/tinned copper wire shield
Cable length: 42.5 ft (15m) Size: 1 1/2in
D x 5.75in L (38mm D x 146mm L)
Weight: 2 lbs.
Turbidity Sensors Options
WQ750-1000 Self Cleaning Turbidity Sensor
42' standard cable length.
Turb 430T Portable Turbidity Meter Kit (EPA)
Includes calibration kit (0.02 - 10 - 1000), 2 empty
cuvettes, cleaning tissues, batteries (4 x AA), and
field case with table insert.
TC-3000e Portable Chlorine Meter
Measure Chlorine, Turbidity, and Color in one meter.
U-10-2 Multiparameter Probe
Measures pH, Conductivity, Dissolved Oxygen,
Turbidity, Salinity, and Temperature.
WQS-STD Turbidity Sampling System
NOTE: Turbidity sensor is not included.
Global Water's other
water quality sensors.
GL500 Wind Speed Recorder
Wind Speed recorder for sensor datalogging.
Includes Global Logger Software. With weather proof
enclosure and 12V battery.