East West Infiniti Pvt Ltd.

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Turbidity Sensor and Meter


Global Water’s WQ730 Turbidity Sensor is a highly accurate submersible instrument for in-situ environmental or process monitoring. Applications for the WQ730 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 WQ730 Turbidity Sensors are a 90 degree scatter nephelometer. The WQ730 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 WQ730 utilizes a second light detector to correct for light intensity variations, color changes, and minor lens fouling.

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 site.

  • 4-20 mA output
  • Marine grade cable with strain relief
  • In-situ turbidity measurement
  • Simple and convenient to use
  • Rugged stainless steel and Delrin sensor housing

The Global Water WQ770-B Turbidity Meter combines the WQ730 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 WQ770-B turbidity meter can be used for enivronmental or process sites that do not require permanent monitoring. The WQ770-B will display readings directly in either nephelometric turbidity units (NTU) or parts per million (PPM). The WQ770-B turbidity meter also includes an automatic shutoff feature to conserve battery power.


Range Sensor=0-50 NTU and 0-1000 NTU; Meter=0-50 NTU or 0-1000 NTU selectable
Accuracy +/- 1% of full scale
Meter Resolution 12 bit
Output 4-20mA (Sensor, both ranges), LED screen (Meter)
Method Nephelometer with correction
Operating Voltage 10-36 VDC @ 40 MS (Sensor); Internal 9VDC battery (Meter)
Current Draw 30 mA plus sensor output (Sensor)
Warm Up Time 5 seconds minimum (Sensor)
Operating Temperature 14 to 122°F (-10 to +50°C) (Sensor); 32 to 122°F (0 to +50°C) (Meter)
Materials 306 stainless steel, delrin, polyether jacketed cable
Maximum Pressure 30 psi
Light Source Infrared LED, (880nm)
Cable Length Sensor=25 ft standard (optional to 500 ft)
Size Body= 1 1/2 x 8.5 inches (3.8 x 21.6 cm) (Dia x Length)
Weight 1lb (454 g) (Sensor); 2 lbs (907 g) (Meter+sensor)