The Global Turbidity Meter is a highly accurate device with a fully submersible sensor for in-situ environmental or process monitoring. The meter is provided with a padded carrying case and 25’ of marine grade cable, with lengths up to 100’ available upon request.
Method:
In accordance with USEPA Method 180.1 for turbidity measurement the sensor is a 90 degree scatter nephelometer where a focused beam is directed into the monitored water. The light beam reflects off particles in the water, and the resultant light intensity is measured by a photodetector positioned at 90 degrees to the light beam. The detected light intensity is directly proportional to the turbidity of the water. The WQ770 sensor utilizes a second light detector to correct for light intensity variations, color changes, and minor lens fouling.
Calibration:
All turbidity meters are factory calibrated to the highest standards and should not need recalibration for 6-12 months. User calibration, when required, is very easy using the step-by-step scaling process within the display unit.

Specifications
Range: 0-50 NTU and 0-1000 NTU Accuracy: + 1 % of full scale
Resolution: 12 bit Method: Nephelometer with correction
Power: Internal 9VDC battery Warm-up Time: 3 seconds minimum Operating Temperature: 32 to 122° F ( 0 to + 50° C) Materials: 306 sainless steel, delrin, Sapphire optical windows, Polyurethane jacketed cable. Pressure: 30 psi max.
Light Source: pulsed LED ( 880nm) Cable Length: Meter= 25' standard ( optional to 100' ) Sensor Size: Body= 1 1/ 2" D x 8.5" L Sensor Shield= 1 1/ 2" x 2" Overall Length: 9" Weight: 2 lbs.