TM 10-4610-310-14
0002 00
ADDITIONAL EQUIPMENT continued
Turbidity Meter
A battery operated turbidity meter is provided for measuring the turbidity of the source water. The meter covers
a 0 to 1000 Formazine Turbidity Unit (FTU) range in two scales, 0.00 to 50.00 FTU and 50 to 1000 FTU. The
FTU is identical to the Nephelometric Turbidity Unit (NTU). The instrument passes a beam of infrared light
through a vial containing the sample being measured. A sensor, positioned at 90 degrees with respect to the
direction of light, detects the amount of light scattered by the undissolved particles present in the sample. The
microprocessor converts such reading into NTU values. Calibration solution is included with the meter. See
Figure 29.
Figure 29. Turbidity Meter.
