Turbidity (EPA) Portable Meter – HI98703
The HI98703 is a high accuracy (±2% of reading plus 0.02 NTU) Turbidity Portable Meter. The meter is supplied complete with AMCO-AEPA-1 primary turbidity standards used for calibration and performance verification. The HI98703 meets and exceeds the requirements of EPA Method 180.1 and Standard Methods for the Examination of Water and Wastewater 2130 B for turbidity measurements.
- Fast Tracker™ – Tag Identification System (T.I.S)
- USB for data transfer
- Operates on batteries or line voltage
The HI98703 Precision Turbidity Portable Meter is specially designed for water quality measurements, providing reliable and accurate readings, especially in the low turbidity range. The instrument is based on a state-of-the-art optical system which guarantees accurate results, assures long term stability, and minimizes stray light and color interferences. Periodic calibration with the supplied standards compensates for any variations in intensity of the tungsten lamp. The 25 mm round cuvettes composed of special optical glass guarantee the repeatability of turbidity measurements.
Turbidity is one of the most important parameters used to determine the quality of drinking water. Once considered as a mostly aesthetic characteristic of drinking water, significant evidence exists that controlling turbidity is a competent safeguard against pathogens. In natural water, turbidity measurements are taken to gauge general water quality and its compatibility in applications involving aquatic organisms. The monitoring and treatment or wastewater was once solely based on the control of turbidity. Currently, the measurement of turbidity at the end of the wastewater treatment process is necessary to verify that the values are within regulatory standards.
Turbidity of water is an optical property that causes light to be scattered and absorbed, rather than transmitted. The scattering of light that passes through a liquid is primarily caused by the suspended solids present. The higher the turbidity, the greater the amount of scattered light. Even a very pure liquid will scatter light to a certain degree, as no solution will have zero turbidity.
Drinking water treatment plants that obtain water from surface water are required by the EPA to monitor and report the turbidity. Surface water sources include lakes and rivers. The requirements of the nephelometer and reporting measurements according to EPA Method 180.1 are:
- The applicable range is 0-40 nephelometric turbidity units (NTU)
- Light source: Tungsten lamp operated at a color temperature between 2200-3000°K.
- Distance traversed by incident light and scattered light within the sample tube: Total not to exceed 10 cm.
- Detector: Centered at 90° to the incident light path and not to exceed ±30° from 90°. The detector, and filter system if used, shall have a spectral peak response between 400 nm and 600 nm.
- The sensitivity of the instrument should permit detection of a turbidity difference of 0.02 NTU or less in waters having turbidities less than 1 unit.
- The HI98703 meets and exceeds the meter criteria specied by the EPA Method 180.1 and Standard Methods for the Examination of Water and Wastewater 2130 B.
Product Name: Turbidity (EPA) Portable Meter – HI98703
Quote Required: Yes
Turbidity Range: 0.00 to 9.99; 10.0 to 99.9; 100 to 1000 NTU
Turbidity Resolution: 0.01; 0.1; 1 NTU
Turbidity Accuracy: ±2% of reading plus 0.02 NTU
Turbidity Repeatability: ±1% of reading or 0.02 NTU, whichever is greater
Turbidity Stray Light: < 0.02 NTU
Turbidity Calibration: two, three, or four-point calibration
Turbidity Measuring Method: ratio nephelometric method (90° & 180°). Adaptation of the USEPA Method 180.1 and Standard Method 2130 B
Turbidity Measuring Modes: normal, average, continuous
Turbidity Light Source: tungsten filament lamp
Turbidity Light Detector: silicon photocell
Logging Memory: 200 records
Connectivity: USB or RS232
Automatic Shut-Off: auto-off after 15 minutes of non-use
Display: 60 x 90 mm backlit LCD
Battery Type/Life: 4 (1.5V) AA alkaline batteries
Power Supply: 4 (1.5V) AA alkaline batteries or AC adapter
Environment: 0 to 50°C (32 to 122°F), RH max 95% non-condensing
Dimensions: 224 x 87 x 77 mm (8.8 x 3.4x 3.0″)
Weight: 512 g (18 oz.)
Ordering Information: HI98703 is supplied with sample cuvettes and caps (5), HI98703-11 calibration cuvettes, silicone oil, cuvette wiping cloth, batteries, AC adapter, instruction manual, and rugged carrying case.