Hanna Instruments Australia
The Hanna Advantage: A Worldwide Leader in Technology and Innovation 100% Quality  360 Value
Sales: (03) 9769 0666   |    Mon to Fri: 8:30am – 5:00pm
Hanna Instruments Australia
Sales: (03) 9769 0666   |    Mon to Fri: 8:30am – 5:00pm

Turbidity (EPA) Portable Meter - HI98703

$2,487.91


Prices include GST. Not all items are in stock. Call 03 9769 0666 to confirm.

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.

Features at-a-glance

Multiple reading modes – Normal measurement, continuous measurement, or signal averaging measurement are reading modes available.

EPA CompliantMeasurement – The HI98703 meets and exceeds the requirements of EPA and Standard Methods for turbidity measurements. When the meter is in EPA mode all turbidity readings are rounded accordingly to meet reporting requirements.

Calibration – A two, three, or four-point turbidity calibration can be performed by using the supplied (<0.10, 15.0, 100, and 750 NTU) standards. Calibration points can be modified if user-prepared standards are used.

AMCO AEPA-1 Primary Turbidity Standard – The AMCO AEPA-1 supplied standards are recognized as a primary standard by the USEPA. These non-toxic standards are made of styrene divinylbenzene polymer spheres that are uniform in size and density. The standards are reusable and stable with a long shelf life.

Fast Tracker™ – For advanced field applications, the HI98703 is equipped with Fast Tracker™ – Tag Identification System (T.I.S.) that makes data collecting and management simpler than ever. Fast Tracker™ allows users to record the time and location of a specific measurement or series of measurements using iButton® tags near sampling points for quick and easy readings. Each iButton® tag contains a computer chip with a unique identification code encased in stainless steel.

GLP Data – The HI98703 features complete GLP (Good Laboratory Practice) functions that allow traceability of the calibration conditions. Data includes calibration points, date, and time.

Data Logging – Up to 200 measurements can be stored in the internal memory and recalled at any time.

Data Transfer – For further storage or analysis options, logged data can be downloaded to a Windows compatible PC using the RS232 or USB port and the HI92000 software.

Backlit Display – A backlit LCD display provides an easy to understand, user-friendly interface. Displayed codes guide the user step-by-step through routine operation and calibration.

Significance of Use

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.
  • Report results as follows:
NTU reading Rounded to nearest
0.0 – 1.0 0.05
1 – 10 0.1
10 – 40 1
40 – 100 5
100 – 400 10
400 – 1000 50
1000 100

The HI98703 meets and exceeds the meter criteria specified by the EPA Method 180.1 and Standard Methods for the Examination of Water and Wastewater 2130 B.

Principle of Operation

The light beam that passes through the sample is scattered in all directions. The intensity and pattern of the scattered light is affected by many variables, such as wavelength of the incident light, particle size and shape, refractive index, and color. The optical system of the HI98703 includes a tungsten filament lamp, a scattered light detector (90°) and a transmitted light detector (180°).

In the ratio turbidimeter range, the microprocessor of the instrument calculates the NTU value from the signals that reach the two detectors by using an effective algorithm that corrects and compensates for interferences of color. The optical system and measuring technique also compensate for fluctuations in lamp intensity, minimizing the need for frequent calibration.

In the non-ratio turbidimeter range, the NTU value is calculated from the signal on the scattered light detector (90°). This method offers a high linearity on the low range but is more sensitive to lamp intensity fluctuations. The lower detection limit of a turbidimeter is determined by stray light that is detected by the sensors but not caused by light scattering from suspended particles. The optical system of the HI98703 is designed to have very low stray light, providing highly accurate results for low turbidity samples.

Turbidity Standards

The HI98703-11 AMCO AEPA-1 standards ensure that measurements are traceable to a primary reference materials. These standards are used for calibration and performance verification of the turbidity meter.

Supplied with Certificate of Analysis

  • Lot number
  • Expiration date
  • Standard value @ 25 °C
  • Reference meter NIST traceable

 

Provided storage containers

 

  • Light tight
  • Protects from accidental breakage
SKU HI98703-02
Name Turbidity (EPA) Portable Meter - HI98703
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 3.4 x 3.0”)
Weight 512 g (18 oz.)

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.

All prices are inclusive of GST and not all items are stock items, if you require an immediate solution please send an email to sales@hannainst.com.au or call us on (03) 9769 0666.

Free standard delivery: We offer free delivery within Australia on orders over $100, typically arriving within 5 to 7 days. Delivery times may vary depending on the courier service and the recipient's location. Free shipping is not available with other offers or discounts.

Same-day despatch: Place your order before 1 PM Monday to Friday for same-day despatch (leaves our warehouse). Delivery times may vary depending on the courier service and the recipient's location. Subject to stock availability.

Please note that we do not offer shipping to PO Box addresses.

Additional information

Weight 2.68 kg
Parameter

Turbidity