HI98703-01

Turbidity Portable Meter

Name: Turbidity Portable Meter
SKU: HI98703-01
Price: 1238.0 USD
Availability: InStock

$1,238.00

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.

Never miss a measurement with stored logging.
GLP (Good Laboratory Practice) function for calibration traceability.
Specially designed for water quality measurements.

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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 Compliant Measurement - 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 identication 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 specied by the EPA Method 180.1 and Standard Methods for the Examination of Water and Wastewater 2130 B.

light-diagram-2

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.

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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

Resources

Specifications

Specification Name	Detail
sku	HI98703-01
NTU Range	0.00 to 9.99 NTU 10.0 to 99.9 NTU 100 to 1000 NTU
NTU Resolution	0.01 NTU from 0.00 to 9.99 NTU 0.1 NTU from 10.0 to 99.9 NTU 1 NTU from 100 to 1000 NTU
NTU Accuracy	±2% of reading plus 0.02 NTU
Range Selection	Automatic
Turbidity Repeatability	±1% of reading or 0.02 NTU, whichever is greater
Stray Light	< 0.02 NTU
Turbidity Light Detector	Silicon Photocell
Turbidity Method	Ratio Nephelometric signal (90') scatter light ratio transmitted light Adaptation of the USEPA Method 180.1 and Standard Method 2130 B
Turbidity Standards	15, 100 and 750 NTU
Calibration	One, two or three point calibration
Light Source	Tungsten filament lamp
Lamp Life	Greater than 100,000 readings
Display	60 x 90 mm LCD with backlight
LOG Memory	200 records
Serial Interface	RS232 or USB 1.1
Environment	0 to 50 °C (32 to 122 °F); max 95% RH non-condensing
Power Supply	4 x 1.5V AA alkaline batteries or AC adapter
Auto Shut-Off	After 15 minutes of non-use
Dimensions	224 x 87 x 77 mm (8.8 x 3.4 x 3.0”)
Weight	512 g (18 oz.)
Warranty	2 years

Product Manuals

MAN98703_06_19 Download

Turbidity Portable Meter

Features at-a-glance

Significance of Use

Principle of Operation

Resources

Don't Forget!

HI98703 Turbidity Portable Meter Reviews