Hanna Instruments HI93102 Portable Multiparameter Turbidity and Ion Specific Meter

The HI93102 is a portable multiparameter meter that also measures iodine, bromine, low range iron, free and total chlorine, cyanuric acid, pH, and turbidity.

This meter features a portable, ergonomic design that blends accuracy and usability. After calibration with AMCO-AEPA-1 standards, a user can determine turbidity with accuracy; ready-made reagents can also be used to determine free chlorine, total chlorine, cyanuric acid, pH, iodine, bromine, and low range iron.

EPA Compliant Turbidity Method
Custom Calibration Points
Logging Mode

Categories: Ions, Turbidity

Description

The Hanna HI93102 portable meter can test the most crucial variables required for water analysis, particularly in drinking water. This device measures turbidity as well as pH, cyanuric acid, free and total chlorine, iodine, bromine, and low range iron. A complex but user-friendly microcontroller allows for quick and accurate measurements. Users have the option of choosing from pre-programmed calibration values or from custom calibration points at a given concentration or relative absorbance of the sample.

The HI93102 has a lot of characteristics that make it appealing for usage in both laboratory and outdoor situations. To maintain a constant path length, the unique cuvette locking system makes sure that the cuvette is put into the measurement cell at the same location each time. The time and date can be saved in memory along with up to 25 measured samples. It is now possible to offer unmatched precision and quality in a portable machine that weighs just one pound because to the miniaturization of electronics.

Features at-a-glance

AMCO AEPA-1 Primary Turbidity Standard – The AMCO AEPA-1 standards for the turbidity range of the HI93102 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.

Logging – The HI93102 allows users to log up to 25 measurement readings. Measurement logs can easily be recalled with the press of a button and a reminder will appear if the memory becomes full. The logging mode can be enabled or disabled.

GLP – With a press of the “GLP” button on the face of the meter, users can view the date, time, and two calibration values of the current mode.

Auto-shut Off – Automatic shut off is selectable after 10, 20, 30, 40, 50, or 60 minutes of non-use when the meter is in measurement mode. This feature prevents wastage of batteries in the event the meter is accidentally left on.

Battery Status Indicator – The status of the battery is monitored during every measurement cycle. An indicator will warn the user when the amount of battery life left is not sufficient to take reliable measurements.

Error Codes – Helpful diagnostic codes appear on the display alerting to problems including low light, high light, or sample out of range.

Significance of Use

To guarantee good water quality in drinking water, wastewater, and water used for pools and spas, it is important to test for turbidity, free and total chlorine, cyanuric acid, pH, iodine, bromine, and low range iron.

One of the most crucial factors used to assess the quality of drinking water is turbidity. There is significant evidence that reducing turbidity is an effective defense against infections, despite it once being thought of as a mostly aesthetic property of drinking water. Turbidity measurements are made in natural water to assess the water’s general quality and suitability for uses involving aquatic creatures.

One of the most widely utilized disinfectants for water treatment is chlorine. It can be supplemented with a variety of substances, such as calcium hypochlorite, sodium hypochlorite, or even chlorine gas. Chlorine reacts with water to form hypochlorous acid (HOCl), which then separates into hypochlorite ion (OCl-).

HOCl ↔ H⁺ + OCl^–

hypochlorous acid ↔ hydrogen ion + hypochlorite ion

HOCl is a stronger disinfectant than OCl-, the other type of chlorine. The pH of the water must be considered to ensure that the additional chlorine is efficient at sanitizing. HOCl and OCl- are present in roughly equal levels at pH 7.5. Above pH 7.5, the equilibrium moves in favor of OCl-; below pH 7.5, it shifts in favor of HOCl. Depending on the application, adding chlorine to water with a pH value of neutral or slightly acidic is effective.

Chlorine is initially introduced to water as free chlorine. The amount that is accessible for disinfection is indicated by the measurement of free chlorine. When chlorine starts to kill the bacteria and pathogens in the water, it turns into combined chlorine, which can no longer be used as a disinfectant. Total chlorine is calculated as the sum of free chlorine and mixed chlorine. A drinking water operator or pool owner can assess whether there is adequate chlorine present for disinfection using both free and total chlorine readings.

The main use of cyanuric acid is as a stabilizing agent for chlorine. It is frequently used in spa and swimming pool treatment regimens to sluggish hypochlorous acid breakdown The effects of UV radiation speed up this process in outdoor pool settings. When used correctly, it can reduce chlorine usage in pools by up to 80% during the busiest months.

Because it is less flammable and more stable than chlorine, bromine works well as a sanitizer in drinking water systems as well as a disinfectant in swimming pools, spas, and hot tubs. Similar to chlorine, excessive concentrations of bromine in water can be harmful to health and irritate the eyes. Daily bromine concentration monitoring helps to optimize and efficiently run the operation while increasing user safety and preventing equipment damage.

Low levels of iron are found naturally in water, while substantial levels are found in wastewater effluents. Water’s iron content needs to be checked because, above a certain level, it becomes dangerous. For instance, iron in household water can stain clothing, corrode kitchenware, encourage the growth of specific germs, and unfavorably change the flavor of water. In water cooling and heating systems, iron is another sign of continuous corrosion. Additionally, iron levels in mine wastewater are typically checked to prevent pollution.

Principle of Operation

When measuring turbidity, 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 HI93102 includes an LED light source and a scattered light detector (90°).

Principle of Operation: Colorimetric Mode

A parameter-specific reagent is introduced to the sample for measuring certain ions in colorimetric mode, causing a color shift; the darker the color, the higher the concentration. The Beer-Lambert Law is then used to colorimetrically examine the resulting color change. According to this concept, light is absorbed by a complimentary hue, and the amount of radiation that is emitted depends on the concentration.

A narrow band interference filter at 525 nm (green) excludes all other visible light output from the light source, allowing only green light to be detected by the silicon photodetector for the purpose of determining free and total chlorine, cyanuric acid, pH, iodine, bromine, and low range iron. The absorbance of the particular wavelength of light increases together with the color change of the reacting sample, whereas transmittance decreases.

More Information
SKU	HI93102
Product Name	Portable Multiparameter Turbidity and Ion Specific Meter – HI93102
Quote Required	Yes
pH Range	5.9 to 8.5 pH
pH Resolution	0.1 pH
pH Accuracy	±0.1 pH
pH Method	Phenol red method. The reaction with reagents causes a red tint in the sample.
Turbidity Range	0.00 to 50.0 NTU
Turbidity Resolution	0.01 (0.00 to 9.99); 0.1 NTU (10.0 to 50.0)
Turbidity Accuracy	±0.5 NTU or ±5% of reading (whichever is greater)
Turbidity Calibration	two-point; selectable between 0.00 – 50.0 FTU (0.00 and 20.0 FTU recommended)
Turbidity Light Source	pure green LED
Turbidity Light Detector	silicon photocell
Bromine Range	0.00 to 8.00 mg/L
Bromine Resolution	0.01 mg/L
Bromine Accuracy	±0.08 mg/L (ppm); ±3% of reading
Bromine Method	Adaptation of the Standard Methods for the Examination of Water and Wastewater, 20th edition, DPD method. The reaction between bromine and the reagent causes a pink tint in the sample.
Free Chlorine Range	0.00 to 2.50 mg/L
Free Chlorine Resolution	0.01 mg/L
Free Chlorine Accuracy	±0.03 mg/L (ppm); ±3% of reading
Total Chlorine Range	0.00 to 3.50 mg/L
Total Chlorine Resolution	0.01 mg/L
Total Chlorine Accuracy	±0.03 mg/L (ppm); ±3% of reading
Chlorine Method	adaptation of the USEPA method 330.5 and Standard Method 4500-Cl G. The reaction between chlorine and the reagents causes a pink tint in the sample.
Cyanuric Acid Range	0 to 80 mg/L
Cyanuric Acid Resolution	1 mg/L
Cyanuric Acid Accuracy	±1 mg/L (ppm); ±15% of reading
Cyanuric Acid Method	Adaptation of the turbidimetric method. The reaction between cyanuric acid and the reagent causes a white suspension in the sample.
Iodine Range	0.0 to 12.5 mg/L
Iodine Resolution	0.1 mg/L
Iodine Accuracy	±0.1 mg/L (ppm); ±5% of reading
Iodine Method	Adaptation of the Standard Methods for the Examination of Water and Wastewater, 20th edition, DPD method. The reaction between iodine and the reagent causes a pink tint in the sample.
Iron Range	0.00 to 1.00 mg/L
Iron Resolution	0.01 mg/L
Iron Accuracy	±0.02 mg/L (ppm); ±3% of reading
Iron Method	Adaptation of the TPTZ method. The reaction between iron and the reagent causes a violet tint in the sample.
Photometer/Colorimeter Light Source	pure green LED
Photometer/Colorimeter Light Detector	silicon photocell
Battery Type/Life	4 (1.5V) AA / approximately 60 hours of continuous use or 1000 measurements
Automatic Shut-Off	automatic shut-off selectable after 10, 20, 30, 40, 50 or 60 minutes of non-use
Environment	0 to 50°C (32 to 122°F); RH max 95% (non condensing)
Weight	510 g (1.1 lb.)
Dimensions	220 x 82 x 66 mm (8.7 x 3.2 x 2.6’’)
Ordering Information	HI93102 is supplied with measurement cuvette cap, batteries and instruction manual.

Hanna Instruments HI93102 Portable Multiparameter Turbidity and Ion Specific Meter

Features at-a-glance

Significance of Use

Principle of Operation

Principle of Operation: Colorimetric Mode

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