Product Overview

• HI96762 is no longer available.

• Below is a link to a new meter that has been upgraded with many advanced features, including an improved optical system, dot matrix LCD, which provides a graphical tutorial mode to help users complete the measurement process, and is waterproof, including the cuvette assembly.

• Both meters use the same reagents.

• The HI96762 portable photometer is used for ultra-low range measurement of free chlorine in various water samples. Hanna's portable photometers use an advanced optical system; the combination of a special tungsten lamp, narrow band interference filter, and silicon photodetector ensures accurate photometric readings every time. Hanna's exclusive CAL Check™ feature uses ready-made NIST traceable standards to verify meter validation and calibration. The dedicated cuvette locking system ensures that the cuvette is inserted into the measuring cell in the same position every time to maintain a consistent path length.

• Features at a glance

• CAL Check™ - allows performance verification and calibration of the meter using CAL Check NIST traceable secondary standards.

• GLP - records the date the last user calibration was performed.

• Built-in timer - allows the use of a timer to ensure the chemical reaction uses the appropriate 3 minute 30 second reaction time. When the timer countdown ends, the meter will automatically read the reading. This feature ensures consistency between multiple users.

• Indexing indentation on the meter - the meter has an indentation that allows a lock and key to fit with the cuvette cap. This ensures that the cuvette is consistently indexed (same position) in order to maintain the same path length for accurate results.

• Cooling lamp indicator - in order to maintain narrow band light, it is necessary to keep the temperature of the optical components consistent. This photometer has a cooling lamp indicator that displays for a short period before each measurement in order to allow the components to cool and obtain the highest possible accuracy.

• Error messages - displayed messages warn of problems, including no cap, over-range and under-range readings, and light source errors.

• Auto shut-off - when the meter is in measurement mode, it automatically shuts off after 10 minutes of non-use. Prevents battery waste if the meter is accidentally left on.

• Battery status indicator

• The instrument has a battery level indicator to show reaming life as follows:

• 3 lines, 100% capacity

• 2 lines, 66% capacity

• 1 line, 33% capacity

• When the battery is below 10%, the battery icon will flash.

• Measurement units - the appropriate measurement units are displayed with the reading.

• Free chlorine is one of the oldest and most common forms of disinfection, and chlorine improves water quality by destroying pathogenic microorganisms and reacting with other organic and inorganic substances. Chlorine levels must be actively monitored to ensure there is sufficient chlorine for disinfection and to control adverse effects such as taste, odor, and the potential to form harmful disinfection by-products with organic matter.

• The HI96762 uses an adaptation of standard method 4500 Cl G to measure free chlorine concentrations less than 0.500 mg/L (ppm). When DPD reagent is added to a sample containing free chlorine, the sample will turn pink; the greater the concentration, the deeper the color. The associated color change is then analyzed colorimetrically according to the Beer-Lambert law. This principle states that light is absorbed by the complementary color, and the emitted radiation depends on the concentration. For free chlorine determination, a 525 nm (green) narrow band interference filter allows only the silicon photodetector to detect green light while ignoring all other visible light emitted from the tungsten lamp. As the color change of the reacted sample increases, the absorbance of light at a specific wavelength also increases, while transmittance decreases.

• The HI96762 is available as a kit (HI96762C), including:

• Portable photometer

• Sample cuvettes (2)

• Caps

• CAL Check™ standards with certificate

• Cuvette cleaning cloth

• Scissors

• Rugged carrying case

• The carrying case has thermoformed inserts for the meter and accessories

• *Reagents ordered separately

• CAL Check™ standards with certificate

• HI96762-11 CAL Check™ standards are used for calibration and performance verification of photometers with the CAL Check feature.

• Certificate of analysis provided

• Lot number

• Expiration date

• Standard value at 25°C

• NIST traceable reference meter

• Storage container provided

• Lightproof

• Protects against accidental breakage