Hanna HI-96727 Color of Water Portable Photometer

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The HI96727 portable photometer is for the measurement of color of water. Hanna’s portable photometers feature an advanced optical system; the combination of a special tungsten lamp, a narrow band interference filter, and silicon photodetector ensure accurate photometric readings every time. The Hanna exclusive CAL Check^™ feature utilizes ready-made, NIST traceable standards to verify both meter validation and calibration. The exclusive cuvette locking system ensures that the cuvette is inserted into the measurement cell in the same position every time to maintain a consistent path length.

Features at-a-glance :

CAL Check^™ – Allows for performance verification and calibration of the meter using a CAL Check NIST traceable secondary standard.

GLP – Records the date of the last user calibration performed.

Built in timer – Allows the use of a timer to ensure the appropriate 3 minutes and 30 seconds reaction time is used for the chemical reaction. At the end of the timer countdown the meter will automatically take the reading. This feature ensures consistency across multiple users.

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

Cooling Lamp Indicator – It is necessary to maintain a consistent temperature of the optical components in order to maintain a narrow wavelength band of light. This photometer has a cooling lamp indicator that is displayed for a short period of time before each measurement in order to allow the components to cool and obtain the highest accuracy possible.

Error messages – Messages on display alerting to problems including no cap, over range and under range readings, and light source error.

Auto-shut off – Automatic shut off after 10 minutes of non-use when the meter is in measurement mode. Prevents wastage of batteries in the event the meter is accidentally not turned off.

Battery status indicator

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

• 3 lines for 100 % capacity
• 2 lines for 66 % capacity
• 1 line for 33 % capacity
• Battery icon blinks when the capacity is less than 10 %.

Units of measure – Appropriate unit of measure is displayed along with reading.

Used in natural water based applications, such as drinking water and municipal wastewater treatment, the color of water may dictate the presence of both unwanted inorganic and organic material; removal results in more suitable water for general and industrial applications. “Color” is applied in this context to represent “true color”, where turbidity is removed. Where turbidity removal has been omitted, the term “apparent color” is then applied.

The HI96727 uses an adaptation of the Standard Method for the Examination of Water and Wastewater, colorimetric platinum cobalt method to measure color of water at levels less than 500 PCU (Platinum Cobalt Units). The colorimetric test for color of natural water is based on the color gradient of a platinum cobalt solution, where 1 PCU is equivalent to 1 mg platinum/L of solution in the form of the chloroplatinate ion. Once turbidity is removed from the water sample via filtration, “true color” can be compared against deionized water; the greater the concentration, the greater the difference between the blank and filtered sample. The associated color difference is then colorimetrically analyzed according to the Beer-Lambert Law. This principle states that light is absorbed by a complementary color, and the emitted radiation is dependent upon concentration. For color of water determinations, a narrow band interference filter at 420 nm (red) allows only red light to be detected by the silicon photodetector and omits all other visible light emitted from the tungsten lamp. As the difference in color between the blank and filtered sample increases, absorbance of the specific wavelength of light also increases, while transmittance decreases.

The HI96727 is available as a kit (HI96727C) which includes

• Portable Photometer
• Sample cuvettes (2)
• Caps (2)
• CAL Check™ standards with certificate
• Cuvette cleaning cloth
• Scissors
• Rugged carrying case
• Thermoformed insert for meter and accessories

CAL Check™ standards with certificate

The HI96727-11 CAL Check^™standards are used for calibration and performance verification of photometers with the CAL Check™ function.

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

Specifications Hanna HI-96727 Color of Water Portable Photometer :