Nitrite High Range Portable Photometer - HI96708

SKU: HI96708-web

The HI96708 is no longer available.

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

Both meters use the same reagents.

view new meter

The HI96708 portable photometer is for the measurement of nitrite in a wide variety of water samples. 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.

 

 

photometer optical system


Nitrites can be harmful to aquatic organisms even in low concentrations and for this reason, they are closely monitored in aquaculture facilities. In cooling towers, however, an adequate amount of nitrites is necessary to prevent corrosion. In high concentrations, they can be harmful to the environment and to humans. They are, therefore, normally monitored to verify the quality of water for domestic use, as well as lakes and ponds.  


Nitrites are an intermediate product in the nitrogen cycle and are produced by ammonia oxidation with water, or even originate in industrial waste directly. They must not be present in drinking water.

 

The HI96708 uses an adaptation of the Ferrous Sulfate method to measure nitrite concentrations in the 0 to 150 mg/L (ppm) range. When the reagent is added to samples containing nitrite, the sample will turn a greenish-brown; the greater the concentration, the deeper the color. The associated color change is then colorimetrically analyzed according to the Beer-Lambert Law. This principle states that light is absorbed by a complimentary color, and the emitted radiation is dependent upon concentration. For higher levels of nitrite, a narrow band interference filter at 575 nm (yellow-green) allows only yellow-green light to be detected by the silicon photodetector and omits all other visible light emitted from the tungsten lamp. As the change in color of the reacted sample increases, absorbance of the specific wavelength of light also increases, while transmittance decreases. 

The HI96708 is available as a kit (HI96708C) which includes:

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

CAL Check™ standards with certificate

The HI96708-11 CAL Checkstandards 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
 

 

More Information
SKU HI96708-web
Product Name Nitrite High Range Portable Photometer - HI96708
Quote Required Yes
Nitrite Range 0 to 150 mg/L (ppm)
Nitrite Resolution 1 mg/L
Nitrite Accuracy ±4 mg/L ±4% of reading
Nitrite Method adaptation of the Ferrous Sulfate method
Photometer/Colorimeter Light Source tungsten lamp
Photometer/Colorimeter Light Detector silicon photocell with narrow band interference filter @ 575 nm
Battery Type/Life 9V battery
Automatic Shut-Off after ten minutes of non-use in measurement mode; after one hour of non-use in calibration mode; with last reading reminder
Environment 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Weight 360g (12.7oz.)
Dimensions 193 x 104 x 69 mm (7.6 x 4.1 x 2.7”)
Ordering Information HI96708 is supplied with sample cuvettes (2) with caps, 9V battery, instrument quality certificate and instruction manual.
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