HANNA Instruments Logo
SKU HI96728 Category

Nitrate Photometer - HI96728

The HI96728 Nitrate Photometer combines accuracy and ease of use in an ergonomic, portable design. A user can accurately determine the concentration of nitrate as nitrogen in samples within a 0.0 to 30.0 mg/L (ppm) range using the HI93728-0 ready made reagents. The HI96728 offers many advanced features including the exclusive CAL Check™ function used for performance verification and calibration of the meter.
  • CAL Check™ Validation and Calibration
  • Built-in Timer
  • Automatic Shut Off

Kaufen Sie jetzt mit Vertrauen

 253,00

3 vorrätig

Fordern Sie ein Angebot an

Dieses Produkt kann nicht online gekauft werden. Füllen Sie das Formular aus, um ein Angebot zu erhalten. Vielen Dank.

Details:

The HI96728 portable photometer is for the measurement of nitrate as nitrogen. 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 – Ensures the appropriate reaction time is used for the chemical reaction. At the end of the timer 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.

 

***NOTE: Chloride above 100 mg/L will cause a negative interference with the nitrate chemistry. We do not recommend the HI96728 for measuring nitrate in saltwater.

Nitrogen is abundant in the Earth’s atmosphere and is present in water in the form of nitrate, nitrite, and ammonia. Plants use nitrogen as a nutrient to build proteins by tracking it in through their root system. Nitrate is formed in water mainly through rainfall, decomposition of organic matter, and runoff from manmade pollutants such as sewage waste and fertilizers. Almost all surface waters have a measurable level of nitrate, and a moderate amount is considered beneficial. Large amounts of nitrate, however, can lead to eutrophication which may result in decreased levels of dissolved oxygen in the water.

The HI96728 uses an adaptation of the cadmium reduction method to measure nitrate concentrations of less than 30.0 mg/L (ppm) as nitrogen. When the reagent is added to samples containing nitrate, the sample will turn an amber hue; 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 complementary color, and the emitted radiation is dependent upon concentration. For nitrate-nitrogen determination, a narrow band interference filter at 525 nm (green) allows only 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 HI96728 is available as a kit (HI96728C) 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

*Reagents ordered separately

CAL Check™ standards with certificate

The HI96728-11 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

Specifications

Absorbance 

Light Source

tungsten lamp

Light Detector

silicon photocell with narrow band interference filter @ 420 nm

Nitrate

Range

0.0 to 30.0 mg/L (ppm) NO₃-N (nitrate-nitrogen)

Resolution

0.01 mg/L

Accuracy

±0.5 mg/L ±10% of reading

Method

adaptation of the cadmium reduction method

Battery Type

9V battery

Auto-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

Dimensions

193 x 104 x 69 mm (7.6 x 4.1 x 2.7”)

Weight

360g (12.7oz.)

Notes

Chloride above 100 mg/L will cause a negative interference with the nitrate chemistry. We do not recommend the HI96728 for measuring nitrate in saltwater.

Ordering information

HI96728 is supplied with sample cuvettes (2) with caps, 9V battery, instrument quality certificate and instruction manual.

Zusätzliche Informationen

Zusätzliche Information

Sektor

,

Messgerätsart

Spezifischer Parameter

Angebotsanforderung

Hinweis: Mit * gekennzeichnete Felder sind Pflichtfelder.

Finden Sie nicht, was Sie brauchen?

Wir haben über 3.000 Produkte in unserem Katalog. Registrieren Sie sich jetzt und laden Sie den Katalog herunter oder kontaktieren Sie uns, um zu sehen, ob wir Ihnen helfen können.

Login

Melden Sie sich bei Ihrem Konto an oder erstellen Sie jetzt ein Konto, um auf unsere exklusiven Inhalte zuzugreifen.