Calcium Hardness Portable Photometer

SKU : 783bca5c4042

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The HI96720 Calcium Hardness Portable Photometer combines accuracy and ease of use in an ergonomic, portable design. A user can accurately determine the concentration of calcium hardness within a 0.00 to 2.70 mg/L (ppm) range using the HI93720-0 ready made reagents. The HI96720 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

*Products classified as Dangerous Goods can only be shipped via ground.

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Deskripsi

The HI96720 portable photometer is for the measurement of calcium hardness. 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 remaining 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.

optical-system-portable-photometer

Water, with exception to distilled water, contains dissolved salts (magnesium and calcium carbonates). The concentration of these salts determines the water hardness, which can be expressed in calcium carbonate or magnesium carbonate. The sum of these two represents the total hardness level. In addition, water hardness is also related to the phenomenon of pipe rusting in water heating and cooling systems, reverse osmosis, and demineralization plants.

The HI96720 uses an adaptation of the Standard Methods for the Examination of Water and Wastewater, 18th edition, calmagite method to measure calcium hardness concentrations of less than 2.70 mg/L (ppm). When the reagent is added to samples containing calcium salts, the the sample will turn a red 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 calcium hardness 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.

hi96700C

The HI96720 is available as a kit (HI96720C) which includes:

  • Portable Photometer
  • Sample cuvettes (2)
  • Caps (2)
  • CAL Check™ standards with certificate
  • Cuvette cleaning cloth
  • 1 mL syringe with tip
  • Rugged carrying case
  • Carrying case has thermoformed insert for meter and accessories

*Reagents ordered separately

Cal-Chck-yellow

CAL Check™ standards with certificate

The HI96720-11 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

HI96-series-steps-2

 

 

 

Specification NameDetail
skuHI96720
Hardness, Calcium Range0.00 to 2.70 mg/L (ppm) calcium hardness
Hardness, Calcium Resolution0.01 mg/L
Hardness, Calcium Accuracy±0.11 mg/L ±5% of reading
Hardness, Calcium Methodadaptation of the Standard Methods for the Examination of Water and Wastewater, 18th ed. Calmagite method
Light Sourcetungsten lamp
Light Detectorsilicon photocell
Power Supply9V battery
Auto-offafter ten minutes of non-use in measurement mode; after one hour of non-use in calibration mode; with last reading reminder
Environment0 to 50°C (32 to 122°F); RH max 95% non-condensing
Dimensions192 x 104 x 69 mm (7.6 x 4.1 x 2.7”)
Weight320g (11.3 oz.)
Warranty 2 years