Hanna HI-96725 Chlorine, Cyanuric Acid, and pH Portable Photometer

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Product Description

Hanna HI-96725 Chlorine, Cyanuric Acid, and pH Portable Photometer

The HI-96725 portable photometer is for the measurement of free and total chlorine, cyanuric acid, and pH. 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.

The HI96725 measures four parameters that are crucial in monitoring for preventive maintenance or disinfection. Chlorine is the most commonly used water disinfectant used by homeowners, hotels, and commercial businesses. In cooling towers, pools and spas, and similar applications, cyanuric acid helps to stabilize chlorine and prevent its breakdown, especially in sunlight. Frequent testing of both cyanuric acid and pH helps to minimize chlorine consumption.

The HI96725 offers multiple methods within one meter. Chlorine determination uses an adaptation of the DPD method; pH determination uses the phenol red method; cyanuric acid determination uses an adaptation of the turbidimetric method. The reagents are in powder and liquid form depending on the parameter being tested.

When the appropriate reagent is added to the sample, it will display a color change; 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 determination of all four parameters, 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 HI96725 is available as a kit (HI96725C) which includes:

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

*Reagents ordered separately

CAL Check™ standards with certificate

The CAL Check™standards are used for calibration and performance verification of photometers with the CAL Check™ function. Individual sets of CAL Check™ standards are available for the HI96725:

  • Free Chlorine: HI96701-11
  • Total Chlorine: HI96711-11
  • Cyanuric Acid: HI96722-11
  • pH: HI96710-11

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-96725 Chlorine, Cyanuric Acid, and pH Portable Photometer :

SKU HI96725-web
PRODUCT NAME Chlorine, Cyanuric Acid, and pH Portable Photometer – HI96725
QUOTE REQUIRED Yes
PH RANGE 6.5 to 8.5 pH
PH RESOLUTION 0.1 pH
PH ACCURACY ±0.1 pH
PH METHOD phenol red method
FREE CHLORINE RANGE 0.00 to 5.00 mg/L (ppm) Cl2
FREE CHLORINE RESOLUTION 0.01 mg/L under 3.50 mg/L; 0.10 mg/L over 3.50 mg/L
FREE CHLORINE ACCURACY ±0.03 mg/L ±3% of reading
TOTAL CHLORINE RANGE 0.00 to 5.00 mg/L (ppm) Cl2
TOTAL CHLORINE RESOLUTION 0.01 mg/L under 3.50 mg/L; 0.10 mg/L over 3.50 mg/L
TOTAL CHLORINE ACCURACY ±0.03 mg/L ±3% of reading
CHLORINE METHOD adaptation of the USEPA method and Standard Method 4500-Cl G
CYANURIC ACID RANGE 0 to 80 mg/L (ppm) cyanuric acid
CYANURIC ACID RESOLUTION 1 mg/L
CYANURIC ACID ACCURACY ±1 mg/L ±15% of reading
CYANURIC ACID METHOD adaptation of the turbidimetric method
PHOTOMETER/COLORIMETER LIGHT SOURCE tungsten lamp
PHOTOMETER/COLORIMETER LIGHT DETECTOR silicon photocell with narrow band interference filter @ 525 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 HI96725 is supplied with sample cuvettes (2) with caps, 9V battery, instrument quality certificate and instruction manual.

 

Hanna HI-96725 Chlorine, Cyanuric Acid, and pH Portable Photometer Manual 

 


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