HI96750 Potassium Portable Photometer

Description

The HI96750 portable photometer is for the measurement of potassium. Hanna’s portable photometers feature an advanced optical system; the combination of a light emitting diode (LED), 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.

Potassium is a chemical element commonly found in nature. It is present in soil and drinking water and is also an essential element for the growth of plants and animals. Potassium concentration is important in determining the quality of soil in many greenhouse, agriculture, and horticulture applications. Potassium salts are also a common component of fertilizers.

The HI96750 uses an adaptation of the tetraphenylborate method to measure potassium concentrations ranging from 0.0 to 10.0 mg/L (ppm) potassium in the low range and 0 to 100 mg/L potassium in the high range. When the reagent is added to samples containing potassium, the sample will become turbid; the greater the concentration, the greater the turbidity. 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 potassium determination, a narrow band interference filter at 466 nm (blue) allows only blue light to be detected by the silicon photodetector and omits all other visible light emitted from the LED. As the change in color of the reacted sample increases, absorbance of the specific wavelength of light also increases, while transmittance decreases.

The HI96750 is available as a kit (HI96750C) which includes:

• Portable Photometer
• Sample cuvettes (2)
• Caps
• CAL Check™ standards with certificate
• Cuvette cleaning cloth
• Scissors
• 1000 mL automatic pipette with tip
• Rugged carrying case
  • Carrying case has thermoformed insert for meter and accessories

  • CAL Check™ standards with certificate

    The HI96750-11 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