Product Overview

• HI96750 is no longer available.

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

• Both meters use the same reagents.

• The HI96750 portable photometer is used for potassium measurement. Hanna's portable photometers use an advanced optical system; the combination of a light emitting diode (LED), a narrow band interference filter, and a silicon photodetector ensures accurate photometric readings every time. Hanna's exclusive CAL Check™ feature uses ready-made NIST traceable standards to verify meter verification and calibration. The dedicated 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 performance verification and calibration of the meter using CAL Check NIST traceable secondary standards.

• GLP - records the date the last user calibration was performed.

• Built-in timer - allows the use of a timer to ensure the chemical reaction uses the appropriate 3 minute 30 second reaction time. When the timer countdown ends, the meter will automatically read the reading. This feature ensures consistency between multiple users.

• Indexing indentation on the meter - the meter has an indentation that allows a lock and key to engage with the cuvette cap. This ensures that the cuvette is consistently indexed (same position) so that the same path length is maintained for accurate results.

• Cooling lamp indicator - in order to maintain narrow band light, it is necessary to keep the temperature of the optical components consistent. This photometer has a cooling lamp indicator that is displayed for a short period before each measurement so that the components can cool and the highest possible accuracy can be obtained.

• Error messages - displayed messages warn of problems, including no cap, over-range and under-range readings, and light source errors.

• Auto shut-off - when the meter is in measurement mode, it automatically shuts off after 10 minutes of non-use. Prevents wasting battery if the meter is accidentally left on.

• Battery status indicator

• The instrument has a battery level indicator to show the remaining life as follows:

• 3 bars, 100% capacity

• 2 bars, 66% capacity

• 1 bar, 33% capacity

• When the battery is below 10%, the battery icon flashes.

• Measurement units - the appropriate measurement unit is displayed together with the 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 plant and animal growth. In many greenhouse, agricultural, and horticultural applications, potassium concentration is important in determining soil quality. Potassium salts are also a common component of fertilizers.

• The HI96750 uses an adaptive method of the tetraphenylborate method to measure potassium concentrations in the low range of 0.0 to 10.0 mg/L (ppm) and the high range of 0 to 100 mg/L. When the reagent is added to a sample containing potassium, the sample becomes turbid; the greater the concentration, the greater the turbidity. The associated color change is then analyzed colorimetrically according to the Beer-Lambert law. This principle states that light is absorbed by the complementary color, and the emitted radiation depends on the concentration. For the potassium determination, a narrow band interference filter at 466 nm (blue) allows only blue light to be detected by the silicon photodetector, while ignoring all other visible light emitted from the LED. As the color change of the reacted sample increases, the absorbance of light at a specific wavelength also increases, while the 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

• The carrying case has thermoformed inserts for the meter and accessories

• *Reagents ordered separately

• CAL Check™ standards with certificate

• HI96750-11 CAL Check™ standards are used for calibration and performance verification of photometers with the CAL Check™ feature.

• Certificate of analysis provided

• Lot number

• Expiration date

• Standard value at 25°C

• NIST traceable reference meter

• Storage container provided

• Lightproof

• Protects against accidental breakage