Product Overview

• HI96752 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 HI96752 portable photometer is used for the measurement of calcium and magnesium. Hanna's portable photometers use an advanced optical system; the combination of an LED light source, 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 validation 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 take a reading. This feature ensures consistency between multiple users.

• Indexing notch on the meter - the meter has a notch that allows a lock and key to engage with the cuvette cap. This ensures that the cuvette is consistently indexed (in the 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 battery life, as follows:

• 3 bars, 100% capacity

• 2 bars, 66% capacity

• 1 bar, 33% capacity

• When the battery level is below 10%, the battery icon will flash.

• Measurement units - the appropriate measurement unit is displayed together with the reading.

• Significance of use

• Calcium and magnesium both play important roles in plant growth. Calcium helps plant root development and increases the resistance and strength of plant tissues and stems. Magnesium is an indispensable mineral that helps produce chlorophyll, a green pigment that absorbs light and is the plant's energy source. It also increases vitamin concentration and helps with phosphorus uptake in plants.

• The HI96752 offers multiple methods in one meter. Calcium is determined using the oxalate method; magnesium is determined using the calmagite method. The ready-made reagents are in liquid form. When the appropriate reagent is added to the sample, a color change occurs due to the presence of calcium or magnesium; the greater the concentration, the deeper the color. 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 determination of calcium and magnesium, 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 transmittance decreases.

• CAL Check™ standards with certificate

• CAL Check™ standards are used for calibration and performance verification of photometers with the CAL Check™ feature. Each parameter on the HI96752 has a separate CAL Check™ standard set:

• Calcium: HI96752-11

• Magnesium: HI96754-11

• Certificate of analysis provided

• Lot number

• Expiration date

• Standard value at 25°C

• NIST-traceable reference meter

• Storage container provided

• Light-proof

• Protects against accidental breakage