Description
The HI97752 is an advanced portable photometer for measuring calcium and magnesium in water. This meter offers a superior optical system that uses a reference detector and narrowband interference filters for extremely fast and repeatable measurements.
Calcium and magnesium play an important role in plant growth. Calcium helps plant roots develop and increases the strength and strength of plant tissues and stems. Magnesium is an indispensable mineral that aids in the production of chlorophyll, the green pigment that absorbs light and serves as a source of energy for plants. It also increases vitamin concentrations and aids in the absorption of phosphorus within the plant’s body.
The HI97752 offers multiple methods within a single meter. Calcium determination uses the oxalate method; Magnesium determination uses the calmagita method. The prepared reagents are in liquid form. When the appropriate reagents are added to the sample, a color change will occur due to the presence of calcium or magnesium; The higher the concentration, the deeper the color. The associated color change is analyzed colorimetrically according to Lambert-Beer’s Law. This principle states that light is absorbed by a complementary color and the radiation emitted depends on the concentration. For calcium and magnesium determination, a narrowband interference filter at 466 nm allows the silicon photodetector to detect only blue light and omits the rest of the visible light emitted by the LED. As the color change of the reacted sample increases, so does the absorbance of the specific wavelength of light, while the transmittance decreases.
The HI97752 has an innovative optical system that offers superior performance in accuracy, repeatability, and the short time it takes to perform a measurement. This compact, waterproof meter is extremely easy to use with a tutorial mode that graphically guides the user step-by-step through performing a measurement. The use of a backlit dot matrix LCD screen allows for the use of virtual keys that make the operation of the meter very intuitive, including the selection of different units of measurement, the review of GLP data, the retrieval of the last 50 measurements, and the customization of the meter according to the user’s preferences.
The HI97752 is completely waterproof, including the bucket holder that is designed with flanges to protect the optical path from tray scratches and a gasketed battery compartment that holds three common AA batteries. The compact design fits comfortably in the hand for use in the field or on a bench for use in a laboratory. The LCD screen is backlit for easy viewing in all conditions.
FEATURES/BENEFITS of the HI97752:
Stable Light Source:
The photometer’s internal reference system HI97752 compensates for any deviations due to energy fluctuations or ambient temperature changes. With a stable light source, readings are fast and stable between measuring the target (zero) and measuring the sample.
High Efficiency Light Source:
LED light sources offer superior performance compared to tungsten lamps. LEDs have a much higher luminous efficiency, providing more light while using less energy. They also produce little heat, which could otherwise affect electronic stability.
High Quality Filters:
Improved optical filters ensure higher wavelength accuracy and allow for a brighter, stronger signal. The end result is greater measurement stability and less wavelength error.
Increased Light Output:
A focusing lens collects all the light that comes out of the bucket, eliminating errors due to imperfections and scratches that may be present in the glass. The use of convex lenses reduces the need to index trays.
CAL Check functionality:
Hanna’s unique CAL Check feature enables verification of meter performance and calibration using NIST-traceable standards. Our CAL Check standard vials are developed to simulate a specific absorbance value at each wavelength to verify the accuracy of subsequent readings.
Large Bucket Size:
The sample cell of the HI97752 fits a round glass cuvette with a path length of 25 mm. The relatively long path length of the sample cuvette allows light to pass through a larger amount of the sample solution, ensuring accurate measurements even in low-absorbance samples.
Intuitive Point Matrix Display:
The HI97752 is designed with a backlit graphic LCD display. With virtual keys, battery status indicator and error messages. Users will find the meter interface intuitive and easy to read. A dedicated help key provides information related to the current operation of the meter and can be used at any stage of the setup or measurement process to display contextual help.
Auto Shutdown Protection:
The meter uses three common AA batteries that allow about 800 measurements to be taken. The auto-off feature automatically turns off the meter after 15 minutes of inactivity to conserve battery life.
Specs:
– Calcium Range: 0 to 400 mg/L (as Ca2+)
– Calcium Resolution: 1 mg/L
– Calcium accuracy: ±10 mg/L ±5% of reading at 25°C
– Calcium Method: Adaptation of the Oxalate Method
– Magnesium range: 0 to 150 mg/L (as Mg2+)
– Magnesium Resolution: 1 mg/L
– Magnesium accuracy: ±5 mg/L 3% of reading at 25°C
– Magnesium Method: Adaptation of the Calmagita Method
-Light Source Photometer/Colorimeter: LED with 466nm bandpass filter
– Light Detector Photometer/Colorimeter: silicon photocell
– Filter Bandwidth: 8 nm
– Wavelength Accuracy Band Filter: ±1.0 nm
– Type of Bucket: 24.6 mm diameter round (22 mm inside)
– LPG: Yes
– Display: 128 x 64 pixel B/W LCD with backlight
– Log Memory: 50 readings
– Battery Type/Duration: 1.5V AA alkaline (3 pcs.)(Not included) /> 800 measurements (without backlight)
– Auto Power Off: after 15 minutes of inactivity (30 minutes before a READ measurement)
– Ambient: 0 to 50°C (32 to 122°F); HR 0 to 100% (IP67)
– Weight: 380 g (13.4 oz.)
– Dimensions: 142.5 x 102.5 x 50.5 mm (5.6 x 4.0 x 2.0″)
