Total Hardness Photometer Kit – Hanna Instruments HI97735C
The Total Hardness Photometer Kit (HI97735) combines accuracy and ease of use in a simple, portable design. The advanced optical system provides lab-quality accuracy while its user-friendly design is easy for any user making it the perfect photometer for your water quality testing needs. The HI97735 meter measures total hardness in water samples up to 750 mg/L (ppm) CaCO3.
Features:
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Total Hardness Photometer Kit – Hanna Instruments HI97735C
The Total Hardness Photometer Kit (HI97735) combines accuracy and ease of use in a simple, portable design. The advanced optical system provides lab-quality accuracy while its user-friendly design is easy for any user making it the perfect photometer for your water quality testing needs. The HI97735 meter measures total hardness in water samples up to 750 mg/L (ppm) CaCO3.
Features:
Benefits:
The internal reference system of the HI97721 photometer compensates for any drifts due to power fluctuations or ambient temperature changes. With a stable source of light, the readings are fast and stable between your blank (zero) measurement and sample measurement..
LED light sources offer superior performance compared to tungsten lamps. LEDs have a much higher luminous efficiency, providing more light while using less power. They also produce little heat, which could otherwise affect electronic stability.
Improved optical filters ensure greater wavelength accuracy and allow a brighter, stronger signal to be received. The result is higher measurement stability and less wavelength error.
A focusing lens collects all of the light that exits the cuvette, eliminating errors from imperfections and scratches that may be present in the glass. The use of the convex lens reduces the need for indexing cuvettes.
Hanna’s exclusive CAL Check feature allows for performance verification and calibration of the meter 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.
Waiting for the proper reaction time is of key importance when performing colourimetric measurements. The countdown timer displays the time remaining until a measurement is taken, ensuring consistent results between sample measurements and users.
The sample cell of the HI97721 fits a round, glass cuvette with a 25 mm path length. The relatively long path length of the sample cuvette allows the light to pass through more of the sample solution, ensuring accurate measurements even in low-absorbance samples.
The HI97721 is designed with a backlit, graphic LCD. With virtual keys, a battery status indicator, and error messages. Users will find the meter interface intuitive and easy to read. A dedicated help key provides information relating to the current meter operation, and can be used at any stage in the setup or measurement process to show contextual help.
The meter uses three common AA batteries that allow for about 800 measurements to be taken. The auto-off feature automatically shuts off the meter after 15 minutes of inactivity to conserve battery life.
| Catalog Number | Description |
| HI97735 (UNIT ONLY) | – Sample cuvette (2 pcs.) – Sample cap (2 pcs.) – Plastic stopper (2 pcs.) – Alkaline batteries: 1.5V AA (3 pcs.) – Instruction manual – Meter quality certificate |
| HI97735C (KIT) | – Sample cuvette (2 pcs.) – Sample cap (2 pcs.) – Plastic stopper (2 pcs.) – A ZERO ‑ CAL CheckTM Cuvette A – HI97735B – CAL CheckTM Cuvette B for Total Hardness LR, MR, HR – Cloth for wiping cuvettes – Scissors – Alkaline batteries: 1.5V AA (3 pcs.) – Instruction manual – Meter quality certificate – CAL CheckTM standard certificate |
| Hardness, Total Range | Hardness LR: 0 to 250 mg/L; Hardness MR: 200 to 500 mg/L; Hardness HR: 400 to 750 mg/L (ppm) |
| Hardness, Total Resolution | 1 mg/L from 0 to 750 mg/L (ppm) |
| Hardness, Total Accuracy | Hardness LR: ±5 mg/L ±4% of reading; Hardness MR: ±7 mg/L ±3% of reading; Hardness HR: ±10 mg/L ±2% of reading |
| Hardness, Total Method | adaptation of the EPA recommended method 130.1 |
| Light Source | light-emitting diode |
| Light Detector | silicon photocell |
| Bandpass Filter Bandwidth | 8 nm |
| Bandpass Filter Wavelength Accuracy | ±1.0 nm |
| Logging | 50 readings (auto logging) |
| Power Supply | Alkaline 1.5 V AA (3 pcs.) |
| Battery Life | > 800 measurements (without backlight) |
| Auto-off | After 15 minutes of inactivity (30 minutes before a READ measurement) |
| Environment | 0 to 50 °C (32 to 122 °F); 0 to 100% RH, non‑serviceable |
| Dimensions | 142.5 x 102.5 x 50.5 mm (5.6 x 4.0 x 2.0″) |
| Weight | 380 g (13.4 oz.) |
| Warranty | 2 years |
