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Constant monitoring of hardness levels is critical in many applications. Water hardness is easily noticed in laundry applications, where its presence greatly reduces the effectiveness of soaps and detergents. High levels of hardness in the water supply is also a major industrial concern. The scaling caused by hard water in pipes and equipment can cause costly loss of efficeincy and result in failure of machinery.
The Hanna HI-93725 pH and Total Hardness Meter is extremely easy to use and gives direct readout on the digital display in mg/L(ppm). To obtain a reading simply take a small sample of water in the glass cuvette supplied, add the reagent (not included), and then place the cuvette in the measuring chamber of the instrument.
| Instruction Manual |
|
| Range |
pH |
5.9 to 8.5 pH |
| Range |
Total Hardness |
0.00 to 4.70 mg/L |
| Resolution |
pH |
0.1 pH |
| Resolution |
Total Hardness |
0.01 mg/L |
| Accuracy |
pH |
±0.1 pH |
| Accuracy |
Total Hardness |
±0.11 mg/L ±5% of reading |
| Light Source |
|
LED 555 nm |
| Light Life |
|
Life of the instrument |
| Light Detection |
|
Silicon Photocell |
| Battery Type / Life |
|
1 x 9V / approx. 40 hours of continuous use;
auto-off after 10 minutes of non use |
| Environment |
|
0 to 50°C (32 to 122°F); RH max 95% non-condensing |
| Dimensions |
|
180 x 83 x 46 mm (7.1 x 3.3 x 1.8") |
| Weight |
|
290 g (10 oz.) |
| Method |
pH |
Phenol red method |
| Method |
Total Hardness |
Adaptation of the Standard Methods for the
Examination of Water and Wastewater, 18th ed. Calmagite/Colorimetric method |
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