เครื่องวัดความกระด้างในน้ำ HI96735 Total Hardness

Details

The HI96735 portable photometer is for the measurement of total hardness. Hanna's portable photometers feature an advanced optical system; the combination of a light emitting diode (LED), a narrow band interference filter, and silicon photodetector ensure accurate photometric readings every time. The Hanna exclusive CAL Check™ feature utilizes ready-made, NIST traceable standards to verify both meter validation and calibration. The exclusive 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 for performance verification and calibration of the meter using a CAL Check NIST traceable secondary standard.

GLP - Records the date of the last user calibration performed.

Built in timer - Ensures the appropriate reaction time is used for the chemical reaction. At the end of the timer the meter will automatically take the reading. This feature ensures consistency across multiple users.

Indexing indent on meter - The meter has an indent that allows for a lock and key fit with the cuvette cap. This ensures that the cuvette is indexed consistently (same position) in order to maintain the same path length for accurate results.

Cooling Lamp Indicator - It is necessary to maintain a consistent temperature of the optical components in order to maintain a narrow wavelength band of light. This photometer has a cooling lamp indicator that is displayed for a short period of time before each measurement in order to allow the components to cool and obtain the highest accuracy possible.

Error messages - Messages on display alerting to problems including no cap, over range and under range readings, and light source error.

Auto-shut off - Automatic shut off after 10 minutes of non-use when the meter is in measurement mode. Prevents wastage of batteries in the event the meter is accidentally not turned off.

Battery status indicator

Absorbance Specifications

Light Source	light emitting diode
Light Detector	silicon photocell with narrow band interference filter @ 466 nm

Total Hardness Specifications

Hardness Range	Hardness LR: 0 to 250 mg/L; Hardness MR: 200 to 500 mg/L; Hardness HR: 400 to 750 mg/L (ppm) CaCO₃
Hardness Resolution	1 mg/L from 0 to 100 mg/L, 5 mg/L from 100 to 750 mg/L (ppm) CaCO₃
Hardness 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 Method	adaptation of the EPA recommended method 130.1

Additional Specifications

Auto-off	after ten minutes of non-use in measurement mode; after one hour of non-use in calibration mode; with last reading reminder
Environment	0 to 50°C (32 to 122°F); RH max 95% non-condensing
Weight	360g (12.7oz.)
Battery Type	9V battery
Dimensions	193 x 104 x 69 mm (7.6 x 4.1 x 2.7”)
Ordering Information	HI96735 is supplied with sample cuvettes (2) with caps, 9V battery, instrument quality certificate and instruction manual. CAL Check™ standards and testing reagents sold separately.