HI96731 portable photometer is used for zinc measurement. Hanna's portable photometers use an advanced optical system; the combination of a special tungsten lamp, narrow-band interference filter, and 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 measuring 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 read the reading. This feature ensures consistency among multiple users.
Indexing indentation on the meter - the meter has an indentation that allows a lock and key to fit with the cuvette cap. This ensures that the cuvette is consistently indexed (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 battery waste if the meter is accidentally left on.
Battery status indicator
The instrument has a battery level indicator to show reaming life as follows:
•3 lines, 100% capacity
•2 lines, 66% capacity
•1 line, 33% capacity
•When the battery is below 10%, the battery icon will flash.
Measurement units - the appropriate measurement unit is displayed together with the reading.

1248/10000
Real-time translation
Swipe translation
Zinc is usually introduced into drinking water through industrial wastewater, especially due to dezincification of brass and deterioration of galvanized iron. In addition to drinking water, zinc is also used in surface treatment, boilers and cooling towers, water conditioning, and wastewater.
HI96731 uses the zinc control method from Standard Methods for the Examination of Water and Wastewater (20th edition) to measure zinc concentrations less than 3.00 mg/L (ppm). When reagent is added to a sample containing zinc, the sample changes from brown-green to blue; the greater the concentration, the deeper the color. The related color change is then analyzed colorimetrically according to 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 silver, a 575 nm (yellow-green) narrow-band interference filter allows only the silicon photodetector to detect yellow-green light while ignoring all other visible light emitted from the tungsten lamp. 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

The HI96731-11 CAL Check^™ standards are used for calibration and performance verification of photometers with the CAL Check^™ function.

Supplied with Certificate of Analysis

• Lot number
• Expiration date
• Standard value @ 25 °C
• Reference meter NIST traceable

Provided storage containers

• Light tight
• Protects from accidental breakage
• 

• SKU	HI96731
  Product Name	Zinc Portable Photometer - HI96731
  Quote Required	Yes
  Zinc Range	0.00 to 3.00 mg/L (ppm)
  Zinc Resolution	0.01 mg/L
  Zinc Accuracy	±0.03 mg/L ±3% of reading
  Zinc Method	adaptation of the Standard Methods for the Examination of Water and Wastewater, 20th edition, zincon method
  Photometer/Colorimeter Light Source	tungsten lamp
  Photometer/Colorimeter Light Detector	silicon photocell with narrow band interference filter @ 575 nm
  Battery Type/Life	9V battery
  Automatic Shut-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.)
  Dimensions	193 x 104 x 69 mm (7.6 x 4.1 x 2.7”)
  Ordering Information	HI96731 is supplied with sample cuvettes (2) with caps, 9V battery, instrument quality certificate and instruction manual. CAL Check™ standards and testing reagents sold separately.