HANNA HI 723 Chromium VI High Range Checker

HANNA HI 723 Chromium VI High Range Checker
The Hanna Checker® bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits are not very accurate and only give 5 to 10 points resolution while professional instrumentation can cost hundreds of dollars and can be time consuming to calibrate and maintain. The Checker® is both accurate and affordable.

Details

There are two natural forms of ionic chromium, the hexavalent ion, Cr (VI) and the trivalent Cr (III). Cr (III) is much less toxic than Cr (VI) and seldom found in potable waters. Cr (VI), however, is toxic to humans and is found in water. Even though the toxic effects from Cr (VI) in drinking water are not well documented, it is a suspected carcinogen.
There are many industries that use chromic acid and other forms of Cr (VI) that could be a possible source of Cr (VI) pollution in either water or air or both. One industry that can introduce Cr (VI) to water sources is the chrome-plating industry (for the plating of car bumpers). Chromic acid is used in the electroplating process and can be present in industrial waste waters. Cr (VI) also can enter water supplies from industrial cooling towers where chromic acid is added to the water to inhibit metal corrosion.

The maximum permissible level of Cr (VI) allowed to be released into the waterways is 50 ppb. Its level in drinking water is normally much lower, and a lever higher than 3 ppb is suggestive of industrial pollution. The HI723 and HI749 Checker® Handheld Colorimeters are a simple, accurate, and cost effective way to measure Chromium VI.

Each model is designed for a specific range (Low or High) in order to provide high levels of accuracy. The contoured style of these Checkers fit easily in the palm of your hand or pocket and the large LCD is easy to read. The auto shut-off feature assures the battery life will not be drained if you forget to turn it off.

The HI723 Checker®HC (Handheld Colorimeter) is a simple, accurate, and cost effective way to measure Chromium VI (HR). Designed as a more accurate alternative to chemical test kits, the HI723 provides quick, accurate results in four easy steps:



Features at-a-glance:

• Easier to use and more accurate than chemical test kits
• Dedicated to a single parameter
• Small size, big convenience
• Ideal for: Water quality, Environmental, Plating, Education

Specifications

Parameter	Chromium VI
Range	0 - 999 ppb
Resolution	1 ppb
Accuracy @ 25°C/77°F	±5 ppb ±4% of reading
Light Source	LED @ 525 nm
Light Detector	Silicon photocell
Environment	0 to 50°C (32 to 122°F); RH max 95% non-condensing
Battery Type	(1) 1.5V AAA
Auto-off	after ten minutes of non-use
Dimensions	81.5mm x 61mm x 37.5mm (3.2" x 2.4" x 1.5”)
Weight	64 g (2.25 oz.)
Ordering Information	HI723 Checker® is supplied with (2) sample cuvettes with caps, chromium VI HR reagent starter kit for 6 tests (6 powder reagent packets) , battery, instructions and quick start guide.
Method	adaptaion of the ATSM, Manual of Water and Enviornmental Technology, D 1687-92, Diphenylcarbohydrazide method