Did you wear out or lose your Hach lab catalog? Maybe you prefer to browse on your computer, tablet, or smartphone? Were you aware that we had a digital version you can look at? Browse, search, or shop directly from the digital version.
As part of our weekly specials, Hach will offer a 20% rebate on a new HQd pH, DO or conductivity meter, and a 10% rebate on portable and laboratory turbidimeters if you send in your old non-Hach equipment to be recycled. To take advantage of this offer, download the form at this link http://www.hach.com/promos, purchase your new instrument, send in your old equipment with the form.
Attend the Water Quality Virtual Tradeshow and earn Professional Development Hours, hear expert interviews with Water Online Radio, and network with other water quality professionals without having to leave your chair! Content will focus on municipal, industrial and environmental water treatment. Register now and attend the show Nov. 6th. http://www.waterqualityexpo.com/
Explore the significance of Adenosine Triphosphate (ATP), the application of its measurement in water treatment and distribution systems, and a step-by-step description of a second generation ATP measurement method that can be completed quickly and easily in the lab or in the field.
When using your conductivity probe, you want to make sure you are getting the best performance and most accurate results possible. Additionally, you want your probe to last as long as can be reasonably expected.
But what probe is right for you?
What is the best cleaning option? How graphite cleaning different from platinized?
Take a look at this conductivity probe maintenance and cleaning guide for selection, cleaning and storage.
Biochemical Oxygen Demand (BOD) analysis can be troublesome. Technology keeps evolving to improve the test time requirements and overall efficiency. Complicated titration methods have slowly given way to membrane based probes. The next step of the lab BOD technology evolution is a probe with an integrated stirrer that fits United States EPA-Based BOD test methods using the standard 300 ml US bottles.
Due to the surface of the platinum sensor, oxidation state, or interference in the sample matrix, it is likely that two ORP electrodes will not provide the same measurement result in similar samples. The factors above can influence the response and measured potential (in mV) of the sensor. Differences observed in laboratory and in-plant sampling can be as small as several milliVolts or greater than 50 mV. Treatment application and sample type can also influence electrode variability and response time.
The new application note, "ORP Measurement" in the Resources section of the site addresses the challenge of ORP measurement.
In 2011 things weren’t running according to plan at the Dallas County Water & Sewer Authority (DCWSA). The facility, a 6MGD, grade three conventional wastewater treatment plant serving a population of approx. 43,000, was under an order of consent from the Alabama Department of Environmental Management (ADEM) for continually exceeding a number of NPDES permit limits. The operators needed a better way to monitor and control their system to maintain compliance. After learning about and adopting Hach’s simplified-TKN (s-TKN) method, they found that they could use up-to-date information to make adjustments to their processes that significantly reduced effluent ammonia and TKN levels while saving their facility nearly $25 per TKN test.