The Connection Between pH and ORP - What You Don't Know Can Hurt You.

The two most basic measurements in water quality, pH and ORP, are inextricably connected. The relationship is amazingly simple. One goes up and the other goes down. Yet few people understand it and they do so at their own peril.

The Connection Between pH and ORP - What You Don't Know Can Hurt You.

The two most basic measurements in water quality, pH and ORP, are inextricably connected. The relationship is amazingly simple. One goes up and the other goes down. Yet few people understand it and they do so at their own peril.

The Story Behind the 2250 Controller

I promised myself I would not make use of my blog for blatant promotion of our products. That said, we just released the 2250 controller and the long, tough saga that led up to it is finally at an end. I have this need to tell the story behind the 2250—the good, the bad and the ugly. If I promote so be it. It’s my blog.

AM-2250 and AM-2250TX - NEW!

The AM-2250 replaces the Shark-120 and Shark-240. The AM-2250TX replaces the Shark TX.


AquaMetrix has been making analyzers for over three decades. In 1990 the 2200 series debuted and have been so highly regarded for their durability that most are still in use and customers still insist on sending orders for them. The Shark controller and Shark TX transmitter were introduced in 2006 as multi-parameter analyzers that switch between pH, ORP, conductivity and flow.

The Amazing and Miraculous Slicing and Dicing Splicesome

Several months ago a blogging expert told me that I needed to write content that is more relevant to the field of water quality instrumentation. His advice became a New Year’s resolution and, on New Year’s Day, I am breaking it.

How a New Contractor Model Can Change the Way We Develop New Products

I can now admit it. My company lost $400,000 on two engineering projects that went nowhere. Both were in pursuit of a multi-input, web-enabled controller that was going to be a game changer. The first attempt was entrusted to an engineering veteran in the industry whose actual expertise was woefully short of his advertised expertise. The second effort was in the hands of a very capable firm that viewed me as an ATM. What started off as a $150K project was headed toward $600K.

I finally figured out how a dissolved oxygen sensor works

The title of this blog looks like a self-inflicted wound. It suggests that I am ignorant about how one of the most basic tools in the water quality tool box works.
It’s true.
I have a PhD in physical chemistry. I’ve been in the water business now for 6 years. I am almost finished writing a book on water quality instrumentation that will be published by AWWA. And, until recently, I didn’t know how a dissolved oxygen sensor works.

The Joy of Jargon

Every profession has its fill of technical jargon that few outsiders understand. Since war paint has become so yesterday, these odd assortments of letters have helped bond us together.

What I learned from Radio Shack (RIP)

I am old enough to remember the Radio Shack that was really a radio shack. This was the place where kids in my Dad's generation would go to build or repair ham radios. And though I am quick to admit that I was never an electronics whiz kid I knew a resistor from a capacitor and I knew that you could find just about any electronic component in a Radio Shack. When "Hi-Fi" stereo became a fixture in the sixties the Realist product line of receivers and speakers became a solid middle-of-the road staple in many a living room.

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