As with many chemical sensors, the pH and ORP probes gradually lose their active material and need to be replaced after about a year. Good ones aren’t cheap, but [Stephen] has found pretty ...

And, below are also their top recommendations: The leather handy case is a bit useless Require you to wait for the probe in the water before getting ... conversion factor and ATC sensor. With a big ...

President Donald J. Trump’s administration has announced major federal cuts in the name of efficiency, but this has massive repercussions for academic medical researchers and the patients who ...