To calculate the overall star rating and percentage breakdown by star, we do not use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
Best ORP monitor ever I had (I had Milwaukee MW-500 NO GOOD) This one has an excellent quality, heavy duty, reliable,easy-to-use made forever Extremely easy to set-up. With very good price-tag! I would definitely recommend to a friend without hesitation!