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Aqua Master Tools E50 Pro EC Temperature ElectrodeDescription Aqua Master E50 Pro pH Temp Electrode Directions Directions: Properly unscrew the sealing ring in the lower part of the meter. Remove the defected old electrode by gently pulling it. Carefully place the new electrode with the recess in the correct position so that the connectors properly connect and do not damage the meter or electrode. Check that the rubber seal is properly placed. Tightly tighten the sealing ring. Calibrate the meter as
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4.8 ★★★★★
Based on 1876 reviews
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Product Reviews
★★★★★ 5
Must have for Officers
Format: Paperback
Very informative and easy to understand.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 14, 2026
★★★★★ 5
Should be mandatory reading for police academies and be in every cops' patrol bag
This book should be mandatory reading for police academies and be in every cops' patrol bag for quick reference. I am a police officer (8+ years) and stay on top of search and seizure case law as much as possible. This book is easy to read and gets the essential information on everything that has to do with police search and seizure. The topics are easy to find, and all are no more than 1-2 pages. Every sections cites the appropriate case law and offers tips for articulating PC for that type of incident.
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Reviewed in the United States on February 12, 2018
★★★★★ 5
Very helpful for law enforcement
Got this book recently and I am very impressed and happy I purchased it. I will keep this review short and to the point. This book covers everything with various searches including, cars, homes, etc. Anyone that works in law enforcement should pick this up as it provides what you can and cannot do, along with example cases. Great guide for any rookie and even vets that need a refresher.
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Reviewed in the United States on April 10, 2020
★★★★★ 5
A must have for all officers!
This book is a must-have for ALL officers. I use it constantly as my go-to reference for tricky search issues. My sergeant also has a copy and she reads one of the sections (about 1-2 pages) a few times a week during roll call. I hope that the author comes out with another book just with search warrant template language.
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Reviewed in the United States on October 10, 2018
★★★★★ 5
Super informative and relieves some stress over questions that I have
Really informative and will help with a lot of questions that I have and questions that others need answered. Have been taking many blue to gold courses and I’m so intrigued to possibly make this a deep learning process for myself.
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Reviewed in the United States on April 26, 2020