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Description
HM Digital® Hydro MasterHydroMaster Digital tester makes monitoring water easier than ever by reading the levels that matter most and providing accurate readings that you can depend on. Continuous pH EC TDS Temp monitor with rechargeable battery. Portable, wall mount or benchtop use. Tests pH at a range of 0 pH 14 pH, temperatures from 30F 176F, TDS from 0 9999 ppm and EC from 0 9999 S. Stores up to 20 measurement readings, so you can monitor changes over time. LCD touch
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Best in 7 days
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Best in 7 days
4.1 ★★★★★
Based on 2372 reviews
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Product Reviews
★★★★★ 5
Excellent
Format: Paperback
Happy to have this
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 25, 2025
★★★★★ 5
As advertised.
Format: Paperback
As advertised.
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Reviewed in the United States on May 14, 2025
★★★★★ 5
Great Reference
Format: Paperback
This is an excellent, concise book with easy-to-read excerpts and diagrams that we are keeping as a reference guide for our Search and Rescue Team, some of whom are Wilderness First Responders but sometimes need additional information.
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Reviewed in the United States on February 15, 2022
★★★★★ 3
As advertised, Good Price.
Format: Paperback
As advertised. Good price.
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Reviewed in the United States on April 5, 2025
★★★★★ 5
A must-read for OBE enthusiasts
Format: Paperback
Projection of the Astral Body
I recently read The Projection of the Astral Body by Sylvan Muldoon and Hereward Carrington, and it’s a captivating classic! Published in 1929, Muldoon’s firsthand accounts of out-of-body experiences (OBEs) are vivid and pragmatic, detailing his involuntary projections from age 12 and experiments thereafter. His explanations of the astral cord, travel sensations, and the hypnagogic state are clear, avoiding excessive mysticism. Carrington’s scientific editing adds credibility. My only critique: the dated language can be dense, and the small font in some editions strains the eyes. A must-read for OBE enthusiasts
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Reviewed in the United States on August 8, 2025
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