{"id":11313,"date":"2026-04-15T18:12:29","date_gmt":"2026-04-15T18:12:29","guid":{"rendered":"https:\/\/versicolor.ca\/sandylakebedford\/?page_id=11313"},"modified":"2026-04-15T18:12:29","modified_gmt":"2026-04-15T18:12:29","slug":"on-our-use-of-a-pocket-water-tester","status":"publish","type":"page","link":"https:\/\/versicolor.ca\/sandylakebedford\/waters\/lit-links\/ec-notes\/on-our-use-of-a-pocket-water-tester\/","title":{"rendered":"On our use of a Pocket Water Tester"},"content":{"rendered":"
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Pocket meters used for EC and pH measurements. pH meter comes with pH 4 and 7 calibration solutions. I use a 342 (533 uS\/cm) ppm calibration solution to check the EC meter (it is factory calibrated). More details on the pH meter here<\/a>.<\/p><\/div>\n

I routinely measure electrical conductivity on watercourses that I encounter, and pH of\u00a0 some of them. The EC measurement are made with a pocket HM Digital Aquapro Water Tester AP-2<\/a> which measures electrical conductivity and temperature.*
\n*Available at amazon.ca<\/a> (C$32.59 on Apr13, 2026)<\/small><\/p>\n

It is inserted directly in the water or a sample is placed in a jar and the measurement made immediately.<\/p>\n

I purchased this piece of equipment in June of 2017 specifically for this purpose (cost ~$30). It was factory calibrated with a 700 \u00b5S standard.\u00a0 According to the manual<\/a>,\u00a0 readings are\u00a0 temperature compensated, so they are Specific Conductance values (Electrical Conductivity at 25 deg C). I had no technical issues using it and measurements on a reference sample of tap water were consistent.<\/p>\n

I purchased a second Aquapro Water Tester in July of 2020 and gave to a Sandy Lake Volunteer for use in monthly monitoring<\/a>. In an in-field comparison of the two meters on Oct 2, 2020, the two meters gave identical results. A 342 ppm NaCl standard from HMDigital read 699-704 uS\/cm, Temp 19.4o<\/sup>C (Mar 2, 2021); the ppm 500 scale value<\/a>is 684 uS\/cm. (I assume the standard is HM Digital\u2019s 700 uS\/cm standard they use to factory calibrate these instruments.) View Manual <\/a> for this instrument.<\/p>\n

As of April 2026, both of these instruments are still functioning without issue.<\/p>\n

– david p<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

I routinely measure electrical conductivity on watercourses that I encounter, and pH of\u00a0 some of them. The EC measurement are made with a pocket HM Digital Aquapro Water Tester AP-2 which measures electrical conductivity and temperature.* *Available at amazon.ca (C$32.59 … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":6124,"menu_order":20,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-11313","page","type-page","status-publish","hentry"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/versicolor.ca\/sandylakebedford\/wp-json\/wp\/v2\/pages\/11313","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/versicolor.ca\/sandylakebedford\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/versicolor.ca\/sandylakebedford\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/versicolor.ca\/sandylakebedford\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/versicolor.ca\/sandylakebedford\/wp-json\/wp\/v2\/comments?post=11313"}],"version-history":[{"count":1,"href":"https:\/\/versicolor.ca\/sandylakebedford\/wp-json\/wp\/v2\/pages\/11313\/revisions"}],"predecessor-version":[{"id":11314,"href":"https:\/\/versicolor.ca\/sandylakebedford\/wp-json\/wp\/v2\/pages\/11313\/revisions\/11314"}],"up":[{"embeddable":true,"href":"https:\/\/versicolor.ca\/sandylakebedford\/wp-json\/wp\/v2\/pages\/6124"}],"wp:attachment":[{"href":"https:\/\/versicolor.ca\/sandylakebedford\/wp-json\/wp\/v2\/media?parent=11313"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}