https://support.aperainst.com/support/home 2026-08-30T08:00:43+00:00 always 1.0 https://support.aperainst.com/support/solutions 2026-08-30T08:00:43+00:00 always 0.8 https://support.aperainst.com/support/solutions/14000038274 2026-08-30T08:00:43+00:00 always 0.8 https://support.aperainst.com/support/solutions/14000074628 2026-08-30T08:00:43+00:00 always 0.8 https://support.aperainst.com/support/solutions/14000074629 2026-08-30T08:00:43+00:00 always 0.8 https://support.aperainst.com/support/solutions/folders/14000058278 2026-08-30T08:00:43+00:00 always 0.64 https://support.aperainst.com/support/solutions/folders/14000058279 2026-08-30T08:00:43+00:00 always 0.64 https://support.aperainst.com/support/solutions/folders/14000111401 2026-08-30T08:00:43+00:00 always 0.64 https://support.aperainst.com/support/solutions/folders/14000124279 2026-08-30T08:00:43+00:00 always 0.64 https://support.aperainst.com/support/solutions/folders/14000124280 2026-08-30T08:00:43+00:00 always 0.64 https://support.aperainst.com/support/solutions/folders/14000124281 2026-08-30T08:00:43+00:00 always 0.64 https://support.aperainst.com/support/solutions/folders/14000124282 2026-08-30T08:00:43+00:00 always 0.64 https://support.aperainst.com/support/solutions/folders/14000127868 2026-08-30T08:00:43+00:00 always 0.64 https://support.aperainst.com/support/solutions/folders/14000132447 2026-08-30T08:00:43+00:00 always 0.64 https://support.aperainst.com/support/solutions/articles/14000035455-how-to-install-batteries-for-20-60-series-pocket-testers 2016-06-29T21:20:58+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000035456-how-to-take-measurements-using-ph60f-surface-ph-tester 2016-06-29T21:23:30+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000035457-how-to-replace-probes-for-60-series-premium-testers 2016-06-29T21:25:43+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000035462-how-to-set-up-and-use-reading-alarm-function-for-ph60-series-testers 2023-10-10T17:10:30+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000035466-how-to-setup-auto-hold-function-for-60-series-premium-testers 2016-06-29T21:48:10+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000035957-how-to-calibrate-apera-20-series-value-testers-1-3-points- 2016-07-21T00:36:58+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000035958-ph60-tester-quick-start-tutorial 2023-10-10T17:11:56+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000035959-how-to-test-sushi-rice-s-ph-value 2016-07-03T01:21:46+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000035960-how-to-test-liquid-s-ph-level- 2016-07-03T01:24:40+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000039067-how-to-replace-the-probes-of-sx610-ph-pen-tester 2017-07-15T01:43:53+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000044927-mp511-operation-tutorial 2016-09-12T21:05:39+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000050222-safety-data-sheet-for-apera-instruments-ph-7-00-calibration-buffer-solution 2025-09-03T04:54:35+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000050223-safety-data-sheet-for-apera-instruments-1413-mus-cm-conductivity-calibration-solutions 2025-09-03T04:50:51+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000050224-safety-data-sheet-for-3m-kcl-ph-orp-probe-storage-solution 2025-08-30T05:27:47+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000050225-safety-data-sheet-for-do-electrode-reference-solution 2021-11-03T23:40:55+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000051826-is-the-ph-meter-pre-calibrated- 2022-08-30T17:36:19+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000051827-should-i-always-keep-my-ph-electrode-soaked-in-storage-solution- 2022-08-30T17:32:52+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000051828-if-the-bpb-sensor-is-not-to-be-soaked-in-kcl-then-why-is-there-a-fill-line-on-the-pc60-that-surpasse 2025-01-29T05:25:03+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000051830-what-are-the-white-salts-oozing-out-of-the-probe-and-does-it-mean-my-meter-is-damaged-or-used- 2022-08-30T17:37:05+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000053636-how-often-should-i-calibrate-my-ph-meter- 2022-08-30T17:35:02+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000055941-how-to-deal-with-er1-and-er2-when-doing-calibrations 2022-08-30T17:36:00+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000063571-full-tutorial-for-pc60-premium-multi-parameter-pocket-tester 2017-05-20T01:06:05+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000065930-ec-tds-in-hydroponics 2022-08-30T17:38:27+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000069540-safety-data-sheet-for-protelyte-storage-solution 2025-09-03T03:43:06+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000069541-safety-data-sheet-for-222mv-orp-standard-solution 2025-08-30T05:28:15+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000088260-the-easiest-way-to-determine-if-your-ph-meter-is-accurate- 2025-11-21T06:38:49+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000088740-how-to-choose-the-right-ph-electrode-for-your-application- 2025-01-29T05:22:23+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000088741-how-to-properly-use-standard-calibration-solutions- 2022-08-30T17:33:33+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000094858-how-to-connect-to-zentest-and-perform-a-sample-test 2018-12-14T14:24:13+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000094859-how-to-perform-ph-calibration-with-zentest-app 2018-12-14T14:26:41+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000094860-how-to-perform-conductivity-calibration-with-zentest-app 2018-12-14T14:28:55+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000094861-how-to-use-the-data-management-tool-of-zentest-app 2018-12-14T14:30:00+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000098863-why-there-is-liquid-in-my-new-ph-tester-cap-is-it-used- 2022-08-30T17:31:02+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000106380-what-is-ph- 2019-11-05T16:40:38+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000106381-why-is-ph-important- 2019-11-05T16:42:04+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000106382-why-choose-a-ph-meter-instead-of-a-ph-test-strip 2019-11-05T16:43:34+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000106383-what-is-conductivity-resistivity-tds-salinity-and-their-relationship- 2019-11-05T16:45:25+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000106384-applications-of-conductivity-measurement 2019-11-05T16:50:04+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000106385-testing-conductivity 2019-11-05T16:51:31+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000106386-what-is-dissolved-oxygen-do- 2019-11-05T16:53:16+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000106387-how-to-test-dissolved-oxygen-do- 2019-11-05T16:54:30+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000106388-what-is-orp-oxidation-reduction-potential- 2019-11-05T16:56:01+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000106389-how-to-test-orp-oxidation-reduction-potential- 2019-11-05T16:57:04+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000107810-the-easiest-way-to-calculate-the-slope-of-a-ph-electrode 2022-08-30T17:39:18+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000113882-ec-mus-ms-how-to-convert- 2022-08-30T17:29:06+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000113883-why-is-my-tds-measurement-showing-ppt-instead-of-ppm- 2022-08-30T17:29:53+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000118620-my-tester-s-screen-is-showing-usa-p1-what-is-this- 2022-08-30T17:41:00+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000123827-when-i-try-to-connect-to-zentest-my-phone-asks-for-my-pin-what-do-i-do-with-it- 2022-08-30T17:42:14+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000132289-zentest-smart-testers-brochure 2021-10-28T11:42:40+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000132294-apera-instruments-general-product-catalog 2025-11-14T11:11:02+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000132316-turbidity-meters-brochure 2021-09-17T11:04:10+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000132399-safety-data-sheet-for-water-hardness-calibration-solutions 2021-09-23T17:58:38+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000132400-safety-data-sheet-for-fluoride-calibration-solutions 2021-09-23T17:59:19+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000132401-safety-data-sheet-for-2-77-ec-ms-cm-conductivity-calibration-solution 2025-09-03T04:54:00+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000133122-grostar-premium-pen-testers-for-growers 2021-10-28T11:41:49+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000135710-how-test-soil-slurry-s-ph- 2022-08-30T17:27:10+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000137662-how-to-measure-the-ph-of-pure-water-with-a-regular-ph-tester- 2022-08-30T17:29:28+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000138319-safety-data-sheet-for-50ms-cm-conductivity-solution 2025-09-03T04:54:53+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000138321-how-to-measure-ph-of-hf-containing-solutions- 2022-08-30T17:43:22+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000140801-safety-data-sheet-for-apera-turbidity-calibration-solutions 2025-10-31T04:47:27+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000141042-ph20-pocket-ph-tester-quick-start-guide 2023-02-23T10:35:39+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000145896-safety-data-sheet-for-electrode-cleaning-solution 2026-01-05T16:53:32+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000146928-labsen-tester-brochure 2025-11-14T11:09:58+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000146929-smart-labsen-tester-brochure 2025-11-14T11:09:46+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000149195-labsen-ph-electrode-handbook 2025-11-14T11:09:35+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000151082-ec20-conductivity-tester-tutorial-video 2024-06-05T18:02:25+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000151083-tds20-tds-tester-video-tutorial 2024-06-05T18:03:29+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000155928-how-to-understand-the-conductivity-accuracy-1-f-s- 2025-02-06T03:56:37+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000155929-how-to-understand-the-ph-accuracy-0-01-ph-1-digit- 2025-02-06T04:10:24+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000159153-why-orp-redox-matters-in-hydroponics- 2025-07-23T17:04:39+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000159806-safety-data-sheet-for-apera-instruments-ph-4-00-calibration-buffer-solution 2025-09-03T04:26:35+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000159807-safety-data-sheet-for-apera-instruments-ph-10-01-calibration-buffer-solution 2025-09-03T04:29:34+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000159808-safety-data-sheet-for-apera-instruments-ph-1-68-calibration-buffer-solution 2025-09-03T04:30:17+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000159809-safety-data-sheet-for-apera-instruments-ph-12-45-calibration-buffer-solution 2025-09-03T04:30:55+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000159810-safety-data-sheet-for-apera-instruments-84-mus-cm-conductivity-calibration-solutions 2025-09-03T04:51:37+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000159811-safety-data-sheet-for-apera-instruments-12-88-ms-cm-conductivity-calibration-solutions 2025-09-03T04:52:06+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000159812-safety-data-sheet-for-apera-instruments-111-8-ms-cm-conductivity-calibration-solutions 2025-09-03T04:52:51+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000160635-safety-data-sheet-for-1m-licl-electrode-refilling-solution 2025-12-19T16:26:14+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000161368-indsen-inline-ph-orp-ion-selective-electrodes-handbook 2025-11-14T11:11:59+07:00 always 0.512 https://support.aperainst.com/support/solutions/articles/14000162949-confused-by-ammonia-ammonium-and-nitrogen-stop-making-these-common-water-testing-mistakes- 2026-02-13T19:19:54+07:00 always 0.512