{"product_id":"horiba-checker-water-quality-meter-x-51-x-52","title":"Horiba Checker Water Quality Meter X-51 \u0026 X-52","description":"\u003cp\u003eHORIBA Checker units are reference instruments used to verify that a water quality meter is reading correctly. Rather than measuring a sample, a Checker supplies known, stable electrical signals to the meter's input so you can confirm the instrument's electronics and calibration are sound independently of any electrode, sensor or standard solution.\u003c\/p\u003e\n\n\u003cp\u003eThis matters because a bad reading has two possible causes: the sensor or the meter. Substituting a fresh electrode is the usual diagnostic, but that is slow and expensive. A Checker separates the two immediately — if the meter reads the Checker's known input correctly, the electronics are fine and the problem is the sensor or the solution. Laboratories operating under a quality system also use Checkers as documented evidence that instrument electronics were verified on schedule.\u003c\/p\u003e\n\n\u003ch3\u003eTwo models\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChecker X-51\u003c\/strong\u003e (part no. 3014028368) — verifies pH, mV, ion and dissolved oxygen measurement channels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChecker X-52\u003c\/strong\u003e (part no. 3014028370) — verifies conductivity measurement channels.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRoutine verification of benchtop and handheld meter electronics under a quality system\u003c\/li\u003e\n\u003cli\u003eIsolating whether a suspect reading is caused by the meter or the electrode\u003c\/li\u003e\n\u003cli\u003eInstrument qualification and periodic performance checks in ISO or accredited laboratories\u003c\/li\u003e\n\u003cli\u003eAcceptance testing of newly received or newly repaired meters\u003c\/li\u003e\n\u003cli\u003eService and calibration workshops maintaining a fleet of instruments\u003c\/li\u003e\n\u003cli\u003eTroubleshooting drifting or unstable readings before ordering replacement sensors\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDocumentation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.horiba.com\/ind\/water-quality\/download\/\"\u003eHORIBA water quality document library — brochures, manuals and quick guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated items\u003c\/h3\u003e\n\u003cp\u003eReplacement electrodes, calibration and buffer solutions, electrode stands and meter accessories are in the \u003ca href=\"https:\/\/envirotechonline.com\/collections\/horiba-parts-accessories\"\u003eHoriba Parts \u0026amp; Accessories\u003c\/a\u003e collection.\u003c\/p\u003e\n\n\u003cp\u003eBrowse all \u003ca href=\"https:\/\/envirotechonline.com\/collections\/horiba\"\u003eHORIBA instruments\u003c\/a\u003e.\u003c\/p\u003e","brand":"Horiba","offers":[{"title":"X-51 - pH \/ mV \/ Ion \/ Dissolved Oxygen - 3014028368","offer_id":48226335981758,"sku":"3014028368","price":1015.0,"currency_code":"USD","in_stock":true},{"title":"X-52 - Conductivity - 3014028370","offer_id":48226336014526,"sku":"3014028370","price":1015.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/9926\/6750\/files\/csm_X-51_23712c4e01.png?v=1785337146","url":"https:\/\/envirotechonline.com\/products\/horiba-checker-water-quality-meter-x-51-x-52","provider":"EnviroTech Services","version":"1.0","type":"link"}