{"id":3477,"date":"2025-09-17T10:18:15","date_gmt":"2025-09-17T08:18:15","guid":{"rendered":"https:\/\/union-sensors.com\/sensors\/ph-deep-sea\/"},"modified":"2026-07-02T10:05:32","modified_gmt":"2026-07-02T08:05:32","slug":"ph-deep-sea","status":"publish","type":"page","link":"https:\/\/union-sensors.com\/en\/sensors\/ph-deep-sea\/","title":{"rendered":"pH Deep Sea"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"3477\" class=\"elementor elementor-3477 elementor-707\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6db9830 e-flex e-con-boxed e-con e-parent\" data-id=\"6db9830\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-5a66acb e-con-full e-flex e-con e-child\" data-id=\"5a66acb\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-1d0dfc3 e-con-full e-flex e-con e-child\" data-id=\"1d0dfc3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-54661f4 e-con-full e-flex e-con e-child\" data-id=\"54661f4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-1819e85 e-con-full e-flex e-con e-child\" data-id=\"1819e85\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b31a01e elementor-widget elementor-widget-heading\" data-id=\"b31a01e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Sensors<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d03d5c0 elementor-widget elementor-widget-heading\" data-id=\"d03d5c0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">pH Deep Sea<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b7df685 elementor-widget elementor-widget-text-editor\" data-id=\"b7df685\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><b>The Problem<\/b>:<br\/>Measuring the pH value in seawater using glass electrodes requires a specialized sensor design to avoid errors caused by the high ionic strength of seawater. When using conventional reference electrodes with ceramic diaphragms, issues can also arise due to the high and variable junction potentials that occur under pressure. For this reason, pH electrodes have previously only been offered for depths of up to 1,500 m.  <\/p>\n<p class=\"p1\">In addition, using two channels of the probe system for pH measurement\u2014one for the glass electrode and one for the reference electrode\u2014proved to be somewhat cumbersome.<\/p>\n<p><b>The solution: Versatile combination electrode for underwater probe systems \u2013 also flexible for standalone operation<br\/><\/b><span style=\"font-style: inherit; font-weight: inherit;\">The pH combination sensor consists of a reference electrode and a pH-sensitive glass electrode in one housing to save a free channel of the <\/span><span style=\"font-style: inherit; font-weight: inherit;\">probe system. To enable accurate measurements even in the deep sea, a double membrane was used for the reference electrode to avoid problems with signal stability during pressure changes.<\/span><\/p>\n<p><b>The Interface <br\/><\/b>The pH combination sensor for in-situ pH determination is available as a deep-sea version (up to 600 bar) without an integrated temperature sensor.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ab52088 elementor-icon-list--layout-traditional elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"ab52088\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/union-sensors.com\/wp-content\/uploads\/2026\/03\/US_Datenblatt_pHDeepSea_Lay02.pdf\" target=\"_blank\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"19.403\" height=\"20.272\" viewBox=\"0 0 19.403 20.272\"><path id=\"double_arrow_24dp_E3E3E3_FILL0_wght400_GRAD0_opsz24\" d=\"M242-739.728l7.24-10.136L242-760h3.548l7.24,10.136-7.24,10.136Zm8.615,0,7.24-10.136L250.615-760h3.548l7.24,10.136-7.24,10.136Z\" transform=\"translate(-242 760)\" fill=\"#ef7f01\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Datasheet<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-8d297f8 e-con-full e-flex e-con e-child\" data-id=\"8d297f8\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ffd5a0f e-grid e-con-boxed e-con e-parent\" data-id=\"ffd5a0f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-d7b1718 e-con-full e-flex e-con e-child\" data-id=\"d7b1718\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5025598 elementor-widget elementor-widget-heading\" data-id=\"5025598\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Technical data<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-44fc2e7 elementor-widget elementor-widget-shortcode\" data-id=\"44fc2e7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\">\n<table id=\"tablepress-7\" class=\"tablepress tablepress-id-7 tablepress-specs\">\n<thead>\n<tr class=\"row-1\">\n\t<th class=\"column-1\">Parameter<\/th><th class=\"column-2\">Wert<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr class=\"row-2\">\n\t<td class=\"column-1\">Messbereich<\/td><td class=\"column-2\">Variabel zwischen 0 \u2026 14 pH, Standard: 2 \u2026 11 pH<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\">Genauigkeit \/ Aufl\u00f6sung<\/td><td class=\"column-2\">0,05 pH \/ 0,01 pH<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\">Druckbereich<\/td><td class=\"column-2\">Bis 6.000 dbar<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td class=\"column-1\">Stromversorgung<\/td><td class=\"column-2\">9.5 \u2026 18 V DC (andere auf Anfrage)<\/td>\n<\/tr>\n<tr class=\"row-6\">\n\t<td class=\"column-1\">Signalausgang<\/td><td class=\"column-2\">0 \u2026 +5 V DC (andere auf Anfrage)<\/td>\n<\/tr>\n<tr class=\"row-7\">\n\t<td class=\"column-1\">Abmessungen<\/td><td class=\"column-2\">\u00b7 Durchmesser: ca. 30,0 mm  <br \/>\n\u00b7 L\u00e4nge: 250 mm gesamt<\/td>\n<\/tr>\n<tr class=\"row-8\">\n\t<td class=\"column-1\">Stecker<\/td><td class=\"column-2\">Subconn BH4M Titan Version (andere auf Anfrage)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-7 from cache --><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bf1908d elementor-widget elementor-widget-text-editor\" data-id=\"bf1908d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><b>Application areas<\/b><\/p><ul><li data-start=\"3964\" data-end=\"3994\"><p data-start=\"3966\" data-end=\"3994\">Marine and climate research<\/p><\/li><li data-start=\"3995\" data-end=\"4017\"><p data-start=\"3997\" data-end=\"4017\">Offshore industry<\/p><\/li><li data-start=\"4018\" data-end=\"4050\"><p data-start=\"4020\" data-end=\"4050\">Environmental &#038; water monitoring<\/p><\/li><li data-start=\"4051\" data-end=\"4072\"><p data-start=\"4053\" data-end=\"4072\">Energy industry<\/p><\/li><li data-start=\"4073\" data-end=\"4098\"><p data-start=\"4075\" data-end=\"4098\">Maritime technologies<\/p><\/li><li data-start=\"4099\" data-end=\"4138\"><p data-start=\"4101\" data-end=\"4138\">Universities &#038; research institutes<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c88b306 e-flex e-con-boxed e-con e-parent\" data-id=\"c88b306\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-1915614 e-grid e-con-full e-con e-child\" data-id=\"1915614\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-af2328b e-con-full e-flex e-con e-child\" data-id=\"af2328b\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-3c40c8f e-con-full e-flex e-con e-child\" data-id=\"3c40c8f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c9043e9 elementor-widget elementor-widget-heading\" data-id=\"c9043e9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Service<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-03d14ce elementor-widget elementor-widget-text-editor\" data-id=\"03d14ce\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>We will answer your questions in the administrative and commercial area.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3f0ef1e elementor-widget elementor-widget-text-editor\" data-id=\"3f0ef1e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>+49 721 680381-30<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ae62571 elementor-icon-list--layout-traditional elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"ae62571\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"mailto:service@union-sensors.com\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"19.403\" height=\"20.271\" viewBox=\"0 0 19.403 20.271\"><path id=\"double_arrow_24dp_E3E3E3_FILL0_wght400_GRAD0_opsz24\" d=\"M242-739.728l7.24-10.136L242-760h3.548l7.24,10.136-7.24,10.136Zm8.615,0,7.24-10.136L250.615-760h3.548l7.24,10.136-7.24,10.136Z\" transform=\"translate(-242 760)\" fill=\"#fff\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">support@union-sensors.com<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-dc5632a e-con-full e-flex e-con e-child\" data-id=\"dc5632a\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-2018e5e e-con-full e-flex e-con e-child\" data-id=\"2018e5e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-036a7a8 elementor-widget elementor-widget-heading\" data-id=\"036a7a8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Support<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-eec2421 elementor-widget elementor-widget-text-editor\" data-id=\"eec2421\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>For technical support for your product, you can open a support ticket.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c225404 elementor-icon-list--layout-traditional elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"c225404\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"mailto:support@union-sensors.com\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"19.403\" height=\"20.271\" viewBox=\"0 0 19.403 20.271\"><path id=\"double_arrow_24dp_E3E3E3_FILL0_wght400_GRAD0_opsz24\" d=\"M242-739.728l7.24-10.136L242-760h3.548l7.24,10.136-7.24,10.136Zm8.615,0,7.24-10.136L250.615-760h3.548l7.24,10.136-7.24,10.136Z\" transform=\"translate(-242 760)\" fill=\"#fff\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">support@union-sensors.com<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-469d210 e-con-full e-flex e-con e-child\" data-id=\"469d210\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-959d809 e-con-full e-flex e-con e-child\" data-id=\"959d809\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9926b44 elementor-widget elementor-widget-heading\" data-id=\"9926b44\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Sales<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ec7d6b8 elementor-widget elementor-widget-text-editor\" data-id=\"ec7d6b8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The sales department is your central contact for product inquiries and quotation preparation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f57e484 elementor-widget elementor-widget-text-editor\" data-id=\"f57e484\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>+49 721 680381-20<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e13d9bc elementor-icon-list--layout-traditional elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"e13d9bc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"mailto:sales@union-sensors.com\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"19.403\" height=\"20.272\" viewBox=\"0 0 19.403 20.272\"><path id=\"double_arrow_24dp_E3E3E3_FILL0_wght400_GRAD0_opsz24\" d=\"M242-739.728l7.24-10.136L242-760h3.548l7.24,10.136-7.24,10.136Zm8.615,0,7.24-10.136L250.615-760h3.548l7.24,10.136-7.24,10.136Z\" transform=\"translate(-242 760)\" fill=\"#003056\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">sales@union-sensors.com<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-02ece9d e-con-full e-flex e-con e-child\" data-id=\"02ece9d\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-e424887 e-con-full e-flex e-con e-child\" data-id=\"e424887\" data-element_type=\"container\" 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When using conventional reference electrodes with ceramic diaphragms, issues can also arise due to the high and variable junction potentials that occur under pressure. 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