{"id":44603,"date":"2024-03-14T04:19:02","date_gmt":"2024-03-13T17:49:02","guid":{"rendered":"https:\/\/onetemp.c2szky.ap-southeast-2.wpstaqhosting.com\/product\/hobo-mx2501-ph-and-temperature-bluetooth-data-logger\/"},"modified":"2026-11-05T11:27:42","modified_gmt":"2026-11-05T00:57:42","slug":"hobo-mx2501-ph-and-temperature-bluetooth-data-logger","status":"publish","type":"product","link":"https:\/\/www.onetemp.com.au\/nz\/product\/hobo-mx2501-ph-and-temperature-bluetooth-data-logger\/","title":{"rendered":"HOBO MX2501 &#8211; pH and Temperature Bluetooth Data Logger"},"content":{"rendered":"<h2>Easy data offload to mobile devices via Bluetooth!<\/h2>\n<p>The HOBO MX2501 pH and Temperature Data Logger is designed for long-term monitoring of pH in estuaries, lakes, streams, rivers, and oceans. Leveraging Bluetooth Low Energy\u00ae (BLE) technology, the MX2501 pH Logger communicates wirelessly with the free HOBOconnect app and your mobile device or Windows computer, making logger setup, calibration, and data offload quick and easy. A guided pH calibration process on the HOBOconnect app makes an otherwise complicated process easier to follow. This affordable and compact logger dramatically cuts the time and effort needed to collect field data, while also offering higher resolution data. (NOTE: pH electrodes should always be stored in storage solution when not deployed.)<\/p>\n<h3>Highlighted Features<\/h3>\n<ul>\n<li>Guided pH calibration following on-screen prompts in HOBOconnect app<\/li>\n<li>Rugged PVC housing for deployment in both freshwater and saltwater environments<\/li>\n<li>Quick and easy data offload via Bluetooth Low Energy (BLE) to iOS devices<\/li>\n<li>Water detection system for longer battery life and less maintenance<\/li>\n<li>Potentiometric pH electrode with plastic body, gel electrolyte, and double cloth junction<\/li>\n<li>User-replaceable battery, pH electrode, and anti-biofouling copper guard<\/li>\n<li>Accuracy of\u00a0\u00b10.10 pH units within \u00b110\u00b0C of temperature at calibration<\/li>\n<\/ul>\n<h3>Guided calibration on your mobile device<\/h3>\n<p>The HOBOconnect app&#8217;s built-in guided calibration feature makes an otherwise difficult task a breeze, seamlessly walking you through the pH calibration process.<\/p>\n<h3>In what environment does this data logger operate?<\/h3>\n<p>This data logger operates in an underwater environment.<\/p>\n<h3>What measurements does this data logger support?<\/h3>\n<p>The MX2501 data logger supports the following measurements: pH and Water Temperature<\/p>\n<h3>Important:<\/h3>\n<p>If you are purchasing the MX2501 for the first time you will also require the\u00a0<a href=\"\/nz\/product\/hobo-calibration-kit-mx2500\/\">Calibration Kit<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>The new low-cost HOBO\u00ae MX2501 pH and Temperature logger is designed for long-term monitoring of pH in estuaries, lakes, streams, rivers, and oceans.<\/p>","protected":false},"featured_media":32327,"template":"","meta":{"_acf_changed":false,"om_disable_all_campaigns":false,"inline_featured_image":false,"_exactmetrics_skip_tracking":false,"_monsterinsights_skip_tracking":false},"product_brand":[],"product_cat":[15],"product_tag":[],"application":[363],"connectivity-output":[79],"environment":[88],"instrument-type":[189],"manufacturer":[263],"measurement-input":[145],"class_list":["post-44603","product","type-product","status-publish","has-post-thumbnail","product_cat-products","application-water-quality","connectivity-output-bluetooth","environment-underwater-monitoring","instrument-type-data-loggers","manufacturer-hobo-data-loggers","measurement-input-ph","first","instock","featured","taxable","shipping-taxable","purchasable","product-type-simple"],"composite_virtual":false,"composite_aggregate_weight":false,"composite_layout":"","composite_add_to_cart_form_location":"","composite_editable_in_cart":false,"composite_sold_individually_context":"","composite_shop_price_calc":"","composite_components":[],"composite_scenarios":[],"bundled_by":[],"bundle_stock_status":"instock","bundle_stock_quantity":null,"bundle_virtual":false,"bundle_layout":"","bundle_add_to_cart_form_location":"","bundle_editable_in_cart":false,"bundle_sold_individually_context":"","bundle_item_grouping":"","bundle_min_size":"","bundle_max_size":"","bundle_price":[],"bundled_items":[],"bundle_sell_ids":[44352],"bundle_sells_title":"Add Calibration Kit","bundle_sells_discount":"","acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>HOBO MX2501 - pH and Temperature Bluetooth Data Logger - OneTemp<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.onetemp.com.au\/nz\/product\/hobo-mx2501-ph-and-temperature-bluetooth-data-logger\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"HOBO MX2501 - pH and Temperature Bluetooth Data Logger - OneTemp\" \/>\n<meta property=\"og:description\" content=\"The new low-cost HOBO\u00ae MX2501 pH and Temperature logger is designed for long-term monitoring of pH in estuaries, lakes, streams, rivers, and oceans.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.onetemp.com.au\/nz\/product\/hobo-mx2501-ph-and-temperature-bluetooth-data-logger\/\" \/>\n<meta property=\"og:site_name\" content=\"OneTemp\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/OneTempAust\/\" \/>\n<meta property=\"article:modified_time\" content=\"2026-11-05T00:57:42+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.onetemp.com.au\/wp-content\/uploads\/2026\/10\/MX2501-pH-and-Temperature-Data-Logger-5.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"675\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"7 minutes\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"HOBO MX2501 - pH and Temperature Bluetooth Data Logger - OneTemp","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.onetemp.com.au\/nz\/product\/hobo-mx2501-ph-and-temperature-bluetooth-data-logger\/","og_locale":"en_US","og_type":"article","og_title":"HOBO MX2501 - pH and Temperature Bluetooth Data Logger - OneTemp","og_description":"The new low-cost HOBO\u00ae MX2501 pH and Temperature logger is designed for long-term monitoring of pH in estuaries, lakes, streams, rivers, and oceans.","og_url":"https:\/\/www.onetemp.com.au\/nz\/product\/hobo-mx2501-ph-and-temperature-bluetooth-data-logger\/","og_site_name":"OneTemp","article_publisher":"https:\/\/www.facebook.com\/OneTempAust\/","article_modified_time":"2026-11-05T00:57:42+00:00","og_image":[{"width":1200,"height":675,"url":"https:\/\/www.onetemp.com.au\/wp-content\/uploads\/2026\/10\/MX2501-pH-and-Temperature-Data-Logger-5.png","type":"image\/png"}],"twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"7 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":["WebPage","ItemPage"],"@id":"https:\/\/www.onetemp.com.au\/product\/hobo-mx2501-ph-and-temperature-bluetooth-data-logger\/","url":"https:\/\/www.onetemp.com.au\/product\/hobo-mx2501-ph-and-temperature-bluetooth-data-logger\/","name":"HOBO MX2501 - pH and Temperature Bluetooth Data Logger - OneTemp","isPartOf":{"@id":"https:\/\/www.onetemp.com.au\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.onetemp.com.au\/product\/hobo-mx2501-ph-and-temperature-bluetooth-data-logger\/#primaryimage"},"image":{"@id":"https:\/\/www.onetemp.com.au\/product\/hobo-mx2501-ph-and-temperature-bluetooth-data-logger\/#primaryimage"},"thumbnailUrl":"https:\/\/www.onetemp.com.au\/wp-content\/uploads\/2026\/10\/MX2501-pH-and-Temperature-Data-Logger-5.png","datePublished":"2024-03-13T17:49:02+00:00","dateModified":"2026-11-05T00:57:42+00:00","breadcrumb":{"@id":"https:\/\/www.onetemp.com.au\/product\/hobo-mx2501-ph-and-temperature-bluetooth-data-logger\/#breadcrumb"},"inLanguage":"en-NZ","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.onetemp.com.au\/product\/hobo-mx2501-ph-and-temperature-bluetooth-data-logger\/"]}]},{"@type":"ImageObject","inLanguage":"en-NZ","@id":"https:\/\/www.onetemp.com.au\/product\/hobo-mx2501-ph-and-temperature-bluetooth-data-logger\/#primaryimage","url":"https:\/\/www.onetemp.com.au\/wp-content\/uploads\/2026\/10\/MX2501-pH-and-Temperature-Data-Logger-5.png","contentUrl":"https:\/\/www.onetemp.com.au\/wp-content\/uploads\/2026\/10\/MX2501-pH-and-Temperature-Data-Logger-5.png","width":1200,"height":675},{"@type":"BreadcrumbList","@id":"https:\/\/www.onetemp.com.au\/product\/hobo-mx2501-ph-and-temperature-bluetooth-data-logger\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"","item":"https:\/\/www.onetemp.com.au\/nz"},{"@type":"ListItem","position":2,"name":"Shop","item":"https:\/\/www.onetemp.com.au\/shop\/"},{"@type":"ListItem","position":3,"name":"HOBO MX2501 &#8211; pH and Temperature Bluetooth Data Logger"}]},{"@type":"WebSite","@id":"https:\/\/www.onetemp.com.au\/#website","url":"https:\/\/www.onetemp.com.au\/","name":"OneTemp New Zealand","description":"","publisher":{"@id":"https:\/\/www.onetemp.com.au\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.onetemp.com.au\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-NZ"},{"@type":"Organization","@id":"https:\/\/www.onetemp.com.au\/#organization","name":"OneTemp New Zealand","url":"https:\/\/www.onetemp.com.au\/","logo":{"@type":"ImageObject","inLanguage":"en-NZ","@id":"https:\/\/www.onetemp.com.au\/#\/schema\/logo\/image\/","url":"https:\/\/www.onetemp.com.au\/wp-content\/uploads\/2025\/04\/OneTemp-Logo.jpeg","contentUrl":"https:\/\/www.onetemp.com.au\/wp-content\/uploads\/2025\/04\/OneTemp-Logo.jpeg","width":800,"height":153,"caption":"OneTemp"},"image":{"@id":"https:\/\/www.onetemp.com.au\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/OneTempAust\/","https:\/\/au.linkedin.com\/company\/onetemp-pty-ltd"]}]}},"_links":{"self":[{"href":"https:\/\/www.onetemp.com.au\/nz\/wp-json\/wp\/v2\/product\/44603","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.onetemp.com.au\/nz\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.onetemp.com.au\/nz\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.onetemp.com.au\/nz\/wp-json\/wp\/v2\/media\/32327"}],"wp:attachment":[{"href":"https:\/\/www.onetemp.com.au\/nz\/wp-json\/wp\/v2\/media?parent=44603"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.onetemp.com.au\/nz\/wp-json\/wp\/v2\/product_brand?post=44603"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.onetemp.com.au\/nz\/wp-json\/wp\/v2\/product_cat?post=44603"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.onetemp.com.au\/nz\/wp-json\/wp\/v2\/product_tag?post=44603"},{"taxonomy":"application","embeddable":true,"href":"https:\/\/www.onetemp.com.au\/nz\/wp-json\/wp\/v2\/application?post=44603"},{"taxonomy":"connectivity-output","embeddable":true,"href":"https:\/\/www.onetemp.com.au\/nz\/wp-json\/wp\/v2\/connectivity-output?post=44603"},{"taxonomy":"environment","embeddable":true,"href":"https:\/\/www.onetemp.com.au\/nz\/wp-json\/wp\/v2\/environment?post=44603"},{"taxonomy":"instrument-type","embeddable":true,"href":"https:\/\/www.onetemp.com.au\/nz\/wp-json\/wp\/v2\/instrument-type?post=44603"},{"taxonomy":"manufacturer","embeddable":true,"href":"https:\/\/www.onetemp.com.au\/nz\/wp-json\/wp\/v2\/manufacturer?post=44603"},{"taxonomy":"measurement-input","embeddable":true,"href":"https:\/\/www.onetemp.com.au\/nz\/wp-json\/wp\/v2\/measurement-input?post=44603"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}