[{"sku":"U24-001","title":"HOBO Fresh Water Conductivity Data Logger","subtitle":"Fresh Water","variant_product_name":null,"unit_price":"1075.00","brands":["HOBO"],"region":null,"service_plans":[],"parcel_length":"5.00","parcel_width":"1.50","parcel_height":"5.50","parcel_weight":"0.50","sellable":true,"published":true,"product_page_url":"\/products\/data-loggers\/u24-001","nid":"12741","product_description":"<p>A high-accuracy, cost-effective data logger that measures and records conductivity and temperature in streams, lakes, and other freshwater sources. Recommended for monitoring aquifers for saltwater intrusion and road and agricultural runoff, this logger's open access to its sensor simplifies cleaning and maintenance, and its non-contact sensor minimizes measurement errors related to drift. Also features software-based drift compensation.<\/p>\r\n\r\n<div class=\"hovertip\" target=\"sensor-hovertip\">The titanium pentoxide coating on the non-contact sensor prevents it from coming into contact with the water, thereby preventing tarnishing or corrosion associated with traditional electrode sensors. This sensor coating is also inert, so fouling can be easily wiped off the sensor.<\/div>\r\n","applications":["Environmental Research & Protection","Climate","Environmental Compliance","Renewable Energy","Green Space","Ecology","Water Resource Management","Aquatic Ecology","Water Quality & Compliance","Hydrology & Groundwater Monitoring","Watershed Management","Wetland & Stormwater","Dam Management","Construction Compliance"],"brand":"HOBO","communication":"Optic\/USB","compatible_items":{"Accessory":{"Data_Offload_Base_Stations_Shuttles_Couplers":{"items":["COUPLER2-C","U-DTW-1"]},"Protective_Covers_and_Boots":{"items":["U22-U24-CAP"]},"Protective_Enclosures":{"items":["HOUSING-U2X"]},"Stainless_Steel_Cable_Crimps":{"items":["CABLE-1-300","CABLE-1-50","CABLE-1-CRIMP"]},"Well_Caps":{"items":["WELL-CAP-01"]},"Compliance_Certificates":{"items":["COMPLIANCE CERT"]},"Accessories":{"items":["ME-BP","COND-CAL-1","COND-CAL-2","COND-CAL-3","COND-CAL-4"]}},"Required Communications":{"Data_Offload_Base_Stations_Shuttles_Couplers":{"items":["BASE-U-4","U-DTW-1"]}},"Required Software":{"Graphing_Analysis":{"items":["BHW-PRO-DLD","BHW-PRO-USB"]}}},"country":"US","customers_also_bought":["MX2001","U-DTW-1","U20L-0x","U26-001"],"field_documents":[{"nid":9696},{"nid":10351}],"environment":["Water"],"important_information":"Requires HOBOware Pro software and either a U-DTW-1 Waterproof Shuttle or the Base-U-4 Optic USB Base Station for configuration and data offload. Please see compatible items below.","logger_sensor_type":"integrated_sensors","measurement":["Conductivity\/Salinity ","Water Temperature "],"media_remote_videos":["https:\/\/www.youtube.com\/watch?v=HsZ3uYWyQNM"],"not_a_sku":"0","parcel_status":"default","product_battery":"factory_replacement","product_family_series":"U24","features":"<ul>\n\t<li>Titanium pentoixed coated non-contact sensor rovides long life and less measurement drift<\/li>\n\t<li>Provides easy access to sensor for cleaning and shedding air bubbles<\/li>\n\t<li>HOBOware Pro software enables start\/end-point calibration to compensate for any fouling and provides easy conversion to specific conductance and salinity<\/li>\n\t<li>USB optical interface provides high-speed, reliable data offload in wet environments<\/li>\n\t<li>Compatible with the HOBO Waterproof Shuttle for easy and reliable data retrieval and transport<\/li>\n<\/ul>\n","product_price":"1075.00","specifications":[{"type":"Simple text","revision_default":"1","field_description":"<table border=\"0\" cellpadding=\"7\" cellspacing=\"0\" style=\"width:100%\">\n\t<tbody>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Measurements<\/strong><\/td>\n\t\t\t<td valign=\"top\">Actual Conductivity, Temperature, Specific Conductance at 25\u00b0C (calculated)<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Conductivity Calibrated Measurement Ranges<\/strong><\/td>\n\t\t\t<td valign=\"top\">Low Range: 0 to 1,000 \u00b5S\/cm<br>\n\t\t\tFull Range: 0 to 10,000 \u00b5S\/cm<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Conductivity Calibrated Range - Temperature Range<\/strong><\/td>\n\t\t\t<td valign=\"top\">5\u00b0 to 35\u00b0C (41\u00b0 to 95\u00b0F)<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Conductivity Extended Ranges<\/strong><\/td>\n\t\t\t<td valign=\"top\">Low Range: 0 to 2,500 \u00b5S\/cm<br>\n\t\t\tFull Range: 0 to 15,000 \u00b5S\/cm<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Temperature Measurement Range<\/strong><\/td>\n\t\t\t<td valign=\"top\">-2\u00b0 to 36\u00b0C (28\u00b0 to 97\u00b0F)<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Specific Conductance Accuracy (in Calibrated Range)<\/strong><\/td>\n\t\t\t<td valign=\"top\">Low Range: 3% of reading, or 5 \u00b5S\/cm, and<br>\n\t\t\tFull Range: 3% of reading, or 20 \u00b5S\/cm, whichever is greater, using Conductivity Data Assistant and calibration measurements<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Conductivity Resolution<\/strong><\/td>\n\t\t\t<td valign=\"top\">1 \u00b5S\/cm<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Temperature Accuracy<\/strong><\/td>\n\t\t\t<td valign=\"top\">0.1\u00b0C (0.2\u00b0F) at 25\u00b0C (77\u00b0F)<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Temperature Resolution<\/strong><\/td>\n\t\t\t<td valign=\"top\">0.01\u00b0C (0.02\u00b0F)<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Conductivity Drift<\/strong><\/td>\n\t\t\t<td valign=\"top\">Less than 3% sensor drift per year, exclusive of drift from fouling<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Response Time<\/strong><\/td>\n\t\t\t<td valign=\"top\">1 second to 90% of change (in water)<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Operating Range<\/strong><\/td>\n\t\t\t<td valign=\"top\">-2\u00b0 to 36\u00b0C (28\u00b0 to 97\u00b0F) - non-freezing<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Memory<\/strong><\/td>\n\t\t\t<td valign=\"top\">18,500 temperature and conductivity measurements when using one conductivity range; 11,500 sets of measurements when using both conductivity ranges (64 KB total memory)<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Sample Rate<\/strong><\/td>\n\t\t\t<td valign=\"top\">1 second to 18 hrs, fixed or multiple-rate sampling with up to 8 user-defined sampling intervals<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Clock Accuracy<\/strong><\/td>\n\t\t\t<td valign=\"top\">\u00b11 minute per month<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Battery<\/strong><\/td>\n\t\t\t<td valign=\"top\">3.6 Volt lithium battery<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Battery Life<\/strong><\/td>\n\t\t\t<td valign=\"top\">3 years (at 1 minute logging)<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Maximum Depth<\/strong><\/td>\n\t\t\t<td valign=\"top\">70 m (225 ft)<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Weight<\/strong><\/td>\n\t\t\t<td valign=\"top\">193 g (6.82 oz), buoyancy in freshwater: -59.8 g (-2.11 oz)<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Size<\/strong><\/td>\n\t\t\t<td valign=\"top\">3.18 cm diameter x 16.5 cm, with 6.3 mm mounting hole (1.25 in. diameter x 6.5 in., 0.25 in. hole)<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Wetted Housing Materials<\/strong><\/td>\n\t\t\t<td valign=\"top\">Delrin\u00ae, epoxy, stainless steel retaining ring, polypropylene, Buna rubber O-ring, titanium pentoxide (inert coating over sensor)<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><strong>Environmental Rating<\/strong><\/td>\n\t\t\t<td valign=\"top\">IP68<\/td>\n\t\t<\/tr>\n\t\t<tr>\n\t\t\t<td valign=\"top\"><p><\/p><article class=\"media media--type-image media--view-mode-default media--orientation-unset\" data-embed-button=\"embed_image\" data-width=\"24\" data-height=\"19\">\n \n \n <div class=\"field field--name-field-media-image field--type-image field--label-visually_hidden\">\n <div class=\"field__label visually-hidden\">Image<\/div>\n <div class=\"field__item field__item__odd field__item__first field__item__last\"> <img loading=\"lazy\" src=\"\/sites\/default\/files\/embedded-product-images\/CE.jpg\" width=\"24\" height=\"19\" alt=\"Description: ce\" typeof=\"foaf:Image\" class=\"img-fluid\">\n\n<\/div>\n <\/div>\n\n <\/article>\n<\/td>\n\t\t\t<td valign=\"top\">The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).<\/td>\n\t\t<\/tr>\n\t<\/tbody>\n<\/table>"}],"product_status":"active","product_type":"Data Loggers","search_keys":"water temperature","solution":["Stand-alone Data Loggers ","Stand-alone Optical Data Loggers ","Waterproof Stand-alone Data Loggers "],"warranty":"1","warranty_premium":"1","whats_in_the_box":["HOBO U24-001 Conductivity Data Logger","Communications window protective cap"],"digital_item":"0"},[{"nid":"9696","uuid":"cf94d400-23ca-44f5-9414-6c33a6b5fd79","vid":"105156","langcode":"und","revision_timestamp":"1772665274","status":"1","title":"HOBO U24 Conductivity Logger (U24-001) User's Manual","created":"1268666035","changed":"1772665274","promote":"0","sticky":"0","default_langcode":"1","revision_default":"1","revision_translation_affected":"1","path":{"alias":"\/resources\/documentation\/15070-man-u24x","pid":"19001","langcode":"und"},"archive_resource":"0","associated_products":["U24-001"],"brand":"HOBO","documentation_files":{"English":"https:\/\/dev-d9.onsetcomp.com\/sites\/default\/files\/2026-03\/15070-K%20U24-001%20Manual.pdf","German":"https:\/\/dev-d9.onsetcomp.com\/sites\/default\/files\/resources-documents\/18492-E%20U24x%20Manual%20German.pdf"},"documentation_hoboconnect":"0","documentation_id":"15070-MAN-U24x","documentation_intemp_app":"0","documentation_is_datasheet":"0","hoboconnect_docs_sorting":"0","hobomobile_docs_sorting":"0","intemp_cx_docs_sorting":"0","resource_type":"Documentation"},{"nid":"10351","uuid":"31ae94b5-3d51-4f72-81b1-e12e1ef23b46","vid":"11196","langcode":"und","revision_timestamp":"1645725702","status":"1","title":"HOBO U24 Conductivity Logger (U24-001 and U24-002-C) Quick Start","created":"1516404564","changed":"1645725702","promote":"0","sticky":"0","default_langcode":"1","revision_default":"1","revision_translation_affected":"1","path":{"alias":"\/resources\/documentation\/22140-man-u24-qsg","pid":"20941","langcode":"und"},"archive_resource":"0","associated_products":["U24-001","U24-002-C"],"brand":"HOBO","documentation_files":{"English":"https:\/\/dev-d9.onsetcomp.com\/sites\/default\/files\/resources-documents\/22140-B%20MAN-U24-QSG-web.pdf"},"documentation_id":"22140-MAN-U24-QSG","documentation_is_datasheet":"0","documentation_short_title":"HOBO U24 Quick Start","resource_type":"Documentation"}]]