[{"sku":"U26-001","title":"HOBO Dissolved Oxygen Data Logger","subtitle":null,"variant_product_name":null,"unit_price":"1499.00","brands":["HOBO"],"region":null,"service_plans":[],"parcel_length":"2.00","parcel_width":"2.00","parcel_height":"15.00","parcel_weight":"0.60","sellable":true,"published":true,"product_page_url":"\/products\/data-loggers\/u26-001","nid":"12756","product_description":"<p>An affordable, precise data logger that measures oxygen concentrations in lakes, streams, rivers, estuaries, and coastal waters. Recommended for aquatic biology and hydrology research projects, this easy-to-maintain logger uses RDO\u00ae Basic (Rugged Dissolved Oxygen) optical DO sensor technology.<\/p>\r\n\r\n<p style=\"line-height: 20.7999992370605px;\">The HOBO U26 Dissolved Oxygen logger was part of a multi-year evaluation of DO loggers and sensors by the Alliance for Coastal Technologies (ACT), the results of which are published <a href=\"http:\/\/www.act-us.info\/Download\/Evaluations\/DOII2\/HOBO\/#56\" target=\"_blank\">here<\/a>. This un-biased report describes how the HOBO U26 performs in lab and field conditions. Note that our response letter, with added recommendations, is attached at the end of the report (pages 58-59).<\/p>\r\n","applications":["Environmental Research & Protection","Environmental Compliance","Renewable Energy","Water Resource Management","Aquatic Ecology","Water Quality & Compliance","Hydrology & Groundwater Monitoring","Watershed Management","Wetland & Stormwater","Dam Management"],"brand":"HOBO","communication":"Optic\/USB","compatible_items":{"Accessory":{"Antifouling_Protective_Guard":{"items":["U26-GUARD-2"]},"Data_Offload_Base_Stations_Shuttles_Couplers":{"items":["U-DTW-1"]},"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"]}},"Maintenance":{"Calibration_Solution":{"items":["U26-CAL-SOL"]},"Coupler":{"items":["COUPLER2-C"]},"Replacement_Parts":{"items":["U26-RDOB-1"]}},"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"]}}},"compliance_marks":["Conformit\u00e9 Europ\u00e9ene (CE)"],"country":"US","customers_also_bought":["U-DTW-1","U24-002-C","U26-GUARD-2","U26-RDOB-1"],"field_documents":[{"nid":9736},{"nid":9446}],"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":["Dissolved Oxygen ","Water Temperature "],"media_remote_videos":["https:\/\/www.youtube.com\/watch?v=XeuflbHBiSM"],"not_a_sku":"0","parcel_status":"default","primary_measurement":"Dissolved Oxygen","product_battery":"factory_replacement","features":"<ul>\n\t<li>Affordable, high performance dissolved oxygen (DO) monitoring with 0.2 mg\/L accuracy<\/li>\n\t<li>Optical DO sensor technology for long-lasting calibration with less maintenance<\/li>\n\t<li>HOBOware Pro's Dissolved Oxygen Assistant software corrects for measurement drift from fouling; provides salinity-adjusted DO concentrations and percent saturation<\/li>\n\t<li>Optical USB interface for high-speed, reliable data offload<\/li>\n\t<li>User-replaceable DO sensor cap eliminates need to send logger back to the factory to replace membrane<\/li>\n<\/ul>\n\n<p><strong>\u200b<\/strong>N<strong>OTE:<\/strong> For DO measurements in saltwater, an adjustment for salinity is required. For waters with small changes in salinity (&lt;2 ppt), a salinity meter reading typically provides enough accuracy. For environments with greater salinity changes, we generally recommend the <a href=\"\/products\/data-loggers\/u24-002-C\" rel=\"noopener\" target=\"_blank\">HOBO U24-002-C Conductivity logger<\/a>. If you need DO in Percent Saturation, barometric pressure data is required, which can be logged with a&nbsp;<a href=\"\/products\/data-loggers\/u20-001-04\" rel=\"noopener\" target=\"_blank\">HOBO U20-001-04 Water Level logger<\/a>.<\/p>\n","product_price":"1499.00","specifications":[{"type":"Product Specifications","revision_default":"1","field_hide_in_compare":"0","field_hide_on_specs_tab":"0","field_specification_group_label":"Dissolved Oxygen","field_specification_items":[{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Sensor Type","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"Optical"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Measurement Range","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"0 to 30 mg\/L"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Calibrated Range","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"0 to 20 mg\/L; 0 to 35\u00b0C (32 to 95\u00b0F)"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Accuracy","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"\u00b1 0.2 mg\/L up to 8 mg\/L; \u00b1 0.5 mg\/L from 8 to 20 mg\/L"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Resolution","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"0.02 mg\/L"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Response Time","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"To 90% in less than 2 minutes"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"DO Sensor Cap Life","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"6 months, cap expires 7 months after initialization"}]}]},{"type":"Product Specifications","revision_default":"1","field_hide_in_compare":"0","field_hide_on_specs_tab":"0","field_specification_group_label":"Temperature","field_specification_items":[{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Temperature Measurement\/Operating Range","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"-5 to 40\u00b0C (23 to 104\u00b0F); non-Freezing"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Temperature Accuracy","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"0.2\u00b0C (0.36\u00b0F)"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Temperature Resolution","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"0.02\u00b0C (0.04\u00b0F)"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Response Time","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"To 90% in less than 30 minutes"}]}]},{"type":"Product Specifications","revision_default":"1","field_hide_in_compare":"0","field_hide_on_specs_tab":"0","field_specification_group_label":"Logger","field_specification_items":[{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Memory","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"21,700 sets of DO and temperature measurements (64 KB total memory)"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Logging Rate","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"1 minute to 18 hours"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Time Accuracy","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"\u00b11 minute per month at 0 to 50\u00b0C (32 to 122\u00b0F)"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Battery","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"3.6 V lithium battery; factory replaceable"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Battery Life","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"3 years (at 5 minute logging)"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Download Type","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"Optical"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Depth Rating","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"100 m (328 ft)"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Buoyancy","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"Salt water: 13 g (0.46 oz) negative | Fresh water: 20 g (0.71 oz) negative"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Wetted Materials","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"Black Delrin\u00ae, PVC, EPDM o-rings, silicone bronze screws; rated for saltwater use"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Size","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"39.6 mm diameter x 266.7 mm length (1.56 x 10.5 inches)"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Weight","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"272.4 g (9.61 oz)"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Environmental Rating","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"IP68"}]}]}],"product_status":"active","product_type":"Data Loggers","related_resources":["ACT Evaluation Report on the HOBO U26 DO Logger"],"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 U26-001 Dissolved Oxygen Data Logger","Dissolved oxygen sensor cap","Protective guard","Calibration boot and sponge"],"digital_item":"0"},[{"nid":"9736","uuid":"acaf8f7c-5eeb-467e-8452-eb08db3399e5","vid":"10581","langcode":"und","revision_timestamp":"1645725760","status":"1","title":"HOBO Dissolved Oxygen Logger (U26-001) User's Manual","created":"1334750803","changed":"1645725760","promote":"0","sticky":"0","default_langcode":"1","revision_default":"1","revision_translation_affected":"1","path":{"alias":"\/resources\/documentation\/15603-e-man-u26x","pid":"19121","langcode":"und"},"archive_resource":"0","associated_products":["U26-001"],"brand":"HOBO","documentation_files":{"English":"https:\/\/dev-d9.onsetcomp.com\/sites\/default\/files\/resources-documents\/15603-K%20MAN-U26x.pdf","German":"https:\/\/dev-d9.onsetcomp.com\/sites\/default\/files\/resources-documents\/18509-G%20U26x%20Manual%20German.pdf"},"documentation_id":"15603-E-MAN-U26x","documentation_is_datasheet":"0","resource_type":"Documentation"},{"nid":"9446","uuid":"af93e584-b5d1-456b-aa6d-956a4f5d8d1b","vid":"10291","langcode":"und","revision_timestamp":"1645725760","status":"1","title":"HOBOware Pro Dissolved Oxygen Assistant - User\u2019s Guide","created":"1336509798","changed":"1645725760","promote":"0","sticky":"0","default_langcode":"1","revision_default":"1","revision_translation_affected":"1","path":{"alias":"\/resources\/documentation\/15604-dissolved-oxygen-assistant-ug","pid":"18296","langcode":"und"},"archive_resource":"0","associated_products":["BHW-PRO-DLD","U26-001"],"brand":"HOBO","documentation_files":{"English":"https:\/\/dev-d9.onsetcomp.com\/sites\/default\/files\/resources-documents\/15604-C%20Dissolved%20Oxygen%20Assistant%20User%27s%20Guide.pdf"},"documentation_id":"15604-Dissolved-Oxygen-Assistant-UG","files":{"documentation_image":"https:\/\/dev-d9.onsetcomp.com\/sites\/default\/files\/resources\/doo-da_0.jpg","media_image":"https:\/\/dev-d9.onsetcomp.com\/sites\/default\/files\/resources\/doo-da_0.jpg"},"documentation_is_datasheet":"0","resource_type":"Documentation"}]]