{"id":44641,"date":"2024-04-02T22:36:15","date_gmt":"2024-04-02T12:06:15","guid":{"rendered":"https:\/\/onetemp.c2szky.ap-southeast-2.wpstaqhosting.com\/product\/phionics-sts-do-dissolved-oxygen-sensor-with-4-20ma\/"},"modified":"2026-11-06T17:16:03","modified_gmt":"2026-11-06T06:46:03","slug":"phionics-sts-do-dissolved-oxygen-sensor-with-4-20ma","status":"publish","type":"product","link":"https:\/\/www.onetemp.com.au\/nz\/product\/phionics-sts-do-dissolved-oxygen-sensor-with-4-20ma\/","title":{"rendered":"pHionics STs &#8211; DO (Dissolved Oxygen) Sensor with 4-20mA"},"content":{"rendered":"<p data-lfile-container=\"de48005e-7248-4438-b3cb-531a6c345a13\" data-pm-slice=\"1 1 []\">The pHionics STs Series\u2122 Dissolved Oxygen sensor measures dissolved oxygen (0-20 mg\/L or percent saturation) and temperature (0-50\u00b0C) in a single narrow probe. Two noise-resistant 4-20 mA outputs connect to most dataloggers, PLCs and RTUs.<\/p>\n<p>The latest STs Series uses a user-serviceable galvanic electrode. You no longer replace the whole electrode when it wears or gets damaged. Instead, you change the membrane and electrolyte solution yourself on the bench using the Membrane Replacement Kit included with the sensor. Servicing is more regular (typically every 1-2 months, depending on the site), but it needs no special tools and costs far less than a new electrode. A damaged membrane becomes a quick swap rather than a replacement order and downtime.<\/p>\n<p>The large-surface-area anode keeps oxygen exchange across the membrane consistent and reduces fouling. The chemical-resistant PVDF and 316 stainless steel housing is built for long-term, unattended deployment in wastewater, aquaculture and environmental monitoring.<\/p>\n<h3>STs Series Dissolved Oxygen Sensor Features List<\/h3>\n<ul style=\"list-style-type: disc;\">\n<li>Galvanic electrode with a large surface area anode to increase stability and prevent clogging<\/li>\n<li>User-replaceable membrane and electrolyte for low-cost field servicing<\/li>\n<li>Secondary 0-50\u00b0C temperature sensor<\/li>\n<li>Chemical-resistant PVDF and 316 Stainless Steel housing (Titanium optional) for long-term monitoring<\/li>\n<li>Narrow diameter (1.9 cm or 0.75 inches)<\/li>\n<li>Removable electrode guard to reduce debris buildup and protect from damage<\/li>\n<li>Fully submersible up to 483 kPa (70 psi)<\/li>\n<li>Shielded, Kevlar\u00ae-reinforced, water-blocked polyurethane cable<\/li>\n<li>4-20 mA signal capable of transmission up to 4.8 km (3 miles) with proper wire gauge<\/li>\n<li>Patented pHiConn\u2122 connections to easily replace any part without special tools<\/li>\n<li>Automatic Temperature Compensation (2% per degree Celsius)<\/li>\n<li>Reversible Input Protection and Operation<\/li>\n<li>Low power usage for long-term water quality monitoring<\/li>\n<li>Isolated to prevent ground loops<\/li>\n<li>Signal conditioning to remove background noise<\/li>\n<\/ul>\n<h3>Accurate Measurements<\/h3>\n<h3>Application List<\/h3>\n<ul style=\"list-style-type: disc;\">\n<li>Industrial Effluent Monitoring<\/li>\n<li>Wastewater Treatment<\/li>\n<li>Environmental Monitoring<\/li>\n<li>Aquaculture<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>The pHionics STs Series\u2122 Dissolved Oxygen sensor measures dissolved oxygen (0-20 mg\/L or percent saturation) and temperature (0-50\u00b0C), with dual 4-20 mA outputs and a user-replaceable membrane for simple, low-cost field servicing.<\/p>\n<p data-pm-slice=\"1 1 []\"><strong>Available in 7.62m standard cable length (25\u2032) \u2013 custom cable lengths available on request.\u00a0<\/strong><\/p>","protected":false},"featured_media":32399,"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":[364,516,363],"connectivity-output":[66],"environment":[88],"instrument-type":[213,228,229],"manufacturer":[242],"measurement-input":[108],"class_list":["post-44641","product","type-product","status-publish","has-post-thumbnail","product_cat-products","application-water-analysis","application-controllers-transmitters","application-water-quality","connectivity-output-4-20ma","environment-underwater-monitoring","instrument-type-sensors","instrument-type-transmitters","instrument-type-2-wire-loop-powered","manufacturer-phionics","measurement-input-dissolved-oxygen-do","first","instock","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":["45017","45212"],"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":[],"bundle_sells_title":"","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>pHionics STs Dissolved Oxygen Sensor, 4-20mA | OneTemp<\/title>\n<meta name=\"description\" content=\"Dissolved oxygen and temperature sensor with dual 4-20 mA outputs and a user-replaceable membrane. Built for wastewater, aquaculture and field monitoring.\" \/>\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\/phionics-sts-do-dissolved-oxygen-sensor-with-4-20ma\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"pHionics STs Dissolved Oxygen Sensor, 4-20mA | OneTemp\" \/>\n<meta property=\"og:description\" content=\"Dissolved oxygen and temperature sensor with dual 4-20 mA outputs and a user-replaceable membrane. 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