{"id":44644,"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-orp-redox-sensor-with-4-20ma-output\/"},"modified":"2026-10-14T01:04:17","modified_gmt":"2026-10-13T14:34:17","slug":"phionics-sts-orp-redox-sensor-with-4-20ma-output","status":"publish","type":"product","link":"https:\/\/www.onetemp.com.au\/nz\/product\/phionics-sts-orp-redox-sensor-with-4-20ma-output\/","title":{"rendered":"pHionics STs &#8211; ORP (Redox) Sensor with 4-20mA output"},"content":{"rendered":"<p>The pHionics STs Series\u2122 ORP sensor provides reliable ORP (redox) and temperature measurements to a datalogger, RTU, PLC, or SCADA system for continuous water quality monitoring.<\/p>\n<p>Accurate and low-maintenance operation is ensured with noise-resistant 4-20 mA analog signals and a large-volume, double-junction electrode. Typical electrode life is 2-4 years and, when needed, a replacement is easily installed thanks to pHionics\u2019 patented pHiConn\u2122 Connector System. In addition, the electronics are isolated to prevent ground loops and proprietary signal conditioning virtually eliminates background noise.<\/p>\n<p>Durability is guaranteed with chemical-resistant 316 Stainless Steel (titanium optional) and high-quality double O-ring seals that last many years, even in harsh conditions. When combined with the compact design (0.75 in. or 19 mm diameter), this ORP sensor proves to be compatible with a wide range of applications.<\/p>\n<p>If you need a sensor that works anytime, anywhere, for many years, then the pHionics STs Series ORP sensor is here for you.<\/p>\n<h3>Highlighted Features<\/h3>\n<ul style=\"list-style-type: disc;\">\n<li>Replaceable electrode with platinum sensing element measuring -1000 to +1000 mV oxidation-reduction potential (ORP)<\/li>\n<li>Large reference half-cell to reduce calibration frequency<\/li>\n<li>Secondary 0-50\u00b0C temperature sensor<\/li>\n<li>2-wire, 4-20 mA analog outputs compatible with wide range of dataloggers or remote telemetry units (RTU)<\/li>\n<li>Narrow diameter (0.75 inches or 1.9 cm) for groundwater monitoring applications<\/li>\n<li>Low power usage<\/li>\n<\/ul>\n<h3>Low Maintenance<\/h3>\n<p>The weak point of ORP sensors is their reference solution, which gets diluted by the sample over time.\u202f STs Series ORP sensors mitigate this problem by incorporating a reference half cell with a large reservoir.\u202f The high volume, combined with a low-flow reference gel and junction, reduces the dilution rate to provide stable measurements with less calibration.<\/p>\n<h3>Full Features List<\/h3>\n<ul>\n<li>Combination double-junction electrode with large, gel-filled reference<\/li>\n<li>Secondary 0-50\u00b0C temperature sensor<\/li>\n<li>4-20 mA signal capable of transmission up to 3 miles (with proper wire gauge)<\/li>\n<li>Built-in electrical isolation to prevent ground loops<\/li>\n<li>Chemical-resistant PVDF\u202fand 316 Stainless Steel housing (Titanium optional)<\/li>\n<li>Narrow diameter (0.75 inches or 1.9 cm)<\/li>\n<li>Removable electrode guard to reduce debris or algae buildup and protect from damage<\/li>\n<li>Fully submersible up to 70 psi<\/li>\n<li>Shielded, Kevlar\u00ae-reinforced, water-blocked polyurethane cable<\/li>\n<li>Reversible Input Protection and Operation<\/li>\n<li>2-second warm-up time and low power usage to avoid battery drain of datalogger or RTU<\/li>\n<li>Signal conditioning to remove background noise<\/li>\n<\/ul>\n<h3>Accurate Measurements<\/h3>\n<h3>Applications<\/h3>\n<ul style=\"list-style-type: disc;\">\n<li>Groundwater Monitoring<\/li>\n<li>Agricultural Runoff<\/li>\n<li>Mining Pollution<\/li>\n<li>Industrial Effluent Monitoring<\/li>\n<li>Wastewater Treatment<\/li>\n<li>Environmental Remediation<\/li>\n<li>Aquaculture<\/li>\n<li>Chlorine Level Monitoring<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>The pHionics STs Series\u2122 ORP sensor provides reliable ORP (redox) and temperature measurements to a datalogger, RTU, PLC, or SCADA system for continuous water quality monitoring.<\/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":32420,"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":[516,364],"connectivity-output":[66],"environment":[88],"instrument-type":[213,228,229],"manufacturer":[242],"measurement-input":[141],"class_list":["post-44644","product","type-product","status-publish","has-post-thumbnail","product_cat-products","application-controllers-transmitters","application-water-analysis","connectivity-output-4-20ma","environment-underwater-monitoring","instrument-type-sensors","instrument-type-transmitters","instrument-type-2-wire-loop-powered","manufacturer-phionics","measurement-input-oxidation-reduction-potential-orp","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"composite_virtual":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 - ORP (Redox) Sensor with 4-20mA output - 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\/phionics-sts-orp-redox-sensor-with-4-20ma-output\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"pHionics STs - ORP (Redox) Sensor with 4-20mA output - OneTemp\" \/>\n<meta property=\"og:description\" content=\"The pHionics STs Series\u2122 ORP sensor provides reliable ORP (redox) and temperature measurements to a datalogger, RTU, PLC, or SCADA system for continuous water quality monitoring. Available in 7.62m standard cable length (25\u2032) \u2013 custom cable lengths available on request.\u00a0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.onetemp.com.au\/nz\/product\/phionics-sts-orp-redox-sensor-with-4-20ma-output\/\" \/>\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=\"2026-10-13T14:34:17+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.onetemp.com.au\/wp-content\/uploads\/2026\/10\/STs-ORP-Redox-Sensor-w_-4_20mA-Output-1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"900\" \/>\n\t<meta property=\"og:image:height\" content=\"500\" \/>\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=\"2 minutes\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"pHionics STs - ORP (Redox) Sensor with 4-20mA output - 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\/phionics-sts-orp-redox-sensor-with-4-20ma-output\/","og_locale":"en_US","og_type":"article","og_title":"pHionics STs - ORP (Redox) Sensor with 4-20mA output - OneTemp","og_description":"The pHionics STs Series\u2122 ORP sensor provides reliable ORP (redox) and temperature measurements to a datalogger, RTU, PLC, or SCADA system for continuous water quality monitoring. 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