pHionics STs Series Dissolved Oxygen Sensor

The pHionics STs Series™ Dissolved Oxygen sensor accurately measures dissolved oxygen and temperature (0-50°C) over long periods of time with little maintenance required.  These measurements are output via two noise-resistant 4-20 mA signals that easily connect to HOBO stations and HOBOnet motes with analog inputs. Available ranges are 0-20 mg/L or 0-200% saturation depending on the scaling you enter. A narrow diameter allows the STs Series to go where other sensors cannot while the durable, chemical-resistant housing ensures many years in-use.  The electrode tip (anode) has a large surface area that improves oxygen exchange consistency across the membrane while reducing the frequency of fouling.In contrast to other dissolved oxygen sensors that require membrane and reference solution replacement every 3-6 months, the STs Series Dissolved Oxygen sensor typically only requires electrode replacement every 2-3 years.  In addition, the rugged Teflon® membrane resists scratches and tears that would put other sensors out of commission.  When electrode replacement is needed, the procedure can be done within 30 seconds, as shown in the video below. All these features save you the time of having to perform maintenance.

• Galvanic electrode with a large surface area anode to increase stability and prevent cloggingSecondary 0-50°C temperature sensorChemical-resistant PVDF and 316 Stainless Steel housing (Titanium optional) for long-term monitoringNarrow diameter (0.75 inches or 1.9 cm)Removable electrode guard to reduce debris buildup and protect from damageFully submersible up to 70 psiShielded, Kevlar®-reinforced, water-blocked polyurethane cable4-20 mA signal capable of transmission up to 3 miles (with proper wire gauge)Patented pHiConn™ connections to easily replace any part without special toolsReversed Input Protection and OperationLow power usage for long-term water quality monitoringIsolated to prevent ground loopsSignal conditioning to remove background noise