STs Series Dissolved Oxygen Sensor
Description
The pHionics STs Series™ Dissolved Oxygen sensor (or sonde) accurately measures dissolved oxygen (0-20 mg/L or percent saturation) 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 compatible with most systems.
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 has a large surface area that improves oxygen exchange consistency across the membrane while reducing the frequency of fouling.
Ranges available:
- 0-20 mg/L or 0-200% saturation depending on scaling with datalogger or RTU
Quick Delivery!
Orders typically ship in 3-5 business days.
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STs Series Dissolved Oxygen Sensor Features List
- Galvanic electrode with a large surface area anode to increase stability and prevent clogging
- Secondary 0-50°C temperature sensor
- Chemical-resistant PVDF and 316 Stainless Steel housing (Titanium optional) for long-term monitoring
- Narrow diameter (0.75 inches or 1.9 cm)
- Removable electrode guard to reduce debris buildup and protect from damage
- Fully submersible up to 70 psi
- Shielded, Kevlar®-reinforced, water-blocked polyurethane cable
- 4-20 mA signal capable of transmission up to 3 miles (with proper wire gauge)
- Patented pHiConn™ connections to easily replace any part without special tools
- Automatic Temperature Compensation (2% per degree Celsius)
- Reversible Input Protection and Operation
- Low power usage for long-term water quality monitoring
- Isolated to prevent ground loops
- Signal conditioning to remove background noise
Accurate Measurements
No noise. No nonsense.
Experience the difference with our proprietary noise reduction technology.
Specifications
Dissolved Oxygen Sensor
| Output | 4-20 mA |
| Dissolved Oxygen Range | 0-20 mg/L (ppm) |
| Electrode Type | Galvanic cell with Teflon membrane |
| Minimum Flow Rate | 1.5 ft (0.457 m) per second |
| Transmitter Type | 2-wire |
| Automatic Temperature Compensation | 2% per °C |
| Isolation | 600 VDC |
| Operational Temperature Range | 0-70°C |
| Power Supply Voltage | 8-40 VDC |
| Loop Impedance (Max) |
200 Ohms at 12 VDC 800 Ohms at 24 VDC 1600 Ohms at 40 VDC |
| Response time | 95% < 180 seconds |
| Pressure Range | 0-70 psi |
| Wetted Materials | 316 Stainless Steel, PVDF, Viton™, Teflon®, silicone |
| Length | 14.25 in (36.20 cm) |
| Width | 0.750 in (1.9 cm) maximum |
| Weight (No cable) | 0.50 lbs (0.227 kg) |
| Linearity | ± 0.5% of full scale* |
| Accuracy | ± 2.0% of full scale* |
| Sensitivity | ± 0.05% of full scale |
| Stability | ± 2.0% of full scale |
| Repeatability | ± 1.0% of full scale |
*After proper calibration
Temperature Sensor
| Output | 4-20 mA |
| Temperature Range | 0-50°C |
| Accuracy | +/- 1°C |
| Linearity | +/- 0.5°C |
| Power Supply Voltage | 7-40 VDC |
Cable
| Cable Material | Polyurethane |
| Type | 4 conductor, Kevlar® reinforced, water blocked, shielded, twisted-pair wiring |
| Maximum Distance | 3 miles |
| Resistance per 1000 ft (304.8 m) | 26 Ohms |
| Replaceable? | Yes |
pHionics products comply fully with all applicable EU Directives to bear the CE Mark.
Kevlar® is aregistered trademark of DuPont™.
Viton™ is a trademark of Chemours.
STs Series Dissolved Oxygen Sensor Resources
- pHionics STs Series Device Manual
- Onset RX3000 Setup with pHionics STs Series Devices
- STs Series Dissolved Oxygen Sensor Quick Start Guide
- STs Series Dissolved Oxygen Membrane Replacement Guide
- STs Series Dissolved Oxygen FAQ
- Dissolved Oxygen Care and Troubleshooting
- STs Series Mounting Options
- STs Series Pipe Mounting Instructions
- STs Series Sensor Storage
Related Products
STs Series pH Sensor
STs Series Conductivity Sensor
