RDO® Blue Optical Rugged Dissolved Oxygen Sensor
RDO® Blue uses In-Situ’s patented Optical Rugged Dissolved Oxygen technology, an EPA-approved dissolved oxygen measurement method ideal for measuring DO and temperature in even the harshest environments. Suitable for handheld use or long-term deployment in fresh water or saltwater, this low-maintenance dissolved oxygen probe offers robust performance at a lower cost than other DO meters.
RDO Blue requires no calibration or conditioning prior to deployment and doesn’t use membranes. The replaceable RDO Smart Sensor Cap stores calibration coefficients for automatic, error-free setup. And a unique, three-layer system provides unmatched chemical and abrasion resistance.
Use included Modbus/RS485 communication protocol to easily integrate with PLC systems or telemetry with HydroVu data services for real-time feedback and process control.
RDO BLUE IS AN OPTICAL DISSOLVED OXYGEN SENSOR DESIGNED FOR DEMANDING ENVIRONMENTS WHERE YOU NEED RELIABLE DO MEASUREMENTS AND WIDESPREAD COVERAGE TO OPTIMIZE YOUR SITE.
RDO Blue is suitable for freshwater or saltwater applications and is ready for connection with transmitters, controllers, dataloggers or telemetry. RDO Blue can also be used in a hand-held configuration for spot-checks and site assessments.
General Ratings
| Dimensions | L 22.06 cm (8.69 in) x D 2.95 cm (1.16 in) |
| Weight | 205 g (0.5 lb) (without cable) |
| Wetted Materials | Polyphenylene Sulfide (PPS) (housing, guard), Polycarbonate/Acrylonitrile Butadiene Styrene (PC/ABS) blend (sensor nose), Polycarbonate/Polymethylmethacrylate (PC/PMMA) blend (RDO cap), Acrylonitrile Butadiene Rubber (NBR) (O-rings), FKM Fluoroelastomer (O-rings), Thermoplastic Polyurethane (TPU) (cable jacket, strain relief cone), Titanium (Twist-Lock connector on applicable product models), Proprietary RDO sensing formulation (RDO cap tip) |
| Communication Output | Modbus/RS485 |
| Reading Rate | 1 reading every 1 second |
| External Power Requirements | 8 to 36 VDC (20mA at 8 VDC peak) |
| Power Consumption | Power On: 3mA at 16 VDC for 0.7s Reading: 8mA at 16 VDC for 0.75s Idle: 2mA at 16 VDC |
| Warranty | 2 years from date of shipment |
Sensor Ratings
| Sensor Type | Optical Dissolved Oxygen Sensor |
|---|---|
| Range, DO | 0-60 mg/L; 0-600% Saturation |
| Accuracy, DO | +/- 0.1 mg/L (0-20 mg/L) +/-5% (20-60 mg/L) |
| Resolution, DO | 0.01 mg/L |
| Response Time, CAP | T63<5s, T90<45s, T95<60s (RDO-X cap) |
| Units, DO | mg/L, ppm, % saturation |
| Range, Temperature | -5°C to 50°C (23°F to 122°F) |
| Accuracy, Temperature | +/- 0.1ºC |
| Resolution, Temperature | 0.01ºC |
| Units, Temperature | Celsius, Fahrenheit |
| Salinity Compensation | Fixed or real-time capable |
| Barometric Compensation | Fixed or real-time capable |
| Methods | EPA-approved In-Situ® RDO methods 1002-8-2009, 1003-8-2009, 1004-8-2009 Standard Methods 4500-O Compliant with ASTM D888-18 Method C and ISO 17289 methods. |
