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. Patented RDO® Technology
EPA-approved optical RDO method makes Dissolved Oxygen sensors easy to use, with a multilayer, abrasion-resistant formulation, a smart cap that carries calibration onboard, and instant hydration to eliminate the need for conditioning prior to use.
Smart Sensor Cap
RDO sensing foils are calibrated at 90 discrete points, and the coefficients are stored in the replaceable cap. Simply press it on and you’re ready to go, no data entry or extra steps needed.
A unique, three-layer system provides unmatched chemical and abrasion resistance, extending the life of the sensor cap and expanding the range of compatible conditions.
Instant Hydration Conditioning
Unlike other DO sensors, the RDO formulation doesn’t require 12-24 hours of hydration conditioning and reads accurately within 90 seconds of going from dry to wet conditions.
All RDO instruments have an easy-to-configure Modbus interface, so they’re ready for integration into another system and access to data is reliable.
Ryton construction and complete internal potting to create a solid core provide strength and chemical resistance to eliminate most common failures.
Alcohols >5%; hydrogen peroxide > 3%; sodium
hypochlorite (commercial bleach) > 3%; gaseous
sulfur dioxide; gaseous chlorine. Do not use in organic
solvents (e.g., acetone, chloroform, methylene chloride,
etc.), which may swell the sensing element (foil matrix)
and destroy it.
100m (328ft) @ 25°C
IP-67 with sensor cap off; IP-68 with sensor cap installed
-5.0°C to + 50.0°C (23°F to 122°F)
150 psi from 0° to 50°C
-40°C to + 65°C (-40°F to 149°F)
L 22.06 cm (8.69 in) x D 2.95 cm (1.16 in)
Maximum (measurement): 50 mA at 12 VDC
8 to 36 VDC
1 reading every 1 second
2 years from date of shipment
205 g (0.5 lb) (without cable)
+/- 0.1 mg/L (0-20 mg/L)
Fixed or real-time capable
EPA-approved In-Situ® RDO methods 1002-8-2009,
1003-8-2009, 1004-8-2009 Standard Methods 4500-O
0-60 mg/L; 0-600% Saturation
-5°C to 50°C (23°F to 122°F)
|Response time, CAP||
T63<5s, T90<45s, T95<60s (RDO-X cap)
Fixed or real-time capable
Optical Dissolved Oxygen Sensor
mg/L, ppm, % saturation