RDO Blue Optical 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 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.

DO MORE FOR LESS

RDO Blue sensors are low power, low maintenance, and low cost so you can monitor wherever you need to. Instead of spot-checking sites with a shared probe or installing one sensor per site, pond, or tank, you can affordably install RDO Blue in multiple locations for comprehensive insight about DO conditions that affect your aquatic organisms.

For aquaculture applications, this will help you optimize aeration and feeding to lower operational costs while maintaining the health of your stock. For environmental applications, access to data from more locations allows you to fully characterize your site, identify problem areas, and gain valuable insight to guide decisions.

ENHANCED RELIABILITY

The redesigned RDO Blue is made from Ryton, a high-performance material used to replace metal parts in automotive and heavy industrial applications. It’s lightweight, strong, and resistant to chemicals, corrosion, abrasion, UV exposure, and high heat.

Anti-rotational teeth lock the housing and sensor tip together to provide a strong, reliable connection between parts. Internal potting around the cable connection ensures the electronics are protected from humidity even in tough conditions.

SHARED ECOSYSTEM

With the Twist-Lock option, RDO Blue plugs into the In-Situ ecosystem and allows you to collect readings, calibrate, and manage the instrument with a Wireless TROLL Com and VuSituTM. This mobile solution keeps your data organized and geographically accurate by enabling data collection at distinct sites with GPS tags. With your logged data, you can conveniently email, share or export log files right from your mobile device so that your information is accessible when you need it.

You can also connect RDO Blue to VuLinkTM to create a simple and complete solution with power, logging, and telemetry for your critical DO data. With HydroVuTM for advanced data visualization and site information, you get a comprehensive overview of your monitoring sites and can set up alarms for notification of critical site conditions.

Applications

• POND AQUACULTURE

• RECIRCULATING AQUACULTURE SYSTEMS

• OPEN PEN AQUACULTURE

• SURFACE WATER SPOT SAMPLING

• REMOTE MONITORING VIA TELEMETRY

RDO BLUE FEATURES PATENTED RDO TECHNOLOGY, INCLUDING

EPA-Approved Method RDO luminescence-quenching sensors have been proven through extensive lab testing, and the methodology has been approved by the United States EPA. RDO sensors do not consume oxygen and do not require water movement for accurate measurements.

Smart Sensor Cap RDO sensing foils are calibrated at 90 discrete points and the calibration coefficients are stored in the replaceable cap. Simply press it on and you’re ready to go, no data entry or extra steps needed.

Abrasion Resistance 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 RDO sensors do not require 12-24 hours of hydration conditioning and read accurately within 90 seconds of going from dry to wet conditions.

Liquid and Gas Formulation The RDO system measures accurately in both liquid and gas without requiring separate calibrations or change of settings.

Smart Addressing 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.

Enhanced Reliability The RDO Blue’s construction out of Ryton with complete internal potting creates a solid core and provides strength and chemical resistance to eliminate most common failures.

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)  +/-2% (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, TEMP - -5°C to 50°C (23°F to 122°F)

ACCURACY, TEMP - +/- 0.1ºC

RESOLUTION, TEMP - 0.01ºC

UNITS TEMP - Celsius, Fahrenheit

SALINITY COMP - Fixed or real-time capable

BAROMETRIC COMP - 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

ENVIRONMENTAL RATINGS

PRESSURE - 150 psi from 0° to 50°C

DEPTH - 100m (328ft) @ 25°C

OPERATING TEMP. (NON-FREEZING) - -5.0°C to + 50.0°C (23°F to 122°F)

STORAGE TEMP - -40°C to + 65°C (-40°F to 149°F)

COMPLIANCE -  EMC 2014/30/EU IEC 61000-6-2:2005 EN 55011:2009

IP RATING -  IP-67 with sensor cap off; IP-68 with sensor cap installed

CHEMICAL RATINGS

INTERFERENCES - 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.

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 - Ryton® (PPS), Cycoloy® (PC/ABS), PC/PMMA

COMMUNICATION OUTPUT - Modbus/RS485

READING RATE - 1 reading every 1 second

POWER REQUIREMENTS - 8 to 36 VDC

POWER CONSUMPTION - Maximum (measurement): 50 mA at 12 VDC Idle (communication only): 2 mA at 12 VDC

WARRANTY - 2 years from date of shipment