RDO
LIQ-PDS-RDO
Product Data Sheet
July 2017
Rosemount
TM
RDO
Optical Dissolved Oxygen Sensor and Analyzer
A low maintenance system for easily measuring dissolved oxygen
The RosemountTM RDO is a complete system consisting of an optical dissolved oxygen sensor and analyzer. The system is ideal for
use in wastewater aeration basins and ponds.
Rosemount RDO Optical Dissolved Oxygen Sensor and Analyzer Rosemount RDO Optical Dissolved Oxygen Sensor and Analyzer
July 2017 July 2017
Overview
Ease of Use and Maintenance
Easy automatic air calibration.
Low maintenance sensing cap only requires replacement
every two years.
Rear facing 1-1/4 in. FNPT process connection for easy
submersion type installations.
Accurate readings ±0.1 ppm between 0 and 8 ppm.
Measures dissolved oxygen using the fluorescence
quenching method.
Contents
Ordering Information ..................................................................................................................................................................... 3
Specifications ................................................................................................................................................................................. 4
Dimensional Drawings ................................................................................................................................................................... 5
Accessories .................................................................................................................................................................................... 6
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Ordering Information
The Rosemount RDO system consists of one or two sensors, a transmitter,
and mounting hardware. A calibration cup for air calibration is included
with the sensor. Sensors are available with a standard 10 m of integral cable
or a choice of twist-lock connector cables up to 30 m.
Table 1. Rosemount RDO Optical Dissolved Oxygen System Ordering Information
Model Sensor type
RDO Optical Dissolved Oxygen Sensor
Analyzer
94030 RDO Pro Analyzer
Sensor 1
00 No selection
82490X RDO Pro-X sensor with twist-lock connector
86460X RDO Pro-X sensor with 10 m cable
Sensor 2
00 No selection
82490X RDO Pro-X sensor with twist-lock connector
86460X RDO Pro-X sensor with 10 m cable
Cable 1
00 No selection
CBL10 RDO 10 m (32 ft) twist-lock connector cable
CBL20 RDO 20 m (64 ft) twist-lock connector cable
CBL30 RDO 30 m (96 m) twist-lock connector cable
Cable 2
00 No selection
CBL10 RDO 10 m twist-lock connector cable
CBL20 RDO 20 m twist-lock connector cable
CBL30 RDO 30 m twist-lock connector cable
Mounting kit
00 No selection
87560 RDO Pro instrument mounting kit
Instrument tags
00 No tags
01 1 engraved stainless steel tag
02 2 engraved stainless steel tags
03 3 engraved stainless steel tags
Typical model number: RDO-94030-82490X-00-CBL10-00-87560-01
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Rosemount RDO Optical Dissolved Oxygen Sensor and Analyzer Rosemount RDO Optical Dissolved Oxygen Sensor and Analyzer
July 2017 July 2017
Specifications
Table 2. Rosemount RDO Optical Dissolved Oxgyen Sensor Specifications
Range 0 to 20 ppm (mg/L) or 0 to 200% saturation
1
Wetted materials Delrin
Accuracy ±0.1 ppm between 0 and 8 ppm; ±0.2 ppm between 8 and 20 ppm
Dimensions Length: 8.0 in. (203 mm); Diameter: 1.9 in. (47 mm)
Rating IP-67 with cap off; IP-68 with cap installed
Integral cable length 32 ft (10 m)
Maximum cable length (quick disconnect cable only) 4000 ft (1219 m)
Interferences Monochloramine, dichloramine, and permanganate
Resolution 0.01 ppm (mg/L)
Temperature 0 to 50 °C (32 to 122 °F)
Pressure Up to 314 psig (2060 kPa abs)
Digital output Modbus/RS485
Process connections 1-1/4 in. FNPT
Response time 30 sec to 90% of final value; 37 sec to 95% of final value (at 25 °C [77 °F])
Operating life of sensing cap 2 years from first reading
Safety directive 73/23/EEC
EU directives 2004/108/EC for electromagnetic compatibility (EMC) and 72/23/EEC for safety
, ABS, Viton2, titanium, polycarbonate/poly(methyl methacrylate) blend
Immunity EN 61000-6-2, electromagnetic compatibility (EMC) part 6-2
Emissions Class A requirements of CISPR 11: 2004
1 Delrin is a registered trademark of DuPoint DeNemours, LLC
2. Viton is a registered trademark of DuPont Dow Elastomers, LLC.
Table 3. Rosemount RDO Optical Dissolved Oxgyen Analyzer Specifications
Display Liquid crystal; character height 0.4 in. (6 mm)
Enclosure Polycarbonate, rated NEMA 4X, IP67
Mounting Suitable for pipe or wall mounting
Dimensions (W x H x D) 6.3 x 6.3 x 3.6 in. (16 x 16 x 9.0 cm)
Conduit openings Sic; PG 13.5 (1/2 in.); three gland fittings and five plugs ship with the analyzer
Power 100 to 240 Vac, approximately 0.15 A, 50-60 Hz
Analog outputs Two fully scalable 4-20 mA outputs, each loop-powered (9-36 Vdc)
Digital output Modbus/RS485
Relays Two low voltage relays, < 50 Vac or Vdc, maximum current 2 A (resistive or inductive)
two high voltage relays, 264 Vac max, maximum current 5 A (resistive or inductive)
Barometric pressure range 8.86 to 29.53 in Hg (300 to 1000 mbar)
Barometric pressure accuracy ±0.09 in Hg (±3 mbar)
Ambient temperature and humidity -20 to 70 °C (-4 to 158 °F); 95% relative humidity (non-condensing)
Safety UL 61010-1 and CAN/CSA C22.2 #61010-1
EU directives 2004/108/EC for electromagnetic compatibility (EMC)
Immunity EN 61000-6-2, electromagnetic compatibility (EMC) part 6-2
Emissions EN61000-6-4 electromagnetic compatibility; includes IEC/EN 61000-3-2 and IEC/
EN61000-3-3 where applicable
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Dimensional Drawings
Figure 1. Analyzer Dimensions with Lid Closed
Figure 3. Sensor Side View
Figure 2. Analyzer Side View
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Rosemount RDO Optical Dissolved Oxygen Sensor and Analyzer Rosemount RDO Optical Dissolved Oxygen Sensor and Analyzer
July 2017 July 2017
Accessories
Table 4. Rosemount RDO Accessories
Part number Description
R0094030 RDO Pro analyzer, AC power, no data logging (includes three cable gland fittings and five plugs)
R0086460X RDO Pro-X sensor with 32 ft (10 m) integral cable
R0082490X RDO Pro-X sensor with twist lock connector for use with twist-lock connector cable
R0087650 RDO analyzer pipe and wall mounting kit
R00CBL10 Twist-lock connector cable, 32 ft (10 m)
R00CBL20 Twist-lock connector cable, 64 ft (20 m)
R00CBL30 Twist-lock connector cable, 96 ft (30 m)
R0080810 RDO O-ring replacement kit
R0080820 RDO replacement nose cone kit
R0088890 RDO replacement calibration cup
R0087630 Replacement dessicant bag for analyzer
R0084230X RDO Pro-X sensor cap replacement kit
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Notes
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Rosemount RDO Optical Dissolved Oxygen Sensor and Analyzer
LIQ-PDS-RDO
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Product Data Sheet
July 2017
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