TriOS OPUS UV Spectral Sensor
The TriOS OPUS is a full spectrum sensor that can deliver reliable readings for nitrate, nitrite, COD, BOD, DOC, TOC, and a number of other parameters.
Features
- Internal compensation for temperature, turbidity, and organic substances
- RS-485 Modbus RTU output for integration with data collection platforms
- Optional W55 V2 wiper cleans optics & reduces maintenance intervals
Your Price
Call
Stock
1
AVAILABLE
Fondriest Exclusives
- Expedited repair and warranty service
- Lifetime technical support
- More
Overview
The TriOS OPUS is a spectral sensor for the online measurement of nitrogen and carbon compounds. By analyzing a full spectrum, OPUS is able to deliver reliable readings for N-NO3, N-NO2, organic ingredients (COD, BOD, DOC, TOC) and a number of other parameters.
Mechanics
Substances with a specific absorption spectrum, such as nitrate and nitrite, can be used directly as elements of the spectral analysis group. For sum parameters, such as COD, BOD, TOC and DOC, theoretical absorption spectra that TriOS has been able to determine over the course of its many years of experience have been stored. Using these parameters, a spectral analysis based on UV absorption can use only the portion that absorbs UV light. Therefore, the OPUS uses only equivalents, and the parameters have the “eq” suffix appended to them, (i.e. CODeq, BODeq, TOCeq and DOCeq). The spectral analysis group also contains correction spectra that take into account, for example, the effects of turbidity. Because the entire absorption spectrum is detected, parameters such as SAC254 (spectral absorption coefficient at 254nm) can also be calculated.
Integration
The OPUS is compatible with the G2 interface box, allowing fast and easy configuration of the sensors using a web browser. The sensor can be easily integrated into existing process control systems and external data loggers using the native RS-485 Modbus RTU output, and the optional W55 V2 wiper reduces maintenance intervals by cleaning the optics before each measurement.
|
Light source
|
Xenon flash lamp
|
|
|
Detector
|
High-end miniature spectrometer
256 Channels
200 to 360 nm
0.8 nm/pixel
|
|
|
Measurement principle
|
Attenuation, spectral analysis
|
|
|
Optical path
|
0.3mm, 1mm, 2mm, 5mm, 10mm, 20mm, 50mm
|
|
|
|
||
|
Parameter
|
Nitrate NO3-N, Nitrite NO2-N, CODeq, BODeq, DOCeq, TOCeq,
TSSeq, KHP, SAC254, COD-SACeq, BOD-SACeq
|
|
|
Measurement accuracy
|
See measurement ranges below
|
|
|
Turbidity compensation
|
Yes
|
|
|
Data logger
|
~ 2 GB
|
|
|
T100 response time
|
2 min
|
|
|
Measurement interval
|
≥ 1 min
|
|
|
|
||
|
Housing material
|
Stainless steel (1.4571/1.4404) or titanium (3.7035)
|
|
|
Dimensions (L x Ø)
|
470 mm x 48 mm (bei 10 mm path)
|
~ 18.5“ x 1.9“ (with 10 mm path)
|
|
Weight stainless steel
|
~ 3 kg (bei 10 mm path)
|
~ 6.6 lbs (with 10 mm path)
|
|
Weight titanium
|
~ 2 kg (bei 10 mm path)
|
~ 4.4 lbs (with 10 mm path)
|
|
|
||
|
Interface digital
|
Ethernet (TCP/IP), RS-232 or RS-485 (Modbus RTU)
|
|
|
Power consumption
|
≤ 8 W
|
|
|
Power supply
|
12...24 VDC (± 10 %)
|
|
|
|
|
|
|
Maintenance effort
|
≤ 0.5 h/month (typical)
|
|
|
Calibration/maintenance interval
|
24 months
|
|
|
System compatibility
|
Modbus RTU
|
|
|
Warranty
|
1 year (EU: 2 years)
|
US: 2 years
|
|
|
||
|
Max. pressure with SubConn
|
30 bar
|
~ 435 psig
|
|
Max. pressure with fixed cable
|
3 bar
|
~ 43.5 psig
|
|
Max. pressure in FlowCell
|
1 bar, 2...4 L/min
|
~ 14.5 psig at 0.5 to 1.0 gpm
|
|
Protection type
|
IP68
|
NEMA 6P
|
|
|
||
|
Sample temperature
|
+2...+40 °C
|
~ +36 °F to +104 °F
|
|
Ambient temperature
|
+2...+40 °C
|
~ +36 °F to +104 °F
|
|
Storage temperature
|
-20...+80 °C
|
~ -4 °F to +176 °F
|
|
Inflow velocity
|
0,1...10 m/s
|
~ 0.33 fps to 33 fps
|
|
Parameter
|
Measurement Principle
|
Unit
|
Factor
|
Path Length (mm)
|
|||||||
|
|
|
|
|
0.3
|
1
|
2
|
5
|
10
|
20
|
50
|
|
|
absorbance
|
spectral
|
AU**
|
-
|
0.01...2.2
|
0.01...2.2
|
0.01...2.2
|
0.01...2.2
|
0.01...2.2
|
0.01...2.2
|
0.01...2.2
|
|
|
absorbance
|
spectral
|
1/m
|
-
|
50...7300
|
15...2200
|
7.5...1100
|
3...440
|
1.5...220
|
0.75...110
|
0.3...44
|
|
|
Nitrate N-NO3
|
spectral
|
mg/L
|
-
|
1.0...330
|
0.3...100
|
0.15...50
|
0.06...20
|
0.03...10
|
0.015...5
|
0,006...2
|
|
|
Nitrate NO3
|
spectral
|
mg/L
|
-
|
4.43...1460
|
1.33...440
|
0.67...220
|
0.27...88
|
0.13...44
|
0.067...22
|
0.030...9
|
|
|
Nitrite N-NO2
|
spectral
|
mg/L
|
-
|
1.7...500
|
0.5...150
|
0.25...75
|
0.1...30
|
0.05...15
|
0.025...7.5
|
0.01...3
|
|
|
Nitrite NO2
|
spectral
|
mg/L
|
-
|
5.6...1650
|
1.65...500
|
0.82...250
|
0.33...100
|
0.17...50
|
0.083...25
|
0.033...10
|
|
|
DOCeq
|
spectral
|
mg/L
|
-
|
17...3300
|
5.0...1000
|
2.5...500
|
1.0...200
|
0.5...100
|
0.25...50
|
0.1...20
|
|
|
TOCeq
|
spectral
|
mg/L
|
-
|
17...3300
|
5.0...1000
|
2.5...500
|
1.0...200
|
0.5...100
|
0.25...50
|
0.1...20
|
|
|
CODeq
|
spectral
|
mg/L
|
-
|
100...7300***
|
30...2200***
|
15...1100***
|
6.0...440***
|
3.0...220***
|
1.5...110***
|
0.6...44***
|
|
|
BODeq
|
spectral
|
mg/L
|
-
|
100...7300***
|
30...2200***
|
15...1100***
|
6.0...440***
|
3.0...220***
|
1.5...110***
|
0.6...44***
|
|
|
KHP
|
spectral
|
mg/L
|
-
|
17...13300
|
5.0...4000
|
2.5...2000
|
1.0...800
|
0.5...400
|
0.25...200
|
0.1...80
|
|
|
SAC254
|
Single wavelength
|
1/m
|
-
|
50...7300
|
15...2200
|
7.5...1100
|
3.0...440
|
1.5...220
|
0.75...110
|
0.3...44
|
|
|
COD-SACeq****
|
Single wavelength
|
mg/L
|
1.46
|
75...10600
|
22...3200
|
11...1600
|
4.4...640
|
2.2...320
|
1.1...160
|
0.44...64
|
|
|
BOD-SACeq*****
|
Single wavelength
|
mg/L
|
0.48
|
24...3500
|
7.2...1050
|
3.6...525
|
1.44...210
|
0.72...105
|
0.36...52.5
|
0.15...21
|
|
|
TSSeq*****
|
Single wavelength
|
mg/L
|
2.6
|
130...4300
|
40...1300
|
20...650
|
8.0...260
|
4...130
|
2.0...65
|
0.8...26
|
|
|
under laboratory conditions
** absorbance unit
*** depending on the composition of the COD and BOD (sum parameter)
**** based on KHP (Note: 100 mg/L COD-standard-solution corresponds to 85 mg/L KHP)
***** based on SiO2
Note:
1 mg/L N-NO3 corresponds to 4.43 mg/L NO3
1 mg/L N-NO2 corresponds to 3.28 mg/L NO2
|
|||||||||||
- (1) OPUS UV Spectral Sensor
- (1) Fitting for compressed air cleaning
- (1) Calibration certificate
- (1) Operations manual
- Note: Included parameters are temperature, SAC254, and TSS. Addtional parameters must be ordered separately as calibrations (see Accessories tab).
Questions & Answers
Select Options
Products
0 Item Selected
Image
Part #
Description
Price
Stock
Quantity
12S401010
OPUS UV spectral sensor with 10mm path length & stainless steel housing, MCBH-8-MP connector
Request Quote
1 Available
12S402010
OPUS UV spectral sensor with 10mm path length & titanium housing, MCBH-8-MP connector
Request Quote
Check Availability
12S301010
OPUS UV spectral sensor with 5mm path length & stainless steel housing, MCBH-8-MP connector
Request Quote
Check Availability
12S302010
OPUS UV spectral sensor with 5mm path length & titanium housing, MCBH-8-MP connector
Request Quote
Check Availability
12S201010
OPUS UV spectral sensor with 2mm path length & stainless steel housing, MCBH-8-MP connector
Request Quote
Check Availability
12S202010
OPUS UV spectral sensor with 2mm path length & titanium housing, MCBH-8-MP connector
Request Quote
Check Availability
Accessories
0 Item Selected
Notice: At least 1 product is not available to purchase online
Related Products
In The News
Monitoring New Hampshire’s Aquatic Ecosystems: Continuous Data Collection in the Lamprey River Watershed
New Hampshire’s aquatic ecosystems provide a range of ecosystem services to the state and region. Resources and services like clean water, carbon storage, climate regulation, nutrient regulation, and opportunities for recreation all depend on New Hampshire’s aquatic ecosystems remaining healthy. Jody Potter, an analytical instrumentation scientist at the University of New Hampshire (UNH), is studying these aquatic ecosystems in hopes of developing an improved understanding of ecosystem services and their interactions with climate change, climate variability, and land use changes.
Floating Global New Ideas: Buoy-Enabled Research at Florida Agricultural and Mechanical University’s School of the Environment
Florida Agricultural and Mechanical University (FAMU), based in Tallahassee, Florida, is the highest-rated public Historically Black College or University in the United States. FAMU’s School of the Environment (FAMU-SOE) offers BS and BA degrees in Environmental Studies, and BS, MS, and Ph.D. degrees in Environmental Science, with specialisms available in areas including Environmental Policy and Risk Management, Aquatic and Terrestrial Ecology, and Biomolecular Sciences. In 2021, FAMU-SOE deployed a NexSens CB-450 buoy in Apalachee Bay, a key oyster farming area around 30 miles south of Tallahassee. The buoy has quickly been incorporated into the curriculum, providing environmental insights for student research, the community, and beyond. Dr.
Testing CO2 Removal Strategies in the Pacific Northwest
The ocean plays a key role in carbon dioxide (CO2) removal and storage, also known as carbon sequestration. However, with increasing emissions, a large amount of CO2 escapes into the atmosphere, worsening climate change and leading to increases in surface temperatures. In order to mitigate some of these impacts, researchers like Ally Savoie at the Pacific Northwest National Laboratory (PNNL) are working hard to identify ways to safely improve the CO2 removal and storage capabilities in the ocean. Savoie started her career at Wright State University , where she worked in Silvia Newell’s lab examining biogeochemical cycling of nutrients in a river system. From there, she decided to pursue a master’s in marine science at the University of Southern Mississippi with Dr.
Smart Buoys Advance Climate Monitoring in Swiss Lakes
Lakes are sentinels of climate change . Globally, they are warming at an unprecedented but uneven rate, and in many places they also face direct human pressure, including from agriculture and recreation. In the Alps, scientists generally agree that climate change is of particular threat to remote lakes , where more pronounced warming threatens fragile ecosystems. Alpine Lakes in a Changing Climate Matteo Tonellotto is part of the team at the Environmental Observatory of the Italian-speaking region of Switzerland (OASI)–a multidisciplinary team of scientists, IT specialists, and chemical laboratory technicians committed to collecting, managing, and integrating high-quality environmental data.
