Sensor Trios – Quan trắc thông số COD, BOD, pH, DO,…

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1- Description:

OPUS is the new generation of spectral sensors for online measurement of nitrogen and carbon compounds. Through the analysis of a full spectrum, OPUS is able to deliver reliable readings for NO3-N, NO2-N, organic ingredients (CODeq, BODeq, DOCeq, TOCeq), and a number of other parameters.

OPUS features the new TriOS G2 interface, allowing fast and easy configuration of sensors by using a web browser. Integration into existing process control systems and external data loggers has never been easier.

With the optional battery pack, mobile applications are also feasible. WiFi connectivity allows laptops, tablets or smartphones to be easily used for control without any special application software or app installation.

2- Technical data:

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
0,3 mm, 1 mm, 2 mm, 5 mm, 10 mm, 20 mm, 50 mm
Parameter
Nitrate NO3-N, Nitrite NO2-N, CODeq, BODeq, DOCeq, TOCeq,
TSSeq, KHP, SAC254, COD-SACeq, BOD-SACeq
Measurement accuracy
see measurement ranges next page
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

3- Measuring range

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

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