Product Details:
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Product Name: | UV Absorption COD Sensor | Product Model: | STACSENSE |
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Measure Principle: | UV 254 Nm Absorption | Compensation: | Turbidity At 530 Nm |
PH Range: | 2~12pH | Wave Lengths: | Internal Temperature |
Max. Immersion Depth: | 50m | Maximum Pressure: | 5 Bars |
Operating Temperature: | 0~40℃ | Protection Grade: | IP68 |
Highlight: | 254nm COD Analyzers,50m COD Sensor,RS485 COD Analyzers |
254nm UV Absorption COD Sensor With RS485 Digital Communication
Measurement Principle Of The UV Absorption COD Sensor
The UV absorption sensor uses UV absorption at 254 nm to measure organic compounds dissolved in water. This absorbance is correlated with the concentration of TOC, COD, and BOD to provide a high-performance online digital sensor requiring no consumables.
A reference measurement at 530 nm is used to compensate for the presence of particles in the sample that also absorb UV light and to establish the Turbidity parameter.
The use of a state-of-the-art high-performance UV LED, combined with rigorous ignition management, offers an optimal variance of the signal.
Application Of The UV Absorption COD Sensor
Drinking water: monitoring Organic matter in raw water, oxidation process, coagulation, activated carbon filtration.
Advantages of The UV Absorption COD Sensor
Multi-parameter measurement: SAC254, CODeq, TOCeq & BODeq, Turbidity eq
UV 254 spectral absorption without any reagents or consumables
Automatic Turbidity compensation.
Interference-proofing: pre-amplification built into the sensor and digital signal processing
Connect to any type of recorder, transmitter, remote management system or PLC using a Modbus RS-485 input
All calibration, history, user, and measurement data are processed directly in the UV COD Probe and transmitted by a Modbus RS-485 or SDI-12 link.
Technical Characteristics
Product Name |
UV Absorption COD Sensor |
Product Model | STACSENSE |
Measure Principle |
UV 254 nm absorption |
Compensation |
Turbidity at 530 nm |
Wave lengths |
Internal temperature |
Type of detector |
254 nm (turbidity correction at 530 nm) |
Light sources |
Silicon Photodiode |
Optical paths |
LED UV 254±5nm and 530±5 nm |
Measurement frequency |
2 and 50 mm |
Protection Grade |
IP68 |
Max. immersion depth |
50 meters |
Maximum pressure |
5 bars |
Operating temperature |
0~40°C |
Storage temperature |
-10°C~50°C |
PH range |
2~12pH |
Dimensions (D x L) (mm) |
48x371 or 48x419 (see overall dimensions diagram) |
Weight |
1600~1800g depending on the optical path (cable not included) |
Equipment |
Body: Stainless steel 316 (1.4401) Optical windows: Quartz (Corning 7980) Cable: Bare wire with polyurethane sheath Seals: Fluoroelastomer (FPM/FKM) |
Cable |
9 shielded conductors in 3,7 and 15m. Other lengths on request |
Signal interface |
Modbus1 RTU (RS-485) / SDI122,3 (TTL) 1 Sensor mute in Modbus for up to 2s between the measurement request and the possibility to read the measurements or status 2 Using SDI12, measurement result frame after up to 2s instead of the 850ms standard delay. The sensor responds in Modbus / SDI12 including when on Standby 3 The use and connexion of SDI12 bus may increase the standby power consumption* up to 40uA depending the level of the line (high or low). The consumption is not increased if the SDI12 line is disconnected or released to 0V (Modbus RTU only). |
Sensor power supply |
5.4 V 1,2 at 26 V 3 DC 1 Absolute minimum 5.2 V with 1 m of cable 2 Minimum voltage subject to cable length-related losses 3 28.0 V absolute maximum |
Typical consumption at 5.4 V |
Automatic standby less than 10 μA (54 μW) Maximum peak current: 600 mA (2 ms) Maximum current during the measurement: 100 mA (540 mW) Average current during the measurement: 70 mA (378 mW) Average current (1 measurement / 2s): 35 mA (189 mW) Energy for 1 measurement (1.5 s): 158 μWh |
Typical consumption at 12 V |
Automatic standby less than 10 μA (120 μW) Maximum peak current: 400 mA (1.5 ms) Maximum current during the measurement: 70 mA (840 mW) Average current during the measurement: 60 mA (720 mW) Average current (1 measurement / 2s): 30 mA (360 mW) Energy for 1 measurement (1.5 s): 300 μWh |
Typical consumption at 24 V |
Automatic standby less than 10 μA (240 μW) Maximum peak current: 300 mA (1 ms) Maximum current during the measurement: 65 mA (1560 mW) Average current during the measurement: 50 mA (1200 mW) Average current (1 measurement / 2s): 25 mA (600 mW) Energy for 1 measurement (1.5 s): 500 μWh |
EMC compliance |
NF EN 61326-1: 2013-05 RS-485 Modbus RTU & SDI12 1 The sensor is qualified for standard use with a dedicated cable including power supply and communication lines specific to the sensor network. 2 When connected to a DC power supply network separated from the RS485 communication lines; additional shielding must be used on the system to protect the sensors from shock waves from an impact. |
Warranty | 2 years |
Dimensions Of The UV Absorption COD Sensor
Op.T |
Parameters |
Measurement Range* | Units | Detection Limit |
Quantification Limit |
Accuracy** | Application |
2mm |
SEC254 |
0-750 |
Abs/m |
1.7 |
5.0 |
1 or +/-3% |
Wastewater |
CODeq |
0-1300 |
mg/L |
3.0 |
9.0 |
2 or +/-3% |
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BODeq |
0-350 |
mg/L |
1.0 |
3.0 |
1 or +/-3% |
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TOCeq |
0-500 |
mg/L |
1.5 |
4.0 |
1 or +/-3% |
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Turbidity eq |
0-500 |
FAU |
1.5 |
5.0 |
5 or +/-5% |
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5mm |
SEC254 |
0-30 |
Abs/m |
0.20 |
0.3 |
0.1 or +/-3% |
Drinking water |
CODeq |
0-50 |
mg/L |
0.15 |
0.6 |
0.2 or +/-3% |
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BODeq |
0-15 |
mg/L |
0.10 |
0.2 |
0.1 or +/-3% |
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TOCeq |
0-20 |
mg/L |
0.10 |
0.2 |
0.1 or +/-3% |
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Turbidity eq |
0-40 |
FAU |
0.40 |
1.2 |
1.0 or +/-7% |
Performance levels obtained under laboratory conditions (controlled temperature and stirring, aqueous solutions of KHP)
*Optical path 2 and 50mm, Linearity: > 0.99 on the given range.
**Highest value
Electrical Connections Of The UV Absorption COD Sensor
Contact Person: Ms. Yuki Fu
Tel: +8615716217387