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254nm UV Absorption Online COD Analyzers RS485 Digital Communication

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    Buy cheap 254nm UV Absorption Online COD Analyzers RS485 Digital Communication from wholesalers
     
    Buy cheap 254nm UV Absorption Online COD Analyzers RS485 Digital Communication from wholesalers
    • Buy cheap 254nm UV Absorption Online COD Analyzers RS485 Digital Communication from wholesalers

    254nm UV Absorption Online COD Analyzers RS485 Digital Communication

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    Brand Name : Daruifuno
    Model Number : STACSENSE
    Certification : CE
    Price : Negotiable
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    254nm UV Absorption Online COD Analyzers RS485 Digital Communication


    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

    • Urban wastewater treatment: detecting organic load variations during input /treatment process /output.
    • Industrial effluent treatment.
    • Surface water monitoring
    • Fish farming
    • Aquaculture (freshwater)
    • 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 ModelSTACSENSE

    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.

    Warranty2 years

    Dimensions Of The UV Absorption COD Sensor



    Op.T

    Parameters

    Measurement Range*UnitsDetection 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%

    BODeq

    0-350

    mg/L

    1.0

    3.0

    1 or +/-3%

    TOCeq

    0-500

    mg/L

    1.5

    4.0

    1 or +/-3%

    Turbidity eq

    0-500

    FAU

    1.5

    5.0

    5 or +/-5%

    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%

    BODeq

    0-15

    mg/L

    0.10

    0.2

    0.1 or +/-3%

    TOCeq

    0-20

    mg/L

    0.10

    0.2

    0.1 or +/-3%

    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



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