Aquas INC.

- Model SMR46 Series - Biochemical Oxygen Demand Analyzer

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Biochemical Oxygen Demand Analyzer is connected directly via RS485 communication interface, providing simple, reliable, cost- saving process data with remote monitoring, calibration, configuration and diagnostics capabilities. The Biochemical Oxygen Demand Meter housing in a robust IP68 proof enclosure, 1500 N tensile strength Kevlar reinforced cable,, up to 1.2 km digital data transmission,BOD Analyzer and BOD meter is ideally used in water/wastewater industry.

  • Robust IP68 Water Submersible Enclosure, Solution Without Cabinet
  • On-line Realtime Measurement
  • Ultra Low Power Consumption, Ideal for Outdoor Applications
  • High Reliability, Drift Free
  • Surge Protection for Power and RS485 Communication
  • 1.2 Km RS485 Digital Communication, Minimize Cabling and Engineering Cost
  • Software Configuration Calibration and Data Monitoring
  • Standard Modbus RTU Protocol, Direct Connected with PLC, HMI, Eliminate I/O Module Cost
  • Auto Cleaning, Almost No Maintenance
  • Turbidity or Total Suspended Solids Measurement and Compensation
  • Onboard memory allowing users to easily calibrate and configure sensor at lab and distribute to various fields sites

  • Measurement range :
    • SMR46-1: 0~25 mg/L
    • SMR46-2: 0~100 mg/L
    • SMR46-3: 0~500 mg/L
    • SMR46-4: 0~1,000 mg/L
    • SMR46-5: 0~5,000 mg/L
  • Accuracy : ±5% in standard solution
  • Resolution : 0.01 mg/L
  • Repeatability : ±3% in standard solution
  • Light source : LED 254 nm
  • Beam angle : 180°
  • Light path length : 1 mm, 2 mm, 5 mm, 10 mm, 35 mm
  • Process flow rate : Max.3m/sec
  • Operation pressure : Max.10 Kgf/cm2
  • Operating temperature : 0~85 °C
  • Response time : <1 min
  • Protection : IP68
  • Turbidity sensor : LED 880 nm
  • Turbidity measurement range :
    • SMR46-1: 0~100 NTU (or 0~200 mg/L)
    • SMR46-2: 0~1,000 NTU (or 0~2,000 mg/L)
    • SMR46-3: 0~2,000 NTU (or 0~5,000 mg/L)
    • SMR46-4: 0~4,000 NTU (or 0~10,000 mg/L)
    • SMR46-5: 0~10,000 NTU (or 0~20,000 mg/L)
  • Turbidity accuracy : ±5%FS
  • Housing : SS316L; Titanium
  • Dimension : Φ 39 Χ 320 mm
  • Weight : analyzer: approx. 1 Kg; Cable: 80g/m

  • Drinking water, surface water, industry, water treatment, wastewater

  • Output Signal:RS485 (Modbus RTU protocol), 19,200 bps, 8 data bits, no parity, 1 stop bit; 4~20 mA (optional)
  • Data Resolution: 16 bits (0.001% FS)
  • Surge Protection: 4000 V DC
  • Power: 3.6~12 V DC ±10%, 20mA
  • Protection: polarity, overload, short circuit
  • Safety: CE, FCC

Typical Applications

  • Drinking water, surface water, industry, water treatment, wastewater

Measurement Method

  • The analyzer consists of a light source, a sample cell, and a light detector (photo detector). Incident light is absorbed by the sample, and the light is measured by the detector. The value depends on the amount of absorbance in the sample. The transmitter uses a long life LED and the 180° light method in accordance with International standard to assure accurate measurement values. An automated mechanical wiper is to remain surface clean and remove air bubbles of the optical window in order to maximize the accuracy and minimize the maintenance requirement.

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