Aquas INC.

- Model SMR21 Series - Nitrate Analyzer

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Nitrate Analyzer is connected directly via RS485 communication interface, providing simple, reliable, cost-saving process data with remote monitoring, calibration, configuration and diagnostics capabilities. Nitrate Meter housing in a robust IP68 proof enclosure, 1500 N tensile strength Kevlar reinforced cable, up to 1.2 km digital data transmission, the NO3-N analyzer and NO3-N 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
  • Optional Auto Cleaning Wiper, Almost No Maintenance
  • No Inlet Water Alarm Output
  • Onboard memory allowing users to easily calibrate and configure sensor at lab and distribute to various fields sites

  • Type : Optical
  • Measurement range :
    • SMR21-4: 0~2 mg/L (50 mm)
    • SMR21-5: 0~5 mg/L (20 mm)
    • SMR21-6: 0~10 mg/L (10 mm)
    • SMR21-7: 0~20 mg/L (5 mm)
    • SMR21-8: 0~50 mg/L (2 mm)
    • SMR21-9: 0~100 mg/L (1 mm)
  • Accuracy : ±5% in standard solution
  • Resolution : 0.01 mg/L
  • Repeatability : ±3% in standard solution
  • Light Source : Xenon flash lamp
  • Beam Angle : 180°
  • Light Path Length : 1, 2, 5, 10, 50 mm
  • Process flow rate : 0.1~10 m/s
  • Operating pressure : Max. 5 Kgf/cm2
  • Operating Temperature : 0~85 °C
  • Response time : 30 secs
  • Protection : IP68
  • Housing : SS316L; Titanium
  • Turbidity (or total suspended solids) measurement range :
    • SMR21-1: 0~50 NTU (or 0~100 mg/L)
    • SMR21-2: 0~500 NTU ( or 0~1,000 mg/L)
    • SMR21-3: 0~1,000 NTU ( or 0~2,000 mg/L)
    • SMR21-4: 0~2,000 NTU ( or 0~4,000 mg/L)
    • SMR21-5: 0~4,000 NTU ( or 0~10,000 mg/L)
  • Dimension : Φ 75 x 416 mm
  • Weight : analyzer: approx. 5 Kg (SS316L); 3.5 Kg (Titanium)
  • cable: 80 g/m

  • Drinking water, water treatment, wastewater, fishery

  • 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: 12 V DC ±10%, 0.5 A
  • Protection: polarity, overload, short circuit
  • Safety: CE, FCC

Typical Applications

  • Drinking water, water treatment, wastewater, fishery

Measurement Method

  • The Xenon flash lamp emits UV-Vis light passing through the sample to be analysed. The spectrometer resolve the wavelength into high resolution spectrum with advanced algorithms to provide the concentration and eliminates mutual interferences such as chemicals, turbidity and color.

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