Aquas INC.

- Model SMR23 Series - Ammonium Analyzer

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Ammonium Analyzer is connected directly via RS485 communication interface, providing simple, reliable, cost- saving process data with remote monitoring, calibration, configuration and diagnostics capabilities. The Ammonium Meter housing in a robust IP68 proof enclosure, 1500 N tensile strength Kevlar reinforced cable, up to 1.2 km digital data transmission, the NH4-N Analyzer 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
  • Temperature, pH and Potassium Compensation
  • Surge Protection for Power and RS485 Communication
  • 1.2 Km RS485 Digital Communication, Minimize Cabling and Engineering Cost
  • Software Configuration Calibration and Data Monitoring
  • Onboard memory allowing users to easily calibrate and configure sensor at lab and distribute to various fields sites
  • Standard Modbus RTU Protocol, Direct Connected with PLC, HMI, Eliminate I/O Module Cost

  • Type : Ion selective electrode
  • Measurement range : 0~1000 mg/L
  • Accuracy : ±5% in standard solution
  • Resolution : 0.01 mg/L
  • Repeatability : ±5% in standard solution
  • Operating pressure : Max. 3 Kgf/cm2
  • Operating Temperature : 0 ~ 50 °C
  • Process Flow Rate : 0.1~10 m/s
  • Response time : <2 min (90%)
  • Protection : IP68
  • Temperature sensor : Pt100
  • Temperature measurement range : 0~50 °C
  • Temperature accuracy : ±0.5 °C; ±0.1 °C (optional)
  • Potassium Sensor : 
  • Measurement range : 0~1,000 mg/L
  • Accuracy : ±5% of reading ±0.2 mg/L
  • Resolution : 0.01 mg/L
  • Repeatability : ±5% of reading ±0.2 mg/L
  • pH Sensor : 
  • Measurement range : 0~14 PH
  • Accuracy : ±0.05 PH
  • Resolution : 0.01 PH
  • Repeatability : ±0.02 PH
  • Process connection : M26 x 1.5
  • Housing : POM
  • Dimension : Ammonium analyzer: Φ 38.5x318 mm
  • Ammonium and potassium analyzer: Φ 80x383 mm
  • Weight : Ammonium analyzer: approx. 180 g;
  • Ammonium and potassium analyzer: approx. 450 g; cable: 80 g/m
  • cable: 80 g/m

  • 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%, 20 mA(SMR23-1); 60 mA(SMR23-2)
  • Protection: polarity, overload, short circuit
  • Safety: CE, FCC

Typical Applications

  • Drinking water, water treatment, wastewater, fishery

Measurement Method

  • The ion selective electrode continuous measurement of nitrate is carried out with specific membrane that is selective of ammoniumion. That membrane creates charge seperation between the water surrounded electrode and internal filling solution. The charge is measured as a voltage that changes the concentration in the water adjacent the membrane. Compared with the traditional colorimetric method, there are many advantages such as fast response time, more accurate, easier and no reagents used.

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