SMR23 Ammonium Analyzer (RS485)

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.

Advantages:
■ Robust IP68 Water Submersible Enclosure, Solution Without Cabinet
■ On-line Realtime Measurement
■ Ultra Low Power Consumption, Ideal for Outdoor Applications
■ Temperature, pH and Potassium Compensation
■ 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
■ Onboard memory allowing users to easily calibrate and configure sensor at lab and distribute
to various fields sites

General

■ 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.