SMR21 series
Nitrate Analyzer
Description
Products
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Nutrients Analyzer
Features
- All-in-One Compact Housing, Built-in Transmitter and Sensors
- Robust IP68 Water Submersible Protection
- Plug & Play, On- line Realtime Measurement
- Ultra Low Power Consumption, Ideal for Outdoor Applications
- 1500 N Tensile Strength Kevlar Reinforced Cable
- Temperature and Chloride Compensation(SMR21-2)
- Surge Protection for Power and RS485 Communication
- RS485 Digital Communication, Minimize Cabling and Engineering Cost
- Standard Modbus RTU Protocol, Direct Connected with PLC, HMI
- Software Tool for Data Monitoring, Calibration , Configuration and Diagnosis
- Very Stable Electrodes, without the Need of Frequent Calibration(SMR21-2)
- Metal Membrane of Electrode to Prevent Scratch(SMR21-2)
- Electrode is over 12 Months Long Period of Life(SMR21-2)
- Sapphire Glass Windows to Prevent Scratch(SMR21-4~7)
- Innovative Nano Coating to Remain Window Clean(SMR21-4~7)
- Auto Cleaning Wiper, Less Maintenance
- Chemical Oxygen Demand (COD) and Suspended Solids Compensation(SMR21-4~7)
- Onboard Memory Allowing Users Easily Calibrate and Configure Sensor at Lab and Distribute to Various Fields Sites
- AQCFG Software Tool for Data Monitoring, Calibration , Configuration and Diagnosis
Applications
Drinking water, water treatment, wastewater, fishery
Specifications
- Output Signal: RS485 (Modbus RTU protocol), 19,200 bps, 8 data bits, no parity, 1 stop bit; 4~20 mA
- Data Resolution: 16 bits (0.001% FS)
- Surge Protection: 4000 V DC
- Power:12 V DC, 300 mA (SMR21-2); 12 V DC, 500 mA (SMR21-4~7)
- Protection: polarity, overload, short circuit
- Safety: CE, FCC
SMR21-2: The ion selective electrode continuous measurement of nitrate is carried out with specific membrane that is selective of nitrate. 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.
SMR21-4~7: 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 organic chemicals, turbidity and color.
SMR21-2 Nitrate Analyzer
| Type | Ion selective electrode |
| Measurement range | 0.1~100/1,000 mg/L, auto range |
| Accuracy | ±5% in standard solution |
| Resolution | 0.01 mg/L |
| Repeatability | ±3% in standard solution |
| Operation pH | pH 4~11 |
| Operating pressure | Max. 0.2 Kgf/cm² |
| Operating Temperature | 0 ~ 40 °C |
| Process Flow Rate | 0.1~4 m/s |
| Response time | 2 min (90%) |
| Protection | IP68 |
| Temperature | |
| Sensor | Pt1000 |
| Measurement range | 0~40 °C |
| Accuracy | ±0.1 °C |
| Resolution | 0.01 °C |
| Repeatability | 0.1 °C |
| Chloride | |
| Measurement range | 0.1~1,000 mg/L |
| Accuracy | ±5% measured valie ±0.5 mg/L |
| Resolution | 0.01 mg/L |
| Repeatability | ±3% measured valie ±0.5 mg/L |
| Connection | 1”-11 PT, 5-pin M16 plug |
| Housing | POM |
| Dimension | Φ 47 x 279 mm |
| Weight | Nitrate analyzer: approx. 1.5 Kg cable: 80 g/m |
| Type | Optical |
| Measurement range | SMR21-4: 0~5 mg/L (20 mm)(suspended solids< 200 mg/L) SMR21-5: 0~20 mg/L (5 mm)(suspended solids< 1,000 mg/L) SMR21-6: 0~100 mg/L (1 mm)(suspended solids< 5,000 mg/L) SMR21-7: 0~300 mg/L (0.3 mm)(suspended solids< 5,000 mg/L) |
| 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, 5, 20 mm |
| Process Flow Rate | Max. 3 m/s |
| Operating pressure | Max. 10 Kgf/cm² |
| Operating Temperature | 0 ~ 50 °C |
| Response time | 10 secs |
| Protection | IP68 |
| Connection | 5-pin M12 plug |
| Housing | Titanium |
| Dimension | Φ 75 x 416 mm |
| Weight | analyzer: approx. 3.5 Kg cable: 80 g/m |
