Basic Water Quality Analyzer
Dissolved Oxygen Meter

SMR09 series

Dissolved Oxygen Analyzer

Dissolved Oxygen Analyzer is connected directly via RS485 communication interface, providing simple, reliable, cost- saving process data with remote monitoring, calibration, configuration and diagnostics capabilities.
The Dissolved Oxygen Meter housing in a robust IP68 proof enclosure, 1500 N tensile strength Kevlar reinforced cable, up to 1.2 km digital data transmission, the Optical DO 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
  • Temperature 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
  • Optional Auto Cleaning Wiper, Almost No Maintenance
  • Onboard memory allowing users to easily calibrate and configure sensor at lab and distribute to various fields sites
SMR09 Dissolved Oxygen Analyzer 
Measurement range 0~20 ppm (mg/L) (0~200 %)
Accuracy 0.1 mg/L (0~8 mg/L)
0.2 mg/L (8~20 mg/L)
Resolution 0.01 mg/L
Repeatability ±0.5% FS
Light source LED 495 nm
Operation pressure 5 Kgf/cm2
Operating temperature 0~50 °C
Process flow rate Min. 0.1 m/s
Response time 1 sec
Protection IP68
Temperature sensor NTC10K
Temperature measurement range 0~50°C
Temperature accuracy ±0.5 °C
Housing SS316L; Titanium
Dimension Φ 16x101 mm
Φ 39Χ310 mm (with wiper)
Weight analyzer: approx. 600 g (SS316L); approx. 400 g (Titanium)
cable: 80 g/m
Typical Application
Drinking water, surface water, groundwater, 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%, 5 mA
  • Protection: polarity, overload, short circuit
  • Safety: CE, FCC
Typical Applications 
  • Drinking water, surface water, groundwater, industry, water treatment, wastewater
Measurement Method 
  • It is based on fluorescent optical technology approved by the ASTM international Method D888-05.        Without calibration requirements and oxygen consumption, this lechnology allows measurement in all situations, especially in very low oxygen concentrations environment.
Standard cable length is 3 m, customized length is available upon request