Organic Analyzer
CDOM Analyzer

SMR38 Series

Colored Dissolved Organic Analyzer

Colored Dissolved Organic Analyzer is connected directly via RS485 communication interface, providing simple, reliable, cost- saving process data with remote monitoring, calibration, configuration and diagnostics capabilities. The CDOM Meter and fDOM Meter housing in a robust IP68 proof enclosure, 1500 N tensile strength Kevlar reinforced cable, up to 1.2 km digital data transmission, CDOM Analyzer and fDOM Analyzer is ideally used in water/wastewater industry.
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DM (3.0 MB)
  • All-in-One Compact Housing, Built-in Transmitter and Sensors
  • Robust IP68 Water Submersible Protection, Directly Installed in the Field, No Cabinet Required
  • Plug & Play, On-line Realtime Measurement
  • Ultra Low Power Consumption, Ideal for Outdoor Applications
  • 1500 N Tensible Strength Kevlar Reinforced Cable
  • Surge Protection for Power and RS485 Communication
  • RS485 Digital Communication, Minimize Cabling and Engineering Cost
  • Standard Modbus RTU Protocol, Direct Connected with PLC, HMI
  • Sapphire Glass Windows to Prevent Scratch
  • Innovative Nano Coating to Remain Window Clean
  • Auto Cleaning Wiper, Less Maintenance
  • Onboard Memory Allowing Users Easily Calibrate and Configure Sensor at Lab and Distribute to Various Fields and Sites
  • AQCFG Software Tool for Data Monitoring, Calibration, Configuration and Diagnosis
  • IECEx/ATEX Ex ia IIB T5 Ga Explosive Proof Certification
Surface water
Measurement Method
It is based on fluorescent optical technology. A fluorometer generates the wavelength of light required to excite the analyte of interest, it selectively transmits the wavelength of light emitted, then it measures the intensity of the emitted light. The emitted light is proportional to the concentration of the analyte being measured


SMR38 Colored Dissolved Organic Matter Analyzer (CDOM/fDOM) Analyzer 
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 VDC
Power 5~12 VDC, 300 mA
Protection Polarity, Overload, Short circuit
Safety CE, FCC
Measurement Method Fluorescence
Measurement Rang 0~3,000 ppb (μg/L)
Accuracy Linearity R²2 > 0.999 for serial dilution of Quinine Sulfate solution equivalents in 0.1 N H2SO4 at concentrations ranging from 0~300 μg QL L-1
Resolution 0.01 μg/L
Repeatability ±1% FS
Light source LED 355 nm
Operation pressure Max. 10 Kgf/cm²
Operating temperature 0~50 °C
Process flow rate Max. 3 m/s
Response time 3 secs
Protection IP68
Connection 3/4”-14 PT; 5-pin M12 plug
Housing SS316L; Titanium
Dimension Φ 34 x 226 mm 
Weight   analyzer: approx. 500 g ; cable: 80 g/m