Organic Analyzer
COD Analyzer

SMR44 Series

Chemical Oxygen Demand Analyzer

Chemical Oxygen Demand Analyzer is connected directly via RS485 communication interface, providing simple, reliable, cost- saving process data with remote monitoring, calibration, configuration and diagnostics capabilities. The Chemical Oxygen Demand Meter housing in a robust IP68 proof enclosure, 1500 N tensile strength Kevlar reinforced cable, up to 1.2 km digital data transmission,COD meter and COD Analyzer is ideally used in water/wastewater industry.
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DM (7.2 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 Tensile 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
  • Dual Beam Light and Temperature Compensation
  • Suspended Solids Measurement and Compensation
  • 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
Drinking water, surface water, industry, water treatment, wastewater
Measurement Method
The analyzer consists of an UV 254 nm light source, a sample cell, and a light detector (photo detector). Incident light is absorbed by the sample, and the light is measured by the detector. The value depends on the amount of absorbance in the sample. The transmitter uses a long life LED and the 180° light method in accordance with International standard to assure accurate measurement values. An automated mechanical wiper is to remain surface clean and remove air bubbles of the optical window in order to maximize the accuracy and minimize the maintenance requirement

Submersible, flow through, pipe insertion

SMR44 Chemical Oxygen Demand (COD) 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 400 mA (SMR44-1~4, 6) ; 12 VDC±10%, 500 mA (SMR44-5)
Protection Polarity, Overload, Short circuit
Safety CE, FCC
Measurement range SMR44-1 (20 mm) : 0~100 mg/L ; SMR44-2 (5 mm) : 0~1,000 mg/L ;
SMR44-3 (1 mm) : 0~3,000 mg/L ; SMR44-4 (0.3 mm) : 0~7,000 mg/L ;
SMR44-5 (1 mm) : 0~30,000 mg/L;SMR44-6 (50 mm) : 0~50 mg/L
Accuracy ±5% in standard solution(0~15,000 mg/L); ±10% in standard solution(15,000~30,000 mg/L)
Resolution 0.01 mg/L
Repeatability ±3% in standard solution
Light source LED 254 nm(SMR44-1~5) ; Xenon flash lamp(SMR44-6)
Beam angle 180°
Light path length 0.3, 1, 5 , 20 mm
Process flow rate Max.3  m/s
Operation pressure Max.10 Kgf/cm2
Operating temperature 0~50 °C
Response time 3 secs
Protection IP68
Connection 1”-11 PT; 5-pin M16 plug
Housing SS316L; Titanium
Dimension SMR44-1: ø 50Χ305 mm ; SMR44-2: ø 50Χ290 mm ; SMR44-3: ø 50Χ287 mm ; SMR44-4: ø 50Χ286 mm ; SMR44-5: ø 68Χ443 mm ; SMR44-6: ø 50Χ335 mm
Weight analyzer: approx. 1 Kg; (SS316L); 0.8 Kg (Titanium); Cable: 80 g/m
Suspended Solids
Measurement range SMR44-1 (0~100 mg/L) ; SMR44-2 (0~1,000 mg/L) ; SMR44-3 (0~3,000 mg/L) ; SMR44-4 (0~7,000 mg/L) ; SMR44-5 (0~30,000 mg/L) ; SMR44-6 (0~50 mg/L)
Accuracy ±5% measured value
Resolution 0.01 mg/L
Repeatability ±3% measured value