Organic Pollutants 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.
  • Robust IP68 Water Submersible Enclosure, Solution Without Cabinet
  • On-line Realtime Measurement
  • Ultra Low Power Consumption, Ideal for Outdoor Applications
  • 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
  • Sapphire Glass Windows to Prevent Scratch
  • Innovative Nano Coating to Remain Window Clean
  • 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
SMR44 Chemical Oxygen Demand (COD) Analyzer 
Measurement range SMR44-1: 0~100 mg/L (20 mm)
SMR44-2: 0~800 mg/L (5 mm)
SMR44-3: 0~2,500 mg/L (2 mm)
SMR44-4: 0~5,000 mg/L (1 mm)
SMR44-5: 0~30,000 mg/L (1 mm)
Accuracy ±3% in standard solution
Resolution 0.01 mg/L
Repeatability ±1% in standard solution
Light source LED 254 nm
Beam angle 180°
Light path length 1, 2 , 5 , 10, 50 , 100 mm
Process flow rate 0.1~10 m/s
Operation pressure Max.5 Kgf/cm2
Operating temperature 0~45 °C
Response time 3 secs
Protection IP68
Turbidity measurement range SMR44-1: 0~100 NTU (or 0~200 mg/L)
SMR44-2: 0~500 NTU (or 0~1,000 mg/L)
SMR44-3: 0~1,000 NTU (or 0~2,000 mg/L)
SMR44-4: 0~2,000 NTU (or 0~5,000 mg/L)
SMR44-5: 0~2,000 NTU (or 0~5,000 mg/L)
Turbidity accuracy ±5%FS
Housing SS316L; Titanium
Dimension Φ39Χ320 mm;Φ68Χ443 mm
Weight analyzer: approx. 1 Kg (SS316L); approx. 0.7 Kg (Titanium) Cable: 80g/m
Typical Application
Drinking water, surface water, 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%, 45 mA (SMR44-1~4); 12 V DC ±10%, 0.5 A (SMR44-5)
  • Protection: polarity, overload, short circuit
  • Safety: CE, FCC
Typical Applications
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. Optionals 
PRO Wireless Controller
ECO Wireless Logger
ARK Water Quality Monitoring Buoy
FLO Open Channel Flow Meter
HMI Multiparameter Controller
PAD IP67 Handheld Meter
SFC Flow Chamber
CAB06 Configuration cable (1.5 m, USB interface)
CAB12 2 ports RS485 cable
CAB16 4 ports RS485 cable
PIM02 Pipe mounting
SAO01 Analog output module(4~20 mA, 1 channel)

Standard cable length is 3 m, customized length is available upon request