Aquas - Model SMR03 Series -Free Chlorine Analyzer

• Robust IP68 Water Submersible Enclosure, Solution Without Cabinet
• On-line Realtime Measurement
• Ultra Low Power Consumption, Ideal for Outdoor Applications
• Temperature Compensation
• No Moving Parts, 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
• Auto Cleaning, Almost No Maintenance
• No Reagent and Membrane, Almost No Consumable
• Not Affected by Pressure Fluctuation(1~15kg f/cm2)
• pH Compensation (pH 5-9)
• Built-in Flow Regulator and Flow Indicator
• Integration Additional Sensors such as Conductivity or ORP
• Onboard memory allowing users to easily calibrate and configure sensor at lab and distribute to various fields sites

• Measurement range : 0~2 mg/L
• Accuracy : 0.01 ppm (0~0.5 ppm)
• 0.02 ppm (0.5~2 ppm)
• Resolution : 0.01 mg/L
• Repeatability : ±1% FS
• Temperature compensation : 0~85 °C
• Automatic pH compensation : 5-9 pH (SMR03-2)
• First setup time : 4 hours
• Process flow rate : Min. 0.8 l/min
• Auto cleaning : rotating glass ball
• Electrode material : platinum (cathode), copper (anode)
• Operating pressure : 0~10 Kgf/cm2
• Operating temperature : 0~85 °C
• Response time : 3 secs
• Protection : IP68
• Housing : Acrylic
• pH Sensor : 
• Measurement range : 0 ~14 pH
• Accuracy : ±0.05 pH
• Resolution : 0.01 pH
• Repeatability : ±0.1% FS
• Temperature Sensor : pt1000
• Measurement range : 0 ~ 85 °C
• Accuracy : ±0.5°C; ±0.1°C (optional)
• ORP Sensor : 
• Measurement range : -1,000~1,000 mV
• Accuracy : ±5 mV
• Resolution : 0.1 mV
• Repeatability : ±0.5 mV
• Conductivity Sensor : 
• Measurement range : 0~5 mS/cm
• Accuracy  : ±1% FS +1 μS/cm
• Resolution : 0.1 μS/cm
• Repeatability : ±0.5% FS
• Operating pressure : Max. 10 Kgf/cm²
• Operating temperature : 0~85 °C
• Process flow rate : 0.1l /min
• Response time : 1 sec
• Dimension : 350(W)x320(H)x155(D) mm
• Weight : Free chlorine and pH analyzer: approx. 1.5 Kg
• cable: 80 g/m

Drinking water, stormwater groundwater, industry, water treatment, wastewater, gas petrochemical

• 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: input: DC 3.6~5 V, 20 mA
• Protection: polarity, overload, short circuit
• Safety: CE, FCC

Measurement Method

• SMR03-1: The free chlorine contained in the medium diffuses through the membrane and is reduced atcathode. The current is proportional to the free chlorine concentration.
• SMR03-2: The amperometric electrode measurement cell consists of two combination probes that uses a platinum anode and a copper cathode electrode to amperometrically measure free residual chlorine, There is no need for chemical reagents, and the glass balls inside rotates continuously to remove the hydrogen gas from the electrodes. An electrochemical reaction occurs within these electrodes, based on the available chlorine concentration, generating a propotional current. No reagen and membrane, not affected by pressure and flow velocity, auto cleaning and is able to install conductivity and ORP electrode.