Free Available Chlorine Analyzer (Non-reagent Type) FC500G

FC500G non-reagent free available chlorine analyzer adopts the polarographic method, using a rotating electrode to continuously measure online the concentration of free available chlorine.

The FC500G is intended for measurements in the water distribution network, at pumping stations, water delivery points, schools, and public facilities.


  • Measuring range can be selected from 0 to 1/0 to 2/0 to 3mg/l and 0 to 5/0 to 10 mg/l.
  • Rotating electrode/ceramic bead cleaning has been improved to making cleaning automatic and continuous.
  • Easy-to-maintain (-clean) cell construction.


Measured Object Free chlorine in tap water
Measuring System Polarographic method using rotating electrode
Measuring Range Any of 0 to 1/0 to 2/0 to 3 mg/l and 0 to 5/0 to 10 mg/l certainly, use to air purge
Output Signal 4 to 20mA DC (load resistance: Maximum 550 Ω)
Sample Solution Condition Temperature: 0 to 40℃
pH: 6.5 to 7.5
Flow Rate: 0.1 to 2.5 l/min (at cell inlet)
Pressure: 1 to 30 kPa (without VALVE)
              1 to 150 kPa (with VALVE)
Conductivity: 100 to 300 μS/cm
SS (Suspended Solid): 10 mg/l or less
Electrode Indicating electrode: Rotating gold electrode
Reference electrode: Silver electrode (with Pt1000 RTD installed)
Electrode Cleaning Ceramic bead cleaning
Ambient Temperature -10 to 50℃
Installation Indoor
Power Supply 100 V AC/110 V AC / 200 V AC/220 V AC ±10 %, 50/60 Hz
Weight Approx. 6.5 kg


Linearity ±5 % of full scale
Repeatability 2 % of full scale
Stability Zero drift; ±1 % of full scale/month or less
Span drift; -10 % of full scale/month or less
Response time Approx. 2 min (90 % response time)

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