The RC400G residual chlorine analyzer employs a polarographic system that uses rotating platinum electrodes to provide continuous online measurement of residual chlorine concentration. By appropriate use of reagents, it is possible to separate residual chlorine (free chlorine + combined-chlorine) from free chlorine for measurement.
The RC400G is an intelligent residual chlorine analyzer that makes extensive use of microprocessors. Its design is based on the know-how gained through Yokogawa's many years of experience with residual chlorine analysis.
Features
- Simple, one-touch calibration. Automatic sensor self-diagnostics (zero point, slope, response) during calibration.
- Output range can be set in the field in case when the span is 1 mg/l or more. Remote switching 2-range capability is available.
- Line-segment function available for output signal.
- Simple verification of applied voltage/current characteristics (Plateau characteristic) between electrodes. Allows detailed knowledge of sensor characteristics for the target application to be obtained.
- Improvements to rotating electrodes and glass bead cleaning have been added for even more effective automatic continuous cleaning.
- Waterjet cleaning can be applied for the purpose of particularly dirty applications.
- Easily maintained (easy-to-clean) cell construction.
- Available for special version (for free chlorine measurement) designed to cope with very high concentrations of combined chlorine.
Specifications
| Measurement object | Free chlorine or residual chlorine (total chlorine) in water |
| Measurement method | Rotating electrode type polarographic system |
| Measurement range | 0 to 10 mg/l (mg/l used as concentration units per JIS K0101 and municipal water test methods) |
| Output range | Can be freely set within ranges with spans of 1 mg/l or greater |
| Output signal | 4 to 20 mA DC (load resistance, 550 Ω Max.) or 1 to 5 V DC (output resistance, 300 Ω Max.) |
| Sample conditions | Temperature: 0 to 50℃ pH: 3 to 9 Flow: 1 to 4 l /min, for pure water or municipal water application. 5 to 10 l /min, for raw water or sea water application. 10 to 20 l /min, for secondary sewage treatment application. Pressure: 20 to 500 kPa |
| Electrodes | Measuring electrode: Rotating platinum electrode Reference electrode: Platinum electrode (built-in Pt1000 Ω RTD) |
| Ambient Temperature | -5 to 55℃ |
| Ambient Humidity | 5 to 95 % RH (non-condensing) |
| Installation | Indoors (A separate rainproof cover is required for outdoor installation. Avoid direct sunlight.) |
| Power Supply | 100/110/220 V AC ±10 %, 50/60 Hz |
| Weight | Approx. 65 kg (for pure water) |
Performance
(Percent display is computed with respect to whichever of output range 1 or output range 2 has the highest upper range value)
| Linearity | ±3 % |
| Repeatability | 2 % |
| Drift | Zero drift: ±1 %/month Max. Span drift: -5 %/month Max. |
| Response time | Displayed as 90 % response time For pure water: Approx. 2 min For raw water (1-cylinder): Approx. 4 min For raw water (2-cylinder): Approx. 4 min |
Downloads
Brochures
Instruction Manuals
General Specifications
Drawings
- *Discontinued: RC400G-1 Residual Chlorine Analyzer (for pure water) (297 KB)
- *Discontinued: RC400G-2 Residual Chlorine Analyzer (for raw water with one cylinder sand filter) (322 KB)
- *Discontinued: Residual Chlorine Analyzer (for raw water with two cylinder sand filter) (343 KB)
- RC401G-C Reagent Preparation Tank (43 KB)
- RC401G-A Reagent Tank (86 KB)
- RC401G-B Reagent Tank with Stand (36 KB)
MSDS/SDS
- K9044FX / Conductive silicone grease (99 KB)
- K9041RA / Lubricating oil (221 KB)
- K9088PE / Polishing powder (Alumina) (166 KB)
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