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SILAREX - TOC is a high-end infrared gas detection module, which use for Water TOC measurement, that uses the non-dispersive infrared detection technology NDIR to simultaneously detect up to 3 different ranges of carbon dioxide gase, where each range has it‘s own accuracy. The optical structure of the module is designed to be simple, with a robust mechanical structure for easy integration and digital signal processing by a microprocessor. It also integrates temperature and pressure compensation sensors to effectively compensate for detection of interfering signals to achieve high accuracy and stability detection.
Type :
SILAREX - TOCTotal Organic Carbon (TOC) is the amount of carbon in organic compounds and is often used as a non-specific indicator of water quality or cleanliness in pharmaceutical manufacturing facilities. TOC is classified as a rapid and accurate method of assessing the potential contamination of wastewater, replacing traditional, but lengthy, methods such as Biochemical Oxygen Demand (BOD), and Chemical Oxygen Demand (COD) testing.
With the continuous construction and commissioning of high-parameter and large-capacity thermal power generating units, higher requirements have been put forward for the quality of water vapour in the boiler, of which the control of TOC has become an important indicator. The water vapour standards of foreign thermal power units have strict regulations, for example, in Europe, TOC has been widely implemented as a general requirement for monitoring parameters.
The Non-Dispersive Infrared Analysis (NDIR) method provides the only viable anti-interference method for detecting CO2 in TOC analysis. The main advantage of using NDIR is that it directly and accurately measures CO2 from the oxidation of organic carbon in an oxidation reactor without relying on the measurement of secondary correction effects, as used in conductivity measurements.
The NDIR detector utilizes a flow-through gas chamber technique, with a constant flow of oxides into and out of the detector. An infrared light absorption peak around 4.26µm (2350cm-1) specific to CO2 is typically used and the gas absorption of this peak is measured through the detector. As the gas continues to flow into and out of the detector unit, the cumulative value of the test results forms a waveform by integrating and correlating the overall CO2 concentration value in the sample, which is special good for the Water TOC measurement.
Detected gases and ranges:
Carbon dioxide CO2
|
Range |
Linerity Error |
Detction Limit |
|
0 - 100 ppm |
±2ppm |
0.15ppm |
|
0 - 1000 ppm |
±20PPM |
0.4ppm |
|
0 - 10000 ppm |
±100PPM |
8ppm |
|
Output |
|
|
|
0-10000ppm |
0-100ppm/±2ppm 100-1000ppm/±20ppm 1000-10000ppm ±100ppm |
0.15ppm |
Product Advantages:
Specification:
|
Detection Principle |
NDIR (Quad Beam) |
|
Measuring Range |
See List |
|
Gas Supply |
Flow |
|
Dimensions |
See Mechanical Data |
|
Hose connection |
3mm internal, 5mm outside |
|
Heated Tem. |
Internal 42°C |
|
Response time (T90) |
< 8sec @0.7 l/min (default) |
|
Repeatability |
≤ ±1 % FS |
|
Linearity Error |
≤ ±1 % FS ( or ≤ ±1.5 % FS depend on version) |
|
Stability |
< ±2% [FS] @1000h |
|
Operating Temp |
0 °C up to 40 °C |
|
Storage Temp |
-20 °C up to 60 °C |
|
Ambient Humidity |
0 % up to 95 % rel. Humidity (Non-condensing) |
|
Ambient Air Pressure |
800 ... 1150 mbar |
|
Warm up Time |
< 2 minutes (Cold start) < 30 minutes according to heat isolation and environment Tem. |
|
Flow |
0,2up to 1,0 L / min (const flow) |
|
Gas Inlet Tem. |
2 ... +42°C |
|
Diginal Output Signal |
Modbus ASCII RTU TTL |
|
Operation power |
24 VDC ±0.3V |
|
Driven Current |
240mA / max 1.5A during Heating |
|
Power Consumption |
< 800 mW / max 36W during Heating |
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