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Archigas - Model TCD3000 SiA - Gas ...

Archigas - Model TCD3000 SiA -Gas Analyzers for Hydrogen and Helium Detection

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The TCD3000 SiA version is predestined for hydrogen detection in areas that require ATEX certification. The compact and robust gas analyser with the specifications II 2 G Ex db IIC T4/T3 Gb, -40°C < Ta < +90°C / 125°C for ATEX ZONE 1 is ideal for the precise, fast and sensitive measurement of quasi-binary gas mixtures. The measurement is based on the principle of thermal conductivity (TCD = Thermal Conductivity Detector). This technology is ideal for measuring gases with very different thermal conductivities, such as H₂ and O₂.

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Outstanding precision and speed in hydrogen concentration measurement: The gas analysers are characterized by an industry-leading response time of < 30 ms and a measuring range from a few ppm to 100 vol.%, specially developed for the new requirements of hydrogen infrastructure in the energy and process industries.
Unrivalled robustness for demanding environments: Optimised for use in humid environments, the devices withstand condensate and water without damage and provides precise measurements up to a pressure of 200 bar – ideal for electrolysers, fuel cells and other hydrogen applications.
Maximum safety, minimum maintenance: The TCD3000 SiA and TCD3000 Si significantly increase occupational safety through fast and reliable explosion level monitoring. The devices represent a long-term investment with an expected service life of up to 10 years.
Adaptability meets economy: The screw-in and extremely compact gas analysers save space and costs. Thanks to them, a wide variety of gas mixtures can be measured without additional sample preparation – a highly efficient solution that outperforms the competition in terms of performance and price.

SiA Dimensions with connectors; Weight - H: 96 mm; Ø: 45 mm; 740 g
Si Dimensions with connectors; Weight - H: 91 mm; Ø: 45 mm; 440 g
Gas connection - G 1/2″ or NPT 1/2″
Power supply - 24 ±25% VDC, < 5 W
Analog output - 4-20 mA potential-bound, RL ≤ 750 Ω
Serial interface - RS485, baud rate 38400 / data bits 8
Ambient temperature range - -40 to +90 °C
Sample gas temperature - -40 to +90 °C / +125 °C
Reaction time - ≤ 30 ms
T90 time - < 1 s
Warm-up time - < 1 min
Sample gas pressure - 0,9 to 200 bar (absolute)
Sample gas flow - 0 to 10 m/s (higher flow rates on request)
Noise - < 10 ppm
Measured value drift - < 100 ppm / week
Repeatability - < 100 ppm
Temperature influence - < 50 ppm / 10 K
Influence of sample gas pressure at zero point - < 25 ppm / 10 hPa; ab 1 MPa < 2 ppm / 10 hPa
Influence of sample gas pressure with deflection gas - < 100 ppm / 10 hPa; ab 1 MPa < 10 ppm / 10 hPa
Influence of sample gas flow rate at zero point - < 25 ppm / 10 l/h
Influence of sample gas flow rate with deflection gas - < 100 ppm / 10 l/h

Multiple calibrations possible for one sensor : Several linearisation curves, different measuring ranges and other gas pairs can be stored on one device (manual switching)
Pressure compensation : Thermal conductivity is pressure-dependent, therefore a constant pressure must be present during the measurement. If the pressure is not constant, the error can be eliminated by an additional pressure measurement. We can provide a compensation curve on request
Customised settings possible that go beyond the technical specifications : Customised adjustment for e.g. higher gas temperatures, radioactive environments, particularly low flow rates
Higher pressure ranges : Settings for high pressure ranges >200 bar also available on request
Express delivery possible : Depending on capacity and agreement, short-term delivery also possible
Other connections e.g. NPT ½“ : Standard G 1/2‘ – other connections such as NPT 1/2’ on request
Can also be ordered as Si variant without ATEX : For use outside the ATEX protection zone