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Recording CH4 meter for underground use in coal mines

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Summary

A description is given of a recording instrument for the determination of CH4 in mine air for use underground. The operation of this instrument is based on the thermal conductivity principle. The range is 0–2% CH4 in air. The accuracy is better than 0.1% CH4. The apparatus is flameproof and is fed by a compressed-air dynamo whose voltage is stabilized and rectified. Compressed air is used for aspirating the mine air and as comparison gas.

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References

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Author information

Correspondence to W. A. Le Rütte.

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Le Rütte, W.A., Weeda, W. & Maas, W. Recording CH4 meter for underground use in coal mines. Appl. sci. Res. 6, 67–81 (1956). https://doi.org/10.1007/BF03184689

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Keywords

  • Coal Mine
  • Incandescent Lamp
  • Recording Instrument
  • Feed Source
  • Wiring Diagram