10 Definition of Terms
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9-2. Detection principle
A negative electrode of noble metal and a positive electrode of lead are placed in a resin container filled
with electrolyte. A part of the container is opened and covered with a barrier. The negative electrode is
installed in contact with the barrier. Lead wires are drawn from the positive and negative electrodes to
obtain outputs. A thermistor is connected between the lead wires to perform temperature compensation for
the sensor outputs.
10
10
Definition of Terms
Galvanic cell type
This is a principle of the sensor installed in the detector head.
See "9-2. Detection principle" for details.
vol%
A unit used to express the percentage of a specific substance (or gas) in a
volume of solution.
Atmosphere
An atmosphere with a temperature within the range of -10 to 40°C and a
humidity of 95% RH or less at one atmospheric pressure (1013 hPa).
Full scale
Maximum value of the detection range.
Calibration
Adjusts the readings to the calibration gas concentration value by using the
calibration gas.
Barrier
Electrolyte
Container
Lead wire
Thermistor
Output
Positive
electrode
Negative
electrode
