Detcon CXT-DM - Manual (Page 6)

Model CXT-DM
Figure 2 Construction of Electrochemical Toxic Sensor
The O
2
deficiency sensor technology is a two electrode galvanic metal air battery type cell, which is housed as
a field replaceable intelligent plug–in sensor. The cell is diffusion limited and functions as a direct current
generator proportional to the amount of oxygen adsorption. The sensors are temperature compensated and
show good accuracy and stability over the operating temperature range of –20° to +50°C (-4° to +122°
Fahrenheit). The sensor is warranted for two years and has an expected service life of up to 2.5 years in
ambient air at 20.9% oxygen.
Figure 3 Construction of Galvanic Cell
1.2 Modular Design
The Model CXT-DM Sensor Assembly is completely modular and is made up of four parts (See Figure 4 for
Assembly Breakaway):
1) CXT-DM Intelligent Transmitter Module (ITM)
2) Plug-in Electrochemical Sensor (varies by gas type and range)
3) CXT Series Bottom Housing
4) Splash Guard.
CXT-DM Instruction Manual Rev. 1.6 Page 2 of 52