Campbell Scientific CS106 Barometer - Manual (Page 15)

CS106 Barometric Pressure Sensor
for mounting the CS106, and hardware for mounting the ENC100 to a tripod,
tower, or pole.
FIGURE 7-2. ENC100 is a very small enclosure that can house one
CS106
Remember that for the sensor to detect the external ambient pressure, the
enclosure must vent to the atmosphere (i.e., not be “hermetically sealed”).
Enclosures purchased from Campbell Scientific properly vent to the
atmosphere.
For user-supplied enclosures, it may be necessary to make a vent
hole on the outer wall. In this situation, do not make the hole on
one of the vertical side walls, as wind blowing around it can cause
transient changes in pressure.
The mounting holes for the sensor are one-inch-centered (three inches apart),
and will mount directly onto the holes on the backplate of Campbell Scientific
enclosures. Mount the sensor with the pneumatic connector pointing vertically
downwards to prevent condensation collecting in the pressure cavity, and also
to ensure that water cannot enter the sensor.
NOTE
7