Snifter mA+ EX RF User Manual 5
Figure 1 Recommended distance to duct bends (D = Duct diameter)
In some applications, a compromise must be made and the sensor will have to be
fitted in a position that satisfies the majority of above requirements. The Snifter
mA+ EX RF must be attached to metal ductwork so that the device will be
electrically shielded from interference and has good ground reference.
1. The unit shall be installed in a position, where the gas flow passes the
sensor rod in a 90° angle.
2. In round cross-section ducts, the unit can be installed in any position above
the horizontal axis (between 9 o’clock and 3 o’clock). See Figure 2
3. For square cross-section ducts, the unit must be positioned in the middle of
the top or in the middle of one of the sides. See Figure 3
4. Although the sensor is not affected by vibration, very high vibration levels
should be avoided.
5. The units must not be installed in direct sunlight or in areas where the
ambient temperature is above +40 °C.
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