Weather Housing - Honeywell Apex Technical Handbook

Gas detection system
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MAN0604_Issue 09_02-2013
2110M8030

2.3.4 Weather Housing

Caution:
This accessory should not be used for calibration purposes.
This accessory is not recommended for use in still air conditions.
Part Number: 2110B2150
The Weather Housing accessory protects the sensor from hosing down/ cleaning operations and
from extreme weather conditions, (e.g. torrential rain, storms, gales etc.). Conforms to cSA c22.2
No. 152 when fitted to the Certified Sensor with specific cartridges installed. See specifications
for details.
The weather housing should not be fitted if the operating environment of the sensor does not require
the additional protection afforded. In still air conditions the gas is transported to the face of the sinter
is by diffusion only. Under such conditions the weather protection will slow the rate at which gas can
reach the sensing element and consequently the speed of response of the sensor to gas will
be reduced.
As well as providing weather protection the housing also provides a means to directly inject gas to
the front of the sensor via a 1/4in. O/D nozzle for gas response checking. The recommended flow
rate for response checks is 1 litre per minute. Accuracy of reading is not guaranteed. Do not carry
out response checks at wind speeds greater than 10m/s (22mph).
The accessory is attached to the sensor by means of a bayonet fitting.
Note: The sensor will exhibit an increased reading(or indication) to gas with higher wind speeds.
Fitting the weather housing with the supplied hydrophobic filter will eliminate this effect but
increase the response time.
2. OvERviEW
18
53mm
Apex

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