BAPI Outside Air Temperature Sensors Catalog Page
Outside Air Temperature Sensors BA/#-O
Installation & Operations
20909_ins_OSA_Passive
Overview
The BA/#-O is for Outside Air mounting and temperature measurement. The probe is made to protect the sensor from
rain, sleet, snow or bird droppings. The BA/#-O is available in multiple thermistor or RTD’s as shown in the specications.
Enclosure mounting styles come in plastic or metal for both NEMA 3R and NEMA 4 applications and are all UV rated.
Identication
rev. 06/29/15
Fig 1: Outside Air Sensor in a BAPI-Box (-BB) Enclosure
Fig 3: Outside Air Sensor in a Weatherproof (-WP) Enclosure
Fig 2: Outside Air Sensor in a BAPI-Box 2 (-BB2) Enclosure
Fig 4: Outside Air Sensor in a Weather Tight (-EU) Enclosure
Specications subject to change without notice.
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Outside Air Temperature Sensors BA/#-O
Installation & Operations
20909_ins_OSA_Passive
Mounting
Fig 5: BAPI-Box (-BB) Enclosure Installation Fig 6: BAPI-Box 2 (-BB2) Enclosure Installation
rev. 06/29/15
Fig 8: Weather Tight (-EU) Enclosure InstallationFig 7: Weatherproof (-WP) Enclosure Installation
Outside Air (OSA) sensor placement is critical to good performance. The OSA sensor must be mounted in the shade
away from building windows, doors or vents. They should never be in direct sunlight or you will have higher than
expected temperature readings by as much as +30%. The ideal shaded location in the Northern hemisphere is on the
North side of the building. In the Southern hemisphere the South side of the building is ideal.
The sensor shield and probe should always point down and mounted between four feet above the ground/roof and one
foot minimum below the eave. (Note: Four feet keeps the sensor above the ground or roof top radiation and one foot
under the eave prevents measurement of trapped heat from under the eave.)
Drill the mounting holes and mount as shown in the gures 5-8. Snug up the mounting screws to ensure that the foam
backing compresses to about 50% of its thickness to make a gasket type seal against the wall surface.
Route the wires into the box and terminate with sealant lled connectors to prevent water from attacking the connection,
thereby preventing costly callbacks. Best practice is to caulk the wiring hole after the wiring is installed. Close the cover of
the BB, BB2 or WP boxes and secure with provided cover screws or twist on the cover of the EU box to the second click.
Specications subject to change without notice.
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