BAPI Averaging Duct Sensors Catalog Page
20903_ins_duct_avg_passive
Overview and Identication
The Averaging Sensor is for duct mounting and
temperature measurement of stratied air across the
duct to give the average temperature along the length
of the sensor.
The exible probe is made of aluminum and made in
different lengths for a custom duct t. The Averaging
Sensor is available in multiple thermistor or RTD
types as shown in the specications. Enclosure
mounting styles come in plastic or metal for both
NEMA 1 and NEMA 4 applications and are all plenum
rated.
Averaging Duct Sensors
BA/#-A
Installation & Operations
rev. 06/27/17
Fig 1: Duct Unit with No Box (NB)
Fig 2: Duct Unit with J-Box (Standard)
Fig 4: BAPI-Box (BB) Duct Unit
Fig 3: WeatherProof (WP) Duct Unit
Fig 5: BAPI-Box 2 (BB2) Duct
Fig 6: Weather Tight Enclosure (EU) Duct Unit
Specications subject to change without notice.
Fig 7: BAPI-Box 4 (BB4) Duct Unit
(A Pierceable Knockout Plug is available from BAPI
for the open port in the BB4. Part #BA/PKP-100)
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20903_ins_duct_avg_passive
Mounting
1. Place the sensor in the middle or top of the duct as shown in Fig 8 or Fig 9
so the exible probe can enter the duct in a convenient place. Drill the probe
and mounting holes as depicted for the enclosure being used. (No Box,
Handy Box, BB, BB2, WP, EU, BB4).
2. Insert the probe by unrolling the sensor into the duct carefully to avoid kinking
the sensor. Serpentine the duct with the sensor at least twice across the
stratied air in the duct to achieve the best average temperature reading.
At the sensor reversing points a turning bracket (BA/FPB) can be used to
support the sensor and to avoid kinking the sensor.
Averaging Duct Sensors
BA/#-A
Installation & Operations
rev. 06/27/17
3. Mount the enclosure to the duct using BAPI recommended #8 screws
through a minimum of two opposing mounting tabs provided. Weatherproof
(WP) enclosures will require assembly of the mounting tabs on opposite
corners. A 1/8 inch pilot screw hole in the duct makes mounting easier
through the mounting tabs. Use the enclosure tabs to mark the pilot hole
locations.
4. Snug up the sensors so that the foam backing is depressed to prevent air
leakage but do not over-tighten or strip the screw threads.
Note 1: Be sure not to drill into the weatherproof enclosures (BB, BB2, WP, EU,
EUO) which will violate the NEMA and/or the IP rating.
Note 2: Be sure to use caulk or Teon tape for your conduit entries to maintain
the appropriate NEMA or IP rating for your application.
Note 3: Conduit entry for outdoor or wet applications should be from the bottom
of the enclosure.
Fig 8: Flexible Sensor Horizontal Mount
(Best for Vertical Stratication)
Fig 9: Flexible Sensor Vertical Mount
(Best for Horizontal Stratication)
Fig 10: Junction Box or No Box (NB)
Mounting Holes and installation
Fig 11: BAPI-Box 2 (BB2) Mounting
Holes and installation.
Specications subject to change without notice.
Fig 12: BAPI-Box (BB) Enclosure Mount-
ing and installation Holes (Rotate
90° for Horizontal Mounting)
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