BAPI Duct Mounted Thermistor Catalog Page

Duct Mounted Thermistor and RTD Temperature Probe (BA/#-D)

20787_INS_Duct_Passive_RTD_Therm

Overview and Identication

The BA/#-D is a duct mounted passive resistive sensor.
It comes in a variety of probe lengths and optional
mounting enclosures shown below.

The BA/#-D can be ordered with all the most common
Thermistor’s or RTD’s used with virtually any BAS
system. All thermistor and (385) RTD sensors come
with standard accuracy as well as high accuracy
models [XP] and [A] options respectively.

Installation & Operations

rev. 09/26/17

Fig 1: Duct Unit with No Box (NB)

Fig 2: Duct Unit with J-Box (Standard)

Fig 4: Duct Unit with BAPI-Box (BB) Enclosure

Fig 3: Duct Unit with Weatherproof (WP) Enclosure

Fig 5: Duct Unit with BAPI-Box 2 (BB2) Enclosure

Fig 6: Duct Unit with Weather Tight (EU) Enclosure

Specications subject to change without notice.

Fig 7: Duct Unit with BAPI-Box 4 (BB4) Enclosure

(A Pierceable Knockout Plug is available from BAPI

for the open port in the BB4. Part #BA/PKP-100)

1 of 4

Duct Mounted Thermistor and RTD Temperature Probe (BA/#-D)

Installation & Operations

20787_INS_Duct_Passive_RTD_Therm

Mounting

1. Place the sensor in the middle of the duct away from temperature stratied air, coils or humidiers to achieve the best
temperature reading.

2. Drill the probe hole as depicted on this page for the enclosure being used. Insert the probe into the duct.

3. Mount the enclosure to the duct using BAPI recommended #8 screws through a minimum of two opposing mounting tabs.
Weatherproof (WP) enclosures 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: Do not drill into the water tight enclosures (BB, BB2, WP, EU, EUO) which will violate the NEMA and/or IP rating.
Note 2: Use caulk or Teon 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.

rev. 09/26/17

Fig 8: Junction Box or No Box

(NB) Mounting Holes

Fig 11: Weather Tight (EU or

EUO) Enclosure Mounting Holes

Fig 9: BAPI-Box 2 (BB2)

Enclosure Mounting Holes

Fig 12: Weatherproof (WP)

Enclosure Mounting Holes

Fig 10: BAPI-Box (BB) Enclosure Mounting

Holes, Rotate 90° for Horizontal Mounting

Fig 13: BAPI-Box 4 (BB4) Enclosure

Mounting Holes

Specications subject to change without notice.

2 of 4