Submersible Duct Temperature Sensors (BA/# -SD)
20905_ins_SubmersibleDuct_Passive_Passive
Overview and Identication
The Submersible Duct Unit is for duct mounting and
temperature measurement of air across cooling coils
or wet locations. The Stainless Steel probe tip is very
small (1/8”) to t between coil ns and made in different
lengths for a custom duct t.
The unit 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.
Installation & Operations
rev. 10/12/15
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 Enclosure (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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Mounting
Submersible Duct Temperature Sensors (BA/# -SD)
Installation & Operations
rev. 10/12/15
Fig 8: Cooling Coil Discharge Air
Temperature Application
Fig 9: Junction Box or No Box
(NB) Mounting Holes
Fig 12: Weather Tight (EU or
EUO) Enclosure Mounting Holes
Fig 10: BAPI-Box 2 (BB2)
Enclosure Mounting Holes
Fig 13: Weatherproof (WP)
Enclosure Mounting Holes
Fig 11: BAPI-Box (BB) Enclosure Mounting
Holes, Rotate 90° for Horizontal Mounting
Fig 14: BAPI-Box 4 (BB4) Enclosure
Mounting Holes
Specications subject to change without notice.
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Submersible Duct Temperature Sensors (BA/# -SD)
Installation & Operations
20905_ins_SubmersibleDuct_Passive_Passive
Wiring & Termination
BAPI recommends using twisted pair of at least 22AWG and sealant lled connectors for all wire connections. Larger
gauge wire may be required for long runs. All wiring must comply with the National Electric Code (NEC) and local codes.
Do NOT run this device’s wiring in the same conduit as high or low voltage AC power wiring.
BAPI’s tests show that inaccurate signal levels are possible when AC power wiring is present in the same conduit as the
sensor wires.
To Controller
Analog Input (AI)
(No Polarity)
Thermistor
or RTD
Sensor
To Controller
Analog Input (AI)
(No Polarity)
rev. 10/12/15
Fig. 15: 2 Wire Lead Wire Termination for Thermistor or RTD
Fig. 17: Terminal Strip (-TS) Option for 2 Wire Sensors
Termination
Fig. 16: 3 Wire Lead Wire Termination for RTD
Fig. 18: Terminal Strip (-TS) Option for 3 Wire
Sensors Termination
Fig. 19: Test & Balance (-TB) Option for 2 Wire Sensors
Termination
Specications subject to change without notice.
Fig. 20: Test & Balance (-TB) Option for 3 Wire
Sensors Termination
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Diagnostics
Submersible Duct Temperature Sensors (BA/# -SD)
Installation & Operations
rev. 10/12/15
Problems:
Controller reports higher or
lower than actual temperature
Possible Solutions:
- Conrm the input is set up correctly in the front end software
- Check wiring for proper termination & continuity. (shorted or open)
- Disconnect wires and measure sensor resistance and verify the “Sensor” output
is correct.
Specications
Sensor: Passive
Thermistor, 2 wire
RTD, 2 or 3 wire
Thermistor Thermal resistor (NTC)
Temp. Output Resistance Per Order1
Accuracy (std) ±0.36ºF, (±0.2ºC)
Accuracy
(Hi) ±0.18ºF, (±0.1ºC), [XP] option
Stability 0.036ºF/Year, (<0.02ºC/Year)
Heat dissipation 2.7 mW/ºC
Temp. Drift <0.02ºC per year
Probe range -40º to 221ºF (-40º to 105ºC)
RTD Resistance Temp Device (PTC)
Platinum (Pt) 100Ω and 1KΩ @0ºC, 385 curve
Platinum (Pt) 1KΩ @0ºC, 375 curve
Pt Accuracy (Std) 0.12% @Ref, or ±0.55ºF, (±0.3ºC)
Pt Accuracy (Hi) 0.06% @Ref, or ±0.277ºF,
(±0.15ºC), [A]option
Pt Stability ±0.25ºF, (±0.14ºC)
Pt Self Heating 0.4 ºC/mW @0ºC
Pt Probe range -40º to 221ºF, (-40 to 105ºC)
Nickel (Ni) 1000Ω @70ºF, JCI curve
Ni Probe range -40º to 221ºF (-40 to 105ºC)
Sensitivity Approximate @ 32ºF (0ºC)
Thermistor
Non-linier – Go to bapihvac.com
click “Sensor Specs”
RTD (Pt) 3.85Ω/ºC for 1KΩ RTD
0.385Ω/ºC for 100Ω RTD
Nickel (Ni) 2.95Ω/ºF for the JCI RTD
Lead wire 22awg stranded
Insulation Etched Teon, Plenum rated
Probe Stainless Steel,
Sheath 0.25” OD, probe 0.125
Probe Length 12” to 48”’ per order
Mounting Extension tabs (ears), 3/16” holes
Enclosure Types
J-Box -JB, w/eight ½” knockouts
No Box -NB, intended for open wiring
Weatherproof -WP, w/ two ½” FNPT entries, (Bell box)
BAPI-Box -BB, w/ four ½” NPSM & one ½” drill-out
BAPI-Box 2 -BB2, w/ three ½” NPSM & three ½” drill-outs
BAPI-Box 4: -BB4, w three ½” drill-outs & one ½” open port
Weather Tight -EU, -EUO, w/two ½” knockouts
Enclosure Ratings
J-Box -JB, NEMA 1
No Box -NB, No rating
Weatherproof -WP, NEMA 3R, IP14
BAPI-Box -BB, NEMA 4X, IP66
BAPI-Box 2 -BB2, NEMA 4X, IP66
BAPI-Box 4 -BB4, IP10
(IP44 with Knockout Plug in the open port)
Weather Tight -EU, NEMA 4X, IP66
Weather Tight -EUO, NEMA 4X, IP66, UV rated
Enclosure Materials
2x4 J-Box -JB, Galvanized steel, UL94H-B
No Box -NB, Nylon 66, UL94H-B
Weatherproof -WP, Cast Aluminum, UV rated
BAPI-Box -BB, Polycarbonate, UL94V-0, UV rated
BAPI-Box 2 -BB2, Polycarbonate, UL94V-0, UV rated
BAPI-Box 4: -BB4, Polycarbonate & Nylon, UL94V-0
Weather Tight -EU, ABS Plastic, UL94V-0
Weather Tight -EUO, ABS Plastic, UL94V-0, UV rated
Ambient (Encl.) 0 to 100% RH, Non-condensing
All BAPI-Boxes -BB, BB2, BB4, -40 to 185ºF, (-40 to 85ºC)
Weather Tight -EUO, EU, -40 to 185ºF, (-40 to 85ºC)
J-Box & No Box -JB, NB, -40 to 212ºF, (-40 to 100ºC)
Weatherproof -WP, -40ºF to 212ºF, (-40º to 100ºC)
Agency RoHS, *CE
PT= DIN43760, IEC Pub 751-1983,
JIS C1604-1989
*Passive Thermistors 20KΩ and smaller are
CE compliant
Specications subject to change without notice.
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