BAPI Air Humidity Catalog Page
Duct and Outside Air Humidity (H200-H300)
4 to 20mA or 0 to 5V Humidity Output with Optional Temperature Sensor
Installation and Operating Instructions
9938_ins_hum_temp_duct_out_5_20
Overview
The BA/(H200, H300) is a humidity transmitter which comes in 2% or 3% accuracies and an optional temperature sensor.
The temperature sensor can be either a Thermistor or RTD. It can be ordered for either Duct or Outside Air applications with
Weatherproof (WP), Weather Tight (EU), BAPI-Box (BB), or BAPI-Box 2 (BB2) Enclosures. The transmitter can be wired for
either a 0 to 5VDC output or a loop powered 4 to 20mA output.
Duct Unit Mounting
Mount at least 3 duct diameters from humidiers in the center of the duct wall. Drill a 1 inch hole for the probe in the duct
and use two number 8 sheet metal screws to attach the sensor to the duct. Center the probe in its mounting hole. Be sure
that the foam seals the hole, do not over tighten the screws.
rev. 02/15/18
Fig. 1: Duct Humidity
in a Weatherproof
(WP) Enclosure
Fig. 2: Duct Humidity
in a Weather Tight (EU)
Enclosure
Fig. 3: Duct Humidity
in a BAPI-Box (BB)
Enclosure
Fig. 4: Duct Humidity
in a BAPI-Box 2 (BB2)
Enclosure
Outside Air Mounting
Mount in a permanently shaded area away from windows and doors. Do not mount in direct sunlight. Mount with the sensor probe pointed down. Drill a hole large enough for your sensor cable through your mounting surface. Mount the unit to
the surface with the wiring knock out centered over the wiring hole. Pull the wiring into the unit and terminate using sealant lled connectors. Best practice is to seal the wiring hole with caulk after the wiring is installed. Be sure that the foam
on the back of the unit makes a good weather tight seal.
Fig. 5: Outside Humidity
in a Weatherproof (WP)
Enclosure
Fig. 6: Outside Humidity
in a Weather Tight (EU)
Enclosure
Specications subject to change without notice.
Fig. 7: Outside Humidity
in a BAPI-Box (BB)
Enclosure
Fig. 8: Outside Humidity
in a BAPI-Box 2 (BB2)
Enclosure
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Duct and Outside Air Humidity (H200-H300)
Table 1: Humidty Transmitter with 4 to 20mA Output
Red Power 10 to 35VDC
White
Black GND (Common) Ground for Power and Humidity Output
2.2KΩ Brown/White 1KΩ Orange/Orange
3KΩ Yellow/Black
3.25KΩ Brown/Green 1KΩ Green/Green
10K-3Ω Yellow/Red
10K-3(11K)Ω Yellow/Blue 100Ω Red/Red/Black*
50KΩ White/Blue
100KΩ Yellow/White
Additional sensors are available so your sensor may not be listed on this table.
4 to 20mA or 0 to 5V Humidity Output with Optional Temperature Sensor
Installation and Operating Instructions
9938_ins_hum_temp_duct_out_5_20
Wiring and 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 AC power wiring of NEC class 1, NEC class 2, NEC class 3 or with
wiring used to supply highly inductive loads such as motors, contactors and relays. BAPI’s tests show that uctuating and
inaccurate signal levels are possible when AC power wiring is present in the same conduit as the signal lines. If you are
experiencing any of these difculties, please contact your BAPI representative.
BAPI recommends wiring the product with power disconnected. Proper supply voltage, polarity, and
wiring connections are important to a successful installation. Not observing these recommendations may
damage the product and will void the warranty.
Table 3: Temperature Sensor Lead Wire Colors
Wire Color Purpose Note
White Not Used Not Used (Cap Wires)
Black Humidity Output 4 to 20 mA, To Analog Input of Controller
Thermistors Platinum RTDs - 2 Wire
1.8KΩ Orange/Red 100Ω Red/Red
Nickel RTD
rev. 02/15/18
Table 2: HumidityTransmitter with 0 to 5VDC Output
Wire Color Purpose Note
Humidity Output 0 to 5VDC, To Analog Input of Controller
Red Power 10 to 35VDC or 12 to 27 VAC
3.3KΩ Yellow/Brown
10K-2Ω Yellow/Yellow 2KΩ Brown/Blue
20KΩ W hite/White 1KΩ Orange/Orange/Black*
47KΩ Yellow/Orange
Optional Temperature Sensor Output
See Table 3 above for Wire Colors
(Sensors are not polarity sensitive,
3 wires used for 3-wire RTDs)
*In the 3-Wire RTD sensors listed above,
the two wires of similar color are
Silicon RTD
Platinum RTDs - 3 Wire
connected together.
Humidity Output
& Power
See Tables 1 and 2 above
for Wiring Information
Specications subject to change without notice.
Fig. 9: Wiring Diagram
NOTE: BAPI’s 2% and 3%, humidity transmitters ARE
polarity sensitive as well as reverse polarity protected.
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