Wireless Outside Air Temperature Transmitter, 418 MHz

Part Number: BA/WT-O-BB

List Price Starting At: $335.00
Buy / Configure
Outside Air Sensor in a BAPI-Box Enclosure

Wireless Outside Air Temperature Transmitters feature a UV-resistant plastic shield and a watertight IP66 BAPI-Box enclosure.

They transmit the temperature data through 418MHz RF to a receiver up to 100 feet away. They have an estimated battery life of 8 years and a transmit rate of about once every 20 seconds. Analog Output Modules connected to the receiver convert the data to a voltage, current or resistive signal for the controller.

  • 8 Year Battery Life
  • 100 Foot In Building Range, Extendable to 1,000 Feet with Repeater
  • Data Is Converted to a Voltage, Current or Resistance for the BAS


Humidity configurations for this unit are currently unavailable. Please contact BAPI for more information.

Popular Configurations
  • Outside Air Temperature and Humidity Transmitter
  • Outside Air Temperature Transmitter

Datasheet for Submittal

Instruction Sheet

Special Document

  • BAPI Non-Room Enclosure Styles – Application Note

    BAPI offers six enclosure styles for our non-room sensors. These enclosure include the Junction Box, the Weatherproof Enclosure (or “Bell Box”), the Weather Tight Enclosure, and the BAPI-Box, BAPI-Box 2 and BAPI-Box 4.   Junction Box The Junction …

  • IEC Enclosure Ratings Overview – Application Note

    The IEC (International Electrotechnical Commision) is an international committee that developes and publishes its recommendations for standardising international wiring devices and products. Ingress Protection (IP) is the grades of protection against external solids contacting the …

  • NEMA Enclosure Ratings – Application Note

    The National Electrical Manufacturers Association (NEMA) Standards Publication No. 250 defines 13 different enclosure “types” for non-hazardous locations.  These NEMA types define the applications and the environmental conditions that enclosures are designed to protect against …

  • UL94 Flammability Rating – Application Note

    All of BAPI’s indoor sensor bodies and transmitter enclosures are made from UL94, V-0 rated plastics. UL94 serves as a preliminary indication of a plastic’s acceptability for use as part of a device or appliance with …

  • Proper Procedure for Mounting BAPI Outdoor Sensors – Application Note

    The physical placement of BAPI outdoor temperature and humidity sensors depends on its application. If the outside air is being used for economizing, the sensor should be placed close to the economizer damper without being in …


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