BAPI - Building Automation Products
The BAPI-Stat 2 Wireless Transmitter sends the temperature data through 418MHz RF to a receiver up to 100 feet away. It is available with optional humidity, temp setpoint and override.

The unit has an estimated battery life of 8 years with a transmit rate of about once every 20 seconds. Each variable sent by the transmitter is picked up by the receiver and converted by an Analog Output Module to a voltage, current or resistive signal for the controller.
Building Automation Products, Inc.
750, North Royal Avenue, Gays Mills, WI 54631 USA.