Robertshaw 9025i Remote Outdoor Temperature Sensor is used with the 9700i and 9800i Series Robertshaw thermostats. The sensor will sense outdoor air temperature and send the information to the thermostat. The outdoor temperature will be displayed below the room temperature.
Maximum Distance from Thermostat: 300 FT
Recommended Wire: 22AWG Minimum, shielded or non-shielded 2 conductor twisted pair.