This function board is used to measure temperature as an analog input. The actual sensor is a 10k thermistor on the end of a 7 ft cord. The latest generation of this sensor is encased in a stainless steel tube with an epoxy filling. The sensor should be able to withstand water and rain.
The pass-through connector on the back of the temperature probe does not have a connection for analog input. Connecting another circuit to the analog input would negatively affect the sensor readings. Therefore, an ambient light sensor and temperature probe cannot exist on the same I/O channel.
A maximum of four temperature probes can be used be a single IO-204 web gateway at one time. This is because the IO-204 has four analog inputs.
The circuit diagram for this function board is as follows: