The MQ-7B is a gas sensor, typically used for carbon monoxide detection. Here's a table format listing each pin of the MQ-7B with its pin number, pin name, and assumed function based on common usage for this sensor type:

Please note that the exact functions for pins could vary depending on the specific setup and wiring with supporting electronics. Always refer to the sensor's datasheet or product documentation for accurate pin functions. Unfortunately, there were no datasheet excerpts available for the MQ-7B in the provided data.