When two or more thermocouples are connected in which arrangement to increase the output voltage from the sensor, the connection is referred to as a thermopile.

• A. Parallel
• B. Series
• C. Thermopile
• D. Delta

Answer: (B)

When you want to boost the voltage from multiple thermocouples, you connect them in series. In a series arrangement, the voltages from each thermocouple add together, so the total output voltage increases as you add more junctions. A thermopile is formed by stacking thermocouples in series to raise the overall voltage produced by the sensor. If you connected them in parallel, the voltage would stay the same while the current capability increases, which doesn’t raise the output voltage. The delta arrangement isn’t a standard method for increasing thermocouple voltage. So the method that increases the output voltage is a series connection.