The T501 Multipurpose Gauge is an essential precision tool designed specifically for Beckett oil burner systems, including AF, AFG, SF, SM, and AFD models. This gauge serves as a direct replacement for the T231 and T500 models, making it a versatile solution for technicians and HVAC professionals. Its primary function is to ensure accurate burner electrode alignment, which is critical for optimal combustion efficiency and reliable burner operation. Proper electrode positioning helps prevent ignition failures, reduces service calls, and extends equipment life. This package includes two gauges, providing a backup or allowing multiple technicians to have their own tool. The multipurpose design streamlines the alignment process, helping you achieve manufacturer-specified electrode settings quickly and accurately. Whether you're performing routine maintenance, troubleshooting ignition issues, or installing new burners, this gauge is an indispensable addition to your toolkit for working with Beckett heating systems.