Comprehensive Functionality: This versatile tester is designed to check solenoid valves in oil burners, ensuring proper functionality and safety. It's an indispensable tool for heating system maintenance. Heating Circulation Pump Testing: Easily assess the rotational performance of heating circulation pumps. This feature is crucial for maintaining an efficient and operational heating system. AC Detection: The built-in AC detector swiftly identifies alternating current in electrical systems, enhancing the safety and efficacy of your maintenance tasks. and Reliable: Constructed with high-quality materials, this tester guarantees long-term durability and consistent performance, making it a valuable addition to any toolkit. Color: As Shown Material: Metal+Plastic Package Contents: 1 * Electromagnetic valve coil tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.