Portable:Small enough to fit on a key-ring, this tester is an essential item that every plumber or heating contractor should have, enabling quick checks of pump use and rotation direction. Efficient Coil Testing: This rotation tester and ac detection for circulating pump is designed for quick and effective testing of AC coils, making it an essential accessory for refrigeration solenoid valve diagnostics. Material: Constructed from plastic material,this rotation tester and ac detection ensures long-last performance and reliability in various working conditions. Product Size: this solenoid valve coil detection tool is compact and portable, allowing for easy storage and convenient use. Versatile: In addition to testing circulation pump, this device can also check the use of oil burner solenoid valves, making it a multi-functional tool for various heating applications., Weight: 0.02094391489 pounds, Manufacturer: Tuidzljd