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SENSYX Refrigerant & Combustible Gas Leak Detector SFD200 & SFD201 RECHARGEABLE LITHIUM BATTERY: Enjoy the convenience of cordless operation with our rechargeable lithium battery. HIGHLY SENSITIVE SENSOR: Features a Japan-made heat dioxide semiconductor sensor, renowned for its exceptional sensitivity and reliability in detecting gas leaks. HIGHER SENSITIVITY: Adjustable sensitivity with High/Low levels. In addtion to that, SFD201 can detect HC/Combustible Gas such as R50/Methane, R170/Ethane, R290/Propane, and R600a/Isobutane. LARGE COLOR LCD SCREEN: Equipped with a vibrant, large LCD display, our leak detector ensures you don't miss any leaks. The clear level display not only pinpoints the location of leaks but also offers a quiet working environment, enhancing user comfort and efficiency during detection tasks. SAFETY STANDARDS: Rigorously tested and conforms to the UL1484 safety standard for peace of mind and reliability. US-BASED CUSTOMER SERVICE: We provide responsive and dedicated customer service along with technical support, all based in the US.