Gas Leak Detection Standards Aims LS-20B Gas Leak Detection Standards Aims LS-20B Standard equipment for calibrating refrigerant leak checkers, Leak Standard AIMS LS-20B can be used with refrigerants R-12, R-134a, R-22, R-404A, R-407C and R-410A. Comes out according to the standards set in g / year. The device is strong and durable. Made in Japan. Specifications  Refrigerant Type Leak Rate (g/year) [...]