Mastercool 55750 Combustible Gas Leak Detector September 6, 2013August 22, 2012 by admein Order Code : MS34 Features : Most advanced sensor technology and microprocessor. Detects leaks fast and accurately. Flexible 15 ” probe with bright LED light in tip. Six sensitivity levels. Audible leak alarm & visual leak size indicator. Custom moulded carrying case. A Quality product from Mastercool, USA. pdf-Mastercool55750CombustibleGasLeakDetector