The Optical Methane Detector (OMD) uses advanced infrared technology to conduct mobile inspections of buried natural gas distribution, transmission, and gathering pipelines. The OMD is front mounted on a vehicle and calibrated by the driver or technician from inside the vehicle eliminating potential hazards such as explosive calibration gases. Leak indications are both audible and visual inside the vehicle at concentrations of less than 1 part per million (ppm) at 10,000 measurements per second. Data can be sent to a data logger or translated to a ground positioning satellite (GPS) system. Adding-on the Heath Survey Tracker will allow the ability to log mobile leak survey data and GPS locations of all natural gas leaks detected.