Abstract: An Automated data collection system for fugitive emission sources includes a handheld data terminal formed as a single portable package or integral unit. The data terminal is connected to an organic vapor analyzer (OVA) and an emissions receiving probe. The data terminal includes a display, a keypad, a microprocessor, a memory, a barcode reader and an analog to digital (A/D) converter for converting the emissions signal received from the OVA to a digital representation. The data terminal facilitates immediate on-site repair by providing repair guidance or repair options to the inspector during the inspections process. Front and rear magnets detachably mount the probe to the data terminal. The probe's rear magnet is recessed to matingly receive the unit's projecting rear magnet.