Crowcon’s new Gasman personal gas monitor is small, lightweight and easy to use in harsh environments. Weighing between just 3.7-4.6 oz. depending on sensor type, the durable Gasman offers ingress protection to IP65/67 and features single-button control, fully interchangeable i-module intelligent sensors, and vibrating, audible and visual alarms.Crowcon Detection Instruments, Milford, OH.