GasAlertMicro 5 from BW Technologies is rugged, water-resistant and capable of simultaneously monitoring up to five gases, including combustibles, H2S, CO, O2 and other toxic gases such as ammonia, chlorine and phosphine. Options include datalogging, motorized pump, multi-language support and a variety of power options.BW Technologies by Honeywell, www.gasmonitors.com, (888) 749-8878