The Jerome J605 gold film hydrogen sulfide analyzer from Arizona Instrument is designed to detect hydrogen sulfide gas at concentrations as low as 3 parts per billion with a resolution of 20 parts per trillion. It has onboard data logging that can store up to 20,000 measurements for detailed recordkeeping and analysis, as well as a USB interface for data transfer and SCADA interface capabilities. Its solid-state design, durable metal casing and 18-hour battery life are ideal for nearly any case, and are always ready when needed. 800/528-4711; www.azic.com.