The Model GD-1000 Premier Series gas detector from Eagle Microsystems can detect a range of gases, including chlorine, ammonia, sulfur dioxide, ozone and methane. It is capable of responding to levels of gas in air over a multitude of ranges. The unit consists of an electrochemical gas sensor and a microprocessor-based alarm indicator unit. The sensor can be mounted in the area of potential leakage while the monitor remains in a safe area, protecting the operator from exposure to the gas leak. The operator is alerted to a leak by an audible alarm and flashing display on the indicator. The alarm-indicating unit can interface with up to two sensors, each of which can monitor the same or a different gas. 610/323-2250; www.eaglemicrosystems.com.