PureAire Monitoring Systems has a line of economical, self-contained detection systems that alert personnel in water treatment plants to potentially hazardous leaks and releases of several common disinfection gases. Available for chlorine, chlorine dioxide and ozone, STX-PA Gas Monitors respond quickly to low level disinfectant leaks, yet are not permanently damaged by catastrophic or prolonged releases. The instruments feature a local digital display, local audio/visual alarm indicators, programmable dual-level concentration alarms, and built-in alarm and system fault relays. Measurement information is also output as a 4-20 mA analog signal.

The STX-PA Monitor consists of a renewable, plug-in electrochemical sensor and controller/transmitter and operates on 24 VDC power.