The Toxi-II Series gas detector has been in service for many years gaining an enviable reputation for reliability and performance. The Toxi II is a single gas, personal protection monitor that continuously displays toxic gas concentrations. It costs just a little more than disposable detectors. Unlike typical disposable units that only display "remaining life", the Toxi II is a full-featured gas monitor providing continuous, digital display of the gas concentration, STEL, TWA, and Peak values as well as high, low, TWA, and STEL alarms. A simple to use one-button product, the Toxi II is easy to calibrate. Use the pre-set alarms, or modify the alarms to meet your specific requirements. In contrast to disposable detectors that are turned on once and remain on until their batteries expire, you decide when and where to use your Toxi II and you turn it on and off accordingly.