How are toxic gases measured?
Gas monitors contain sensors that detect specific toxic gases (for example, CO, hydrogen sulfide, and nitrogen dioxide), as well as oxygen-deficient and explosive atmospheres. It is vital to worker safety that these monitors be properly configured, calibrated, and maintained. Instrument inaccuracy can lead to serious accidents – for example, monitors with sensors for chlorine and hydrogen sulfide will be of no use in a confined space that contains CO and nitrogen dioxide. A qualified person must ensure that monitoring instruments used in confined spaces have the proper sensors installed for the gases being measured.
