Many hazardous, corrosive, toxic, and environmentally unfriendly chemicals are
used in the processing industry. These chemicals require careful monitoring during
use, transportation, and handling. Analysis labs and control rooms must meet safety
codes. Further information can be obtained from the ISA series RP 60 practices. All
processing plants and labs must have an alarm system, which can shut down certain
operations if a problem occurs. These systems are regularly tested, and are often
duplicated to provide built-in fail-safe features, such as redundancy as protection
against sensor failure. Table 12.4 gives some of the chemicals used in industry and
the type of sensor used for measurement.