Long Life O2 sensor (with 4 - 5 years life expectation)
CO (H2 compensated) sensor *2
Calculated CO2 or optional NDIR measured CO2 (OPTION 64618 or 65648)
Large fuel type list + user definable fuel types
CO protection using 2nd pump (protects the CO sensor against unwanted high CO concentrations)*3
High energy Li-lon battery (for up 15 hours operation time) *4
Analyzer and probe leak test (allows you to check analyzer and probe for leaks)