Summit Four Gas Analyzers check Hydrocarbons, Carbon monoxide,
Carbon Dioxide and Oxygen percentages for four-stroke engines.
Analyzer features include:

  Freeze Displays to check individual results 
  Bright Panel display, with LEDs viewable from 20 feet 
  Dual Exhaust measurement   Auto Zero 
  Exhaust Dilution-tells when CO2 value falls below a set level. 
  Pump  Switch-Purges system without going into measure mode. 
  Low Flow Alarm-shows excessive response time 
  RS-232C hookup to PC or printer for hard copies of test results 
  Rugged, Compact, Portable 

37-9600  SUMMIT Four Gas Analyzer System. (upgradeable to 5 gas)
37-9601  Main Filter for Four Gas Analyzer