These analyzers are available in 2, 4, and 5 gas versions. Their light
weight and bright digital display let you take readings almost anywhere;
the 4 & 5 gas versions will also calculate Lambda/air fuel ratios.
Features include:
• Small, lightweight design
• Real time Lambda/air fuel ratio adjustment using
HC, O2, CO2 and CO gas measurements (4 & 5 gas models only)
• Fast 5-minute warm-up
• Large, easy-to-read, LED displays
• Automatic Calibration and Zero functions
Includes complete Sampling System with automatic back flush, operator
accessible filters. Rechargeable battery, low flow indicator warning
notifes operators to change filters, RS 232 PC interface, 1 year exchange
warranty.

37-9475 Two Gas Model (Now features built-in battery)
37-9530 Two Gas Model with DSF (Automatic Dilution Correction) 
37-9481 Four Gas Model
37-9482 Five Gas Model