Measure all four factors that govern overall efficiency: CO2 content, draft, stack temperature and smoke. Accuracy to ±1/2%CO2 fully meets the requirements of the professional Heating Engineer. Yet an apprentice can follow the simple, illustrated step-by-step instructions. Add a small pitot tube, which will fit into the kit case, for air velocity measurements. Includes portable Dwyer® Magnehelic ® Draft Gage with large 4" dial instead of No. 171 Inclined Draft Gage, 0 to .25" W.C. range in .01" divisions. Also has air velocity scale with 300 to 2000 F.P.M, range. No levelling necessary; no gage oil required. Kit is otherwise identical to No. 1200-A and weighs only 7 lb 5 oz. OPTIONAL: On special order, the portable Dwyer® No.460 Air Meter may be substituted for the No. 171 Inclined Draft Gauge. | 
Gas Analyzers 
