Available models measure 02, CO, NO, NOx, CO2, efficiency, draft pressure, differential pressure, and temperature (stack and ambient). Factory-calibrated, field-replaceable sensors need no calibration. Features include automatic O2, baseline and auto-zeroing of sensors, 12 to 24-hr battery life, and automatic calculation of sample averages.

Alnor Products/TSI Inc.
500 Cardigan Rd.
Shoreview, MN 55126
(651) 490-2807
alnor.com