Tau Analyzers - 13 Total $175 per individual unit. $100 each if purchased together ($1,300) and will include the calibration kits for free. contact Brad at 913-268-6822 PRODUCT DETAILS www.tsi.com/ca-calc-combustion-analyzer-ca-6130 The Model CA-6130 measures O2, CO, draft pressure, supply air temperature, stack temperature and differential temperature (with optional accessory temperature probe). This two-gas combustion analyzer is a high quality, economical, tool for tuning burners on residential and light commercial boilers and other gas appliances for safe, efficient operation. The CA-6130 Combustion Analyzer also provides the basic Series CA-6100 features, which include a gas sampling probe that has an in-line water trap with a unique, long lasting, serviceable filter. This model also features cost- and time-saving field serviceability of sensors, sampling probe and sampling pump. Features and Benefits Measures O2, CO, supply air and stack temperature, and differential temperature (with optional accessory temperature probe) Replacement sensors shipped pre-calibrated for field installation Large 3-line display and intuitive operation Operates on AA-Cell batteries (12 hrs) or AC power Applications Supplement preventative maintenance Check burners in boilers, heat exchangers, furnaces, and process heaters for safe operation Monitor direct stack CO concentration, draft and differential pressures for safe operation Included Items NIST Traceable Certificate of Calibration 12-inch gas sample probe and 7-foot hose Four AA size batteries Optional Accessories: AC adaptor (115 VAC, NA) and rugged carrying case