An experimental evaluation of HVAC-grade carbon-dioxide sensors - Part 2: Performance test results

Som S. Shrestha, Gregory M. Maxwell

Research output: Contribution to journalConference articlepeer-review

7 Scopus citations

Abstract

This is the second paper in a four-part series reporting on the test and evaluation of typical carbon-dioxide sensors used in building HVAC applications. Fifteen models of NDIR HVAC-grade CO2 sensors were tested and evaluated to determine the accuracy, linearity, repeatability, and hysteresis of each sensor. This paper describes the performance of the sensors and provides a comparison with the manufacturers' specifications. The sensors were tested at 40% relative humidity, 73°F (22.8°C) temperature, 14.70 psia (101.35 kPa) pressure, and at five different CO2 concentrations (400, 750, 1100, 1450, and 1800 ppm). The test results showed a wide variation in sensor performance among the various manufacturers and in some cases a wide variation among sensors of the same model. In all, 45 sensors were evaluated: three from each of the 15 models. Among the 15 models tested, eight models have a single-lamp, single-wavelength configuration, four models have a dual-lamp, single-wavelength configuration, and three models have a single-lamp, dual-wavelength configuration.

Original languageEnglish
Pages (from-to)260-270
Number of pages11
JournalASHRAE Transactions
Volume116 PART 1
StatePublished - 2010
Event2010 ASHRAE Winter Conference - Orlando, FL, United States
Duration: Jan 23 2010Jan 27 2010

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