CUED Publications database

Low power NDIR CO<inf>2</inf> sensor based on CMOS IR emitter for boiler applications

Ali, SZ and De Luca, A and Racz, Z and Tremlett, P and Wotherspoon, T and Gardner, JW and Udrea, F (2014) Low power NDIR CO<inf>2</inf> sensor based on CMOS IR emitter for boiler applications. In: UNSPECIFIED pp. 934-937..

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© 2014 IEEE. In this paper we demonstrate the use of a CMOS infra-red emitter in a low power Non Dispersive Infra Red (NDIR) based carbon dioxide sensor for application in domestic boilers. Compared to conventional micro-bulbs as IR wideband sources, CMOS IR emitters offer several advantages: They are faster, smaller, have lower power consumption and can have integrated circuitry. The emitter is a 1.16 mm × 1.06 mm chip with an integrated FET drive and consists of a tungsten heater fabricated in a CMOS process followed by Deep Reactive Ion Etching (DRIE) to form a thin membrane to reduce power consumption. The NDIR sensor consists of the emitter and a commercial detector placed 5 mm apart in a simple tube. Operating the emitter at 10 Hz with a power consumption of only 40 mW, the sensor was measured in the range of 6-14% by volume of CO < inf > 2 < /inf > , showing a resolution of 0.5%, a response time of 20 s, and low cross-sensitivity to humidity.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions: Div B > Electronics, Power & Energy Conversion
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:43
Last Modified: 24 May 2018 02:08