Development of Smart ROMs for Monitoring of NHS in Deodorization system for Restrooms using MOX based gas sensor and signal analytics


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Garg, V and Nat , A and Botre, BA and Singh, S and Akbar, SA (2018) Development of Smart ROMs for Monitoring of NHS in Deodorization system for Restrooms using MOX based gas sensor and signal analytics. In: National Conference on Advanes in Electronies & Communication on Devrices , MARCH 9-10 2018, Jaipur Rajasthan .

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Objective: Detection and monitoring of ammonia (Njll) in the restrooms is necessary for the smart toilets. To maintain the cleanliness in the restroom various gaseous needs to be monitored, among this gaseous ammonia is the major gas for pungent odor. It is reported in the literature that if the ammonia level crosses beyond certain threshold (10 ppm), then it is considered as bad or and indicates the need for cleanliness in the restroom. This work presents the signal conditioning and electronic interface developed for Figaro’s Metal Oxide-based ammonia gas sensor (TGS-2444). The requirement of the deodorization unit is that the ammonia concentration to be monitored in the restroom and if the ammonia concentration goes beyond the threshold then signal should be generated to actuate the UV lamp (to deodorize the ammonia). Methods and materials: The Tin oxide (SnO2) based sensing element is heated by the inbuilt Ruthenium oxide (Ruiz) based heater for more than 2 days. The sensor requires the application of a 250 ins heating cycle, which consists of a high state (4.8V) applied to heater for the first 14 ms, then followed by a low state (0V) pulse for the remaining 236 ms. The sensing cycle comprised 0 volts for the first 2 us, then 5 V for the next 5 ms and finally 0 volts for the remaining 243 ms. Ivor achieving optimal sensing, the detection point is measured after the midpoint of 5 ms pulse. Results: 4“he developed ROMs system consists of sensor activation pulses. The sensor is exposed to three different concentrations of ammonia gas i.e. 10 PPM, 20 PPM, 30 PPM and the response of the sensor for these concentrations is studied for monitoring the bad odor in the restrooms. Conclusions: A complete embedded system named ROMs for the detection of NH3 gas using a MOX based F’igaro’s gas sensor (3’GS-2444) has been developed at CSIR-CEER1, Pilani. Every part of the system has been characterized and tested in a laboratory.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Keywords: Restroom our monitoring system (ROMs); MOX based gas sensor;
Subjects: Electronic Systems > Embedded Systems
Divisions: Electronic Systems
Depositing User: Mr. Rabin Chatterjee
Date Deposited: 27 Jul 2021 09:30
Last Modified: 27 Jul 2021 09:30

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