This readme.txt file was generated on <20220303> by Recommended citation for the data: Furuta, Daniel; Sayahi, Tofigh; Li, Jinsheng; Wilson, Bruce; Presto, Albert; Li, Jiayu. (2022). Dataset for "Characterization of inexpensive MOx sensor performance for trace methane detection". Retrieved from the Data Repository for the University of Minnesota, https://doi.org/10.13020/13xf-nw93. ------------------- GENERAL INFORMATION ------------------- 1. Title of Dataset Dataset for "Characterization of inexpensive MOx sensor performance for trace methane detection" 2. Author Information Principal Investigator Contact Information Name: Jiayu Li Institution: University of Minnesota, BBE Address: 1390 Eckles Ave., St. Paul MN, 55108 Email: lijiayu@umn.edu ORCID: 0000-0002-6774-4325 Associate or Co-investigator Contact Information Name: Daniel Furuta Institution: University of Minnesota, BBE Address: 1390 Eckles Ave., St. Paul MN, 55108 Email: furut011@umn.edu ORCID: 0000-0002-9603-9262 Associate or Co-investigator Contact Information Name: Tofigh Sayahi Institution: Carnegie Mellon University, Department of Mechanical Engineering Address: 5000 Forbes Ave., Pittsburgh, PA 15213 Email: tsayahi@andrew.cmu.edu ORCID: 0000-0003-2660-3179 Associate or Co-investigator Contact Information Name: Jinsheng Li Institution: University of Minnesota, BBE Address: 1390 Eckles Ave., St. Paul MN, 55108 Email: 22lij@aseschool.net ORCID: Associate or Co-investigator Contact Information Name: Bruce Wilson Institution: University of Minnesota, BBE Address: 1390 Eckles Ave., St. Paul MN, 55108 Email: wilson@umn.edu ORCID: 0000-0003-0921-3136 Associate or Co-investigator Contact Information Name: Albert Presto Institution: Carnegie Mellon University, Department of Mechanical Engineering Address: 5000 Forbes Ave., Pittsburgh, PA 15213 Email: apresto@andrew.cmu.edu ORCID: 0000-0002-9156-1094 3. Date published or finalized for release: TBD 4. Date of data collection (single date, range, approximate date) 20210721 to 20210731 5. Geographic location of data collection (where was data collected?): University of Minnesota Biosystems Engineering, 1390 Eckles Ave, St Paul MN 55108 6. Information about funding sources that supported the collection of the data: This work was funded by the US Department of Energy through the University Coalition for Fossil Energy Research (Grant S000663-USDOE). 7. Overview of the data (abstract): Laboratory calibration data for three replicates each of five types of inexpensive methane sensors in support of a study characterizing sensor suitability for atmospheric monitoring, with particular attention to sensitivity to humidity and temperature. Sensor performance from ambient levels to 10ppm was characterized with decaying methane pulses at five different temperatures. Methane, water vapor levels, and temperature were monitored with reference instruments. -------------------------- SHARING/ACCESS INFORMATION -------------------------- 1. Licenses/restrictions placed on the data: Public domain 2. Links to publications that cite or use the data: TBD 3. Was data derived from another source? No 4. Terms of Use: Data Repository for the U of Minnesota (DRUM) By using these files, users agree to the Terms of Use. https://conservancy.umn.edu/pages/drum/policies/#terms-of-use --------------------- DATA & FILE OVERVIEW --------------------- 1. File List A. Filename: 10ppm_data.csv Short description: Data for the inexpensive sensor characterization. -------------------------- METHODOLOGICAL INFORMATION -------------------------- 1. Description of methods used for collection/generation of data: As described in the paper. 2. Methods for processing the data: Data from the different instruments were associated by timestamp. Sensor readings were converted to resistances. The raw data was averaged to the minute. Datapoints above 10ppm methane concentrations were discarded. Detailed information is in the paper. 3. Instrument- or software-specific information needed to interpret the data: None 4. Standards and calibration information, if appropriate: As described in the paper. 5. Environmental/experimental conditions: As described in the paper. 6. Describe any quality-assurance procedures performed on the data: 7. People involved with sample collection, processing, analysis and/or submission: Daniel Furuta, Jiayu Li ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: 10ppm_data.csv ----------------------------------------- 1. Number of variables: 20 2. Number of cases/rows: 14186 (not including header) 3. Missing data codes: N/A 4. Variable List Name: datetime Description: date and time, formatted as yyyy-mm-dd hh:mm:ss Name: licor_ch4 Description: methane readings from reference instrument, ppb Name: licor_h2o Description: water vapor readings from reference instrument, ppm Name: t Description: temperature from rh/t logger, C Name: rh Description: relative humidity from rh/t logger, % Name: 2600_1, 2600_2, 2600_3 Description: TGS2600 sensor readings in ohms for replicates 1, 2 and 3 respectively Name: 2602_1, 2602_2, 2602_3 Description: TGS2602 sensor readings in ohms for replicates 1, 2 and 3 respectively Name: 2611C_1, 2611C_2, 2611C_3 Description: TGS2611-C00 sensor readings in ohms for replicates 1, 2 and 3 respectively Name: 2611E_1, 2611E_2, 2611E_3 Description: TGS2611-E00 sensor readings in ohms for replicates 1, 2 and 3 respectively Name: MQ4_1, MQ4_2, MQ4_3 Description: MQ4 sensor readings in ohms for replicates 1, 2 and 3 respectively