gov.noaa.nodc:0175572 eng utf8 dataset NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NOAA Contact Information Information for contacts at NCEI. information custodian 2025-12-14T19:43:33Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Raw light data, coral host genotypic information and zooxanthellae type and relative abundance from coral reefs in the Florida Keys 2015-09-21 to 2016-05-26 (NCEI Accession 0175572) 2018-09-11 publication 2018-08-21 creation NOAA National Centers for Environmental Information gov.noaa.nodc:0175572 NCEI Archive Management System 0175572 NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information publisher Elizabeth Dutra NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information resourceProvider NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information resourceProvider Derek Manzello Rosenstiel School of Marine, Atmospheric, and Earth Science Cooperative Institute for Marine and Atmospheric Studies (CIMAS) derek.manzello@noaa.gov https://cimas.earth.miami.edu/ HTTPS Rosenstiel School of Marine, Atmospheric, and Earth Science Cooperative Institute for Marine and Atmospheric Studies (CIMAS) website Institution web page information principalInvestigator Ian Enochs NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) ian.enochs@noaa.gov https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information collaborator Elizabeth Dutra NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) liz.dutra@noaa.gov https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information pointOfContact Manzello, Derek Rosenstiel School of Marine, Atmospheric, and Earth Science Cooperative Institute for Marine and Atmospheric Studies https://cimas.earth.miami.edu/ HTTPS Rosenstiel School of Marine, Atmospheric, and Earth Science Cooperative Institute for Marine and Atmospheric Studies (CIMAS) website Institution web page information author Enochs, Ian NOAA Atlantic Oceanographic and Meteorological Laboratory https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information author Kolodziej, Graham Rosenstiel School of Marine, Atmospheric, and Earth Science Cooperative Institute for Marine and Atmospheric Studies https://cimas.earth.miami.edu/ HTTPS Rosenstiel School of Marine, Atmospheric, and Earth Science Cooperative Institute for Marine and Atmospheric Studies (CIMAS) website Institution web page information author Valentino, Lauren Rosenstiel School of Marine, Atmospheric, and Earth Science Cooperative Institute for Marine and Atmospheric Studies (CIMAS) lauren.valentino@noaa.gov https://cimas.earth.miami.edu/ HTTPS Rosenstiel School of Marine, Atmospheric, and Earth Science Cooperative Institute for Marine and Atmospheric Studies (CIMAS) website Institution web page information author Dutra, Elizabeth NOAA Atlantic Oceanographic and Meteorological Laboratory https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information author Serrano, Xaymara author Atlantic Oceanographic and Meteorological Laboratory (AOML) https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information author NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information contributor tableDigital Several parameters were used to assess coral bleaching in the Florida Keys as part of NOAA’s Coral Reef Conservation Program (CRCP). The data described in this package are light, seawater pH, and coral symbiont assemblage data collected from the upper and lower Florida Keys. Light data was collected using a PAR sensor which measures light as photosynthetically active radiation (PAR, umol m-2 s-1). Seawater pH was collected using a SAMI pH sensor or a SeaBird SeaFET pH sensor. These sensors were located at the same sites as the PAR sensors and recorded pH hourly. During peak bleaching (22-25 September 2015), 20 colonies of O. faveolata were sampled with a hammer and chisel from 10 sites (n=200 total coral samples). All corals were sampled from the top of the colony given that symbiont types can change with colony orientation. A small subsample was immediately preserved in 95% ethanol for genetic analysis. Genomic DNA was extracted using the organic extraction protocol described in Rowan and Power (1991). Quantitative PCR (qPCR) assays were used to understand patterns of algal symbiont community structure to detect the presence of background symbiont types. Zooxanthellae type and abundance data are described in this package to understand the relationship between O. faveolata and Symbiodinium to assess coral bleaching responses. Symbiont assemblages in the data set are described by clades A, B, C and D since O. faveolata has been shown to associate with members from all these clades. This dataset is available to the public for a wide variety of uses including scientific research and analysis. Funding Agency: NOAA Coral Reef Conservation Program Funding Agency: National Oceanic and Atmospheric Administration completed historicalArchive NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information pointOfContact asNeeded https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0175572 Preview graphic PNG 0175572 NCEI ACCESSION NUMBER 2018-08-09 publication DNA pH PHOTOSYNTHETIC ACTIVE RADIATION (PAR) theme NODC DATA TYPES THESAURUS PAR Sensor PCR machine pH sensor instrument NODC INSTRUMENT TYPES THESAURUS in situ laboratory analyses theme NODC OBSERVATION TYPES THESAURUS NOAA Atlantic Oceanographic and Meteorological Laboratory dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS NOAA Atlantic Oceanographic and Meteorological Laboratory dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS Coral Reef Conservation Program (CRCP) CORAL REEF STUDIES project NODC PROJECT NAMES THESAURUS Coastal Waters of Florida Florida Keys National Marine Sanctuary North Atlantic Ocean place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication AOML Atlantic Oceanographic and Meterological Laboratory dataCentre Contributing Organizations DOC/NOAA/OAR/AOML > Atlantic Oceanographic and Meteorological Laboratory, OAR, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian 31134 Elucidating the recipe for coral reef resilience in the Florida Keys project CRCP Project Genetic Data Sets > PCR/QPCR Detection and Measurements Numeric Data Sets > Biology theme CoRIS Discovery Thesaurus EARTH SCIENCE > Biosphere > Vegetation > Algae > Reef Monitoring and Assessment EARTH SCIENCE > Biosphere > Vegetation > Algae > Zooxanthellae EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Coral Colony Size and Condition EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Molecular Genetic Analysis > Coral Symbiont Clade Typing EARTH SCIENCE > Oceans > Ocean Chemistry > pH EARTH SCIENCE > Oceans > Ocean Optics > Photosynthetically Active Radiation theme CoRIS Theme Thesaurus EARTH SCIENCE > BIOSPHERE > OMICS > BUILDING BLOCKS > DNA EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH EARTH SCIENCE > OCEANS > OCEAN OPTICS > PHOTOSYNTHETICALLY ACTIVE RADIATION theme Global Change Master Directory (GCMD) Science Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian PAR SENSORS > Photosynthetically Active Radiation Sensors PH METERS > PH METERS instrument Global Change Master Directory (GCMD) Instrument Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian COUNTRY/TERRITORY > United States of America > Florida > Lower Florida Keys (24N081W0021) COUNTRY/TERRITORY > United States of America > Florida > Upper Florida Keys (24N080W0018) OCEAN BASIN > Atlantic Ocean > North Atlantic Ocean > Florida Reef Tract > Lower Florida Keys (24N081W0021) OCEAN BASIN > Atlantic Ocean > North Atlantic Ocean > Florida Reef Tract > Upper Florida Keys > Upper Florida Keys (24N080W0018) place CoRIS Place Thesaurus OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF AMERICA OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF MEXICO place Global Change Master Directory (GCMD) Location Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian M2EAWC Send2NCEI Submission Package ID accessLevel: public otherRestrictions Cite as: Manzello, Derek; Enochs, Ian; Kolodziej, Graham; Valentino, Lauren; Dutra, Elizabeth; Serrano, Xaymara; Atlantic Oceanographic and Meteorological Laboratory (AOML) (2018). Raw light data, coral host genotypic information and zooxanthellae type and relative abundance from coral reefs in the Florida Keys 2015-09-21 to 2016-05-26 (NCEI Accession 0175572). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0175572. Accessed [date]. Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. otherRestrictions Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose. Cunning, R., & Baker, A. C. (2012). Excess algal symbionts increase the susceptibility of reef corals to bleaching. Nature Climate Change, 3(3), 259–262. https://doi.org/10.1038/nclimate1711 2012-10-14 publication International DOI Foundation (IDF) https://doi.org/10.1038/nclimate1711 https://doi.org/10.1038/nclimate1711 HTTPS https://doi.org/10.1038/nclimate1711 journal article information Cunning, Ross author Baker, Andrew C. author Springer Science and Business Media LLC publisher documentDigital Nature Clim Change 3(3) ISSN 1758-678X, ISSN 1758-6798, pp. 259-262 crossReference sciencePaper Cunning, R., Silverstein, R. N., & Baker, A. C. (2015). Investigating the causes and consequences of symbiont shuffling in a multi-partner reef coral symbiosis under environmental change. Proceedings of the Royal Society B: Biological Sciences, 282(1809), 20141725. https://doi.org/10.1098/rspb.2014.1725 2015-06-22 publication International DOI Foundation (IDF) https://doi.org/10.1098/rspb.2014.1725 https://doi.org/10.1098/rspb.2014.1725 HTTPS https://doi.org/10.1098/rspb.2014.1725 journal article information Cunning, R. Department of Marine Biology and Ecology, Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, USA author Silverstein, R. N. Department of Marine Biology and Ecology, Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, USA author Baker, A. C. Department of Marine Biology and Ecology, Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, USA author The Royal Society publisher documentDigital Proc. R. Soc. B. 282(1809) ISSN 0962-8452, ISSN 1471-2954, p. 20141725 crossReference sciencePaper Enochs, I. C., Manzello, D. P., Donham, E. M., Kolodziej, G., Okano, R., Johnston, L., Young, C., Iguel, J., Edwards, C. B., Fox, M. D., Valentino, L., Johnson, S., Benavente, D., Clark, S. J., Carlton, R., Burton, T., Eynaud, Y., & Price, N. N. (2015). Shift from coral to macroalgae dominance on a volcanically acidified reef. Nature Climate Change, 5(12), 1083–1088. https://doi.org/10.1038/nclimate2758 2015-08-10 publication International DOI Foundation (IDF) https://doi.org/10.1038/nclimate2758 https://doi.org/10.1038/nclimate2758 HTTPS https://doi.org/10.1038/nclimate2758 journal article information Enochs, I. C. author Manzello, D. P. author Donham, E. M. author Kolodziej, G. author Okano, R. author Johnston, L. author Young, C. author Iguel, J. author Edwards, C. B. author Fox, M. D. author Valentino, L. author Johnson, S. author Benavente, D. author Clark, S. J. author Carlton, R. author Burton, T. author Eynaud, Y. author Price, N. N. author Springer Science and Business Media LLC publisher documentDigital Nature Clim Change 5(12) ISSN 1758-678X, ISSN 1758-6798, pp. 1083-1088 crossReference sciencePaper Kemp, D. W., Thornhill, D. J., Rotjan, R. D., Iglesias-Prieto, R., Fitt, W. K., & Schmidt, G. W. (2015). Spatially distinct and regionally endemic Symbiodinium assemblages in the threatened Caribbean reef-building coral Orbicella faveolata. Coral Reefs, 34(2), 535–547. https://doi.org/10.1007/s00338-015-1277-z 2015-02-27 publication International DOI Foundation (IDF) https://doi.org/10.1007/s00338-015-1277-z https://doi.org/10.1007/s00338-015-1277-z HTTPS https://doi.org/10.1007/s00338-015-1277-z journal article information Kemp, Dustin W. author Thornhill, Daniel J. author Rotjan, Randi D. author Iglesias-Prieto, Roberto author Fitt, William K. author Schmidt, Gregory W. author Springer Science and Business Media LLC publisher documentDigital Coral Reefs 34(2) ISSN 0722-4028, ISSN 1432-0975, pp. 535-547 crossReference sciencePaper Manzello, D., Warner, M., Stabenau, E., Hendee, J., Lesser, M., & Jankulak, M. (2008). Remote monitoring of chlorophyll fluorescence in two reef corals during the 2005 bleaching event at Lee Stocking Island, Bahamas. Coral Reefs, 28(1), 209–214. https://doi.org/10.1007/s00338-008-0455-7 2008-12-17 publication International DOI Foundation (IDF) https://doi.org/10.1007/s00338-008-0455-7 https://doi.org/10.1007/s00338-008-0455-7 HTTPS https://doi.org/10.1007/s00338-008-0455-7 journal article information Manzello, D. author Warner, M. author Stabenau, E. author Hendee, J. author Lesser, M. author Jankulak, M. author Springer Science and Business Media LLC publisher documentDigital Coral Reefs 28(1) ISSN 0722-4028, ISSN 1432-0975, pp. 209-214 crossReference sciencePaper MIEOG, J. C., VAN OPPEN, M. J. H., BERKELMANS, R., STAM, W. T., & OLSEN, J. L. (2009). Quantification of algal endosymbionts (Symbiodinium) in coral tissue using real‐time PCR. Molecular Ecology Resources, 9(1), 74–82. https://doi.org/10.1111/j.1755-0998.2008.02222.x 2009-01 publication International DOI Foundation (IDF) https://doi.org/10.1111/j.1755-0998.2008.02222.x https://doi.org/10.1111/j.1755-0998.2008.02222.x HTTPS https://doi.org/10.1111/j.1755-0998.2008.02222.x journal article information MIEOG, J. C. author VAN OPPEN, M. J. H. author BERKELMANS, R. author STAM, W. T. author OLSEN, J. L. author Wiley publisher documentDigital Molecular Ecology Resources 9(1) ISSN 1755-098X, ISSN 1755-0998, pp. 74-82 crossReference sciencePaper Rowan, R., Knowlton, N., Baker, A., & Jara, J. (1997). Landscape ecology of algal symbionts creates variation in episodes of coral bleaching. Nature, 388(6639), 265–269. https://doi.org/10.1038/40843 1997-07-17 publication International DOI Foundation (IDF) https://doi.org/10.1038/40843 https://doi.org/10.1038/40843 HTTPS https://doi.org/10.1038/40843 journal article information Rowan, Rob author Knowlton, Nancy author Baker, Andrew author Jara, Javier author Springer Science and Business Media LLC publisher documentDigital Nature 388(6639) ISSN 0028-0836, ISSN 1476-4687, pp. 265-269 crossReference sciencePaper Rowan, R., & Powers, D. (1991). Molecular genetic identification of symbiotic dinoflagellates (zooxanthellae). Marine Ecology Progress Series, 71, 65–73. https://doi.org/10.3354/meps071065 1991 publication International DOI Foundation (IDF) https://doi.org/10.3354/meps071065 https://doi.org/10.3354/meps071065 HTTPS https://doi.org/10.3354/meps071065 journal article information Rowan, R author Powers, DA author Inter-Research Science Center publisher documentDigital Mar. Ecol. Prog. Ser. 71 ISSN 0171-8630, ISSN 1616-1599, pp. 65-73 crossReference sciencePaper eng; USA utf8 environment oceans -81.58263 -80.54806 24.52202 24.95375 2015-09-21 2016-05-26 NOAA National Centers for Environmental Information +1-301-713-3277 ncei.info@noaa.gov pointOfContact In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media. Contact NCEI for other distribution options and instructions. Originator data format 11.984 https://www.ncei.noaa.gov/archive/accession/0175572 HTTPS Web browser NCEI Dataset Landing Page Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/oas/175572 HTTPS Web browser Descriptive Information Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/download/175572 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0124/0175572/ FTP Any FTP client FTP These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP). download dataset NCEI Accession 0175572 v1.1 was published. 2018-09-11T19:24:15Z NCEI Accession 0175572 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0175572/1.1 HTTPS NCEI Accession 0175572 v1.1 published 2018-09-11T19:24:15Z download dataset Parameter or Variable: PHOTOSYNTHETIC ACTIVE RADIATION (PAR) (measured); Units: umol m-2 s-1; Observation Category: in situ; Sampling Instrument: sensor; Sampling and Analyzing Method: Photosynthetically active radiation (PAR, 400-700nm) was measured hourly using SeaBIRD EcoPAR Parameter or Variable: pH (measured); Units: pH; Observation Category: in situ; Sampling Instrument: sensor; Sampling and Analyzing Method: Seawater pH was measured hourly. Two instruments were used. (1) SAMI-pH (2) SeaFET-pH sensor Parameter or Variable: DNA (measured); Units: count; Observation Category: laboratory analysis; Sampling Instrument: PCR machine; Sampling and Analyzing Method: Quantitative PCR (qPCR) assays were used to understand patterns of algal symbiont community structure to detect the presence of background symbiont types. Zooxanthallae type and abundance data are described in this package to understand the relationship between O. faveolata and Symbiodinium to assess coral bleaching responses. Symbiont assemblages in the data set are described by clades A, B, C and D since O. faveolata has been shown to associate with members from all these clades. asNeeded Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness. NOAA National Centers for Environmental Information custodian PAR Sensor PAR Sensor Photosynthetically Active Radiation Sensor The PAR sensor measures global solar radiation from 400 to 700 nm, which approximates the spectral band active in photosynthesis. The response of the instrument falls sharply to zero on either side of this band, and between 400 and 670 nm it increases monotonically from about 50% to 100%. There is no protective glass dome over the receiving surface. Irradiance from the sun passes through a small white visible bandpass filter/diffuser in the shape of a horizontal disk at the top of the instrument. Within the instrument radiation is directed through a series of colored glass filters and onto a silicon photodiode detector. The factory-supplied calibration converts the signal from the detector to a flux of photons in micro-mole (of photons) s-1 m-2. (One micro-mole equals 6.022 E17 photons.) For the solar spectrum, these units may be converted to watts per square meter by dividing by 4.6. (http://www.srrb.noaa.gov/instrument/par.htm) PCR machine PCR machine thermal cycler, thermocycler, PCR machine, DNA amplifier The thermal cycler (also known as a thermocycler, PCR machine or DNA amplifier) is a laboratory apparatus most commonly used to amplify segments of DNA via the polymerase chain reaction (PCR). https://en.wikipedia.org/wiki/Thermal_cycler, 2017-05-02. pH sensor pH sensor generic meter used to measure pH Any of a class of instruments used to quantify pH in a water or other type of sample.