1. Electrochemical Sensors
- (https://www.sciencedirect.com/science/article/abs/pii/S0043135410008304)
- (https://www.sciencedirect.com/science/article/pii/S0022072801003588)
- (https://www.sciencedirect.com/science/article/pii/S0956566316304274)
- (https://www.sciencedirect.com/science/article/pii/S0925400516306281)
- (https://www.sciencedirect.com/science/article/pii/S0003267015006418)
- (https://link.springer.com/article/10.1007/s13738-019-01740-0)
- (https://www.mdpi.com/14248220/19/6/1435)
- (http://www.freepatentsonline.com/20010042693.pdf)
- (http://www.freepatentsonline.com/9927389.pdf)
- (https://patents.google.com/patent/CN101706471A/en?q=electrochemical&q=sensors&q=water&oq=electrochemical+sensors+water&page=1)
- (https://patents.google.com/patent/CN103512938B/en?q=Real+Time&q=Bacterial&q=Water&q=Sensors&oq=Real+Time+Bacterial+Water+Sensors)
- (https://www.isoil.it/en/)
- (https://aquaticlife.ca/)
- (https://dcmprocesscontrol.co.nz/)
- (http://www.aquachem.ie/)
1.1. Potentiometric Sensors
- (https://www.sciencedirect.com/science/article/pii/S0003267002004749)
- (https://www.sciencedirect.com/science/article/pii/S092540051200915X)
- (https://www.sciencedirect.com/science/article/pii/S0011916409002379)
- (https://onlinelibrary.wiley.com/doi/abs/10.1002/elan.201000301)
- (https://pubs.acs.org/doi/abs/10.1021/acs.est.8b02969)
- (https://www.sciencedirect.com/science/article/pii/S0925400518321099)
- (https://mostwiedzy.pl/en/publication/the-possibility-of-the-application-of-a-potentiometric-sensor-with-all-solid-state-electrodes-for-th,147126-1)
- (https://www.sciencedirect.com/science/article/pii/S245191031830084X)(http://www.freepatentsonline.com/20070278096.pdf)
- (https://www.ttelectronics.com/products/categories/potentiometers/potentiometers/)
1.2. Voltammetric Sensors
- (https://www.sciencedirect.com/science/article/pii/S001346861832036X)
- (https://www.sciencedirect.com/science/article/pii/S138824811930058X)(https://link.springer.com/article/10.1007/s11581-017-2315-3)
- (https://link.springer.com/article/10.1007/s11581-017-2429-7)
- (https://www.sciencedirect.com/science/article/abs/pii/S0039914017310834)
- (https://link.springer.com/article/10.1007/s11581-013-0868-3)(http://www.freepatentsonline.com/5470484.pdf)
- (http://www.freepatentsonline.com/20070278096.pdf)
- (https://www.metrohm.com/en/)
1.3. Conductometric Sensors
- (https://www.sciencedirect.com/science/article/pii/S0925400515300010)
- (https://www.sciencedirect.com/science/article/pii/S1297956207001465)
- (https://www.sciencedirect.com/science/article/pii/S0956566304004907)
- (https://www.suezwatertechnologies.com/products/sievers-analyzers-and-instruments)
1.4. Metal-Oxide Semiconductor Sensors
2. Chromatography sensors
- (https://www.sciencedirect.com/science/article/pii/S0304389409015672)
- (https://www.sciencedirect.com/science/article/pii/S0021967305021114)
- (http://www.freepatentsonline.com/6225132.pdf)
- (http://www.freepatentsonline.com/4343767.pdf)
- (https://www.waters.com/1/3/liquid-chromatography-detectors)
- (https://www.agilent.com/en/products/liquid-chromatography)
- (https://www.shimadzu.com/an/hplc/)
3. Biosensors
- (https://www.sciencedirect.com/science/article/pii/S0925400517300199)(https://onlinelibrary.wiley.com/doi/full/10.1111/jam.13631)
- (https://link.springer.com/chapter/10.1007/978-3-030-02381-2_9)
- (https://www.mdpi.com/2227-9040/7/2/27)
- (https://www.sciencedirect.com/science/article/pii/B9780128157305000119)
- (https://www.sciencedirect.com/science/article/abs/pii/S0039914019305429)
- (http://www.freepatentsonline.com/20020102629.pdf)
- (https://patents.google.com/patent/JP4223799B2/en?q=biosensors&q=water&oq=biosensors+water)
- (https://www.biosensors.com/intl/)(http://assurecontrols.com/)
- (https://www.modernwater.com/)
- (http://www.aquams.com/)(http://www.mediquant.de/)
Photothermal sensors
4. Electromagnetic sensors
- (https://ieeexplore.ieee.org/abstract/document/5629426/)
- (https://ieeexplore.ieee.org/abstract/document/6879235)
- (https://ieeexplore.ieee.org/abstract/document/6104092/)
- (https://ieeexplore.ieee.org/abstract/document/7959536/)
- (http://www.freepatentsonline.com/4015471.pdf)
- (http://www.freepatentsonline.com/10363502.pdf)
- (http://www.globalw.com/)(https://krohne.com/en/)
5. Fiber-optic sensors
- (https://www.sciencedirect.com/science/article/pii/S0925400518318525)
- (https://www.mdpi.com/1996-1944/12/3/379)
- (https://www.sciencedirect.com/science/article/abs/pii/S0030401816300281)
- (https://www.sciencedirect.com/science/article/abs/pii/S0039914017302175)
- (https://www.sciencedirect.com/science/article/pii/S0925400519300619)
- (http://www.freepatentsonline.com/EP0590145B1.pdf)
- (http://www.freepatentsonline.com/6285807.pdf)
- (http://www.freepatentsonline.com/EP0884581A1.pdf)
- (http://www.freepatentsonline.com/9851338.pdf)
- (http://www.freepatentsonline.com/20050118704.pdf)
- (http://www.dsit.co.il/)
- (https://www.proximion.com/fiber-optic-sensors)
6. Smart sensors
6.1. Fluorescence chemical sensors
- (https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.200701785)
- (https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.200453914)
- (https://pubs.acs.org/doi/abs/10.1021/ja0284761)
- (https://pubs.acs.org/doi/abs/10.1021/jo301196m)
- (https://pubs.acs.org/doi/abs/10.1021/acs.inorgchem.7b02471)
- (https://www.sciencedirect.com/science/article/pii/S0925400518302478)
- (http://www.freepatentsonline.com/8062893.pdf)
- (http://www.freepatentsonline.com/9851338.pdf)
- (http://www.freepatentsonline.com/20180372704.pdf)
- (https://en.eijkelkamp.com/)(http://www.probesti.com/?p=7)
- (http://www.swanenviron.com/)
·Photo-induced electron transfer sensors
6.2. Phosphorescence chemical sensors
- (https://pubs.rsc.org/en/content/articlelanding/2019/dt/c9dt00251k/unauth#!divAbstract)
- (https://www.sciencedirect.com/science/article/abs/pii/S1010603018300650)
- (http://www.freepatentsonline.com/7772009.pdf)
- (http://www.freepatentsonline.com/20040124336.pdf)
- (http://www.freepatentsonline.com/WO2015080549A1.pdf)
- (http://www.freepatentsonline.com/6586256.pdf)
- (https://www.pme.com/https://www.senect.de/)
- (https://www.partech.co.uk/)
- (http://www.processinstruments.co.uk/)
- (https://www.ysi.com/)
- (https://www.aquafuture.de/e_start/start_english.html)
6.3. Microwave sensors
- (https://www.tandfonline.com/doi/abs/10.1080/09205071.2013.832393)
- (https://ieeexplore.ieee.org/abstract/document/8723034/)
- (https://ieeexplore.ieee.org/abstract/document/8409878)
- (https://ieeexplore.ieee.org/abstract/document/8765458)
- (https://www.tandfonline.com/doi/abs/10.1080/09205071.2017.1406408)
- (http://www.freepatentsonline.com/7151380.pdf)
- (https://www.emerson.com/en-us/automation/measurement-instrumentation/liquid-analysis)(http://www.aquar-system.com/)
7. Field-effect transistor sensors
- (https://pubs.rsc.org/en/content/articlelanding/2018/en/c8en00588e/unauth#!divAbstract)
- (https://pubs.rsc.org/en/content/articlelanding/2019/me/c8me00056e/unauth#!divAbstract)
- (http://ecst.ecsdl.org/content/89/6/51.short)
- (https://pubs.acs.org/doi/abs/10.1021/am505275a)
- (https://www.sciencedirect.com/science/article/abs/pii/S0039914001006117)
- (http://www.freepatentsonline.com/WO2007138506A1.pdf)
- (http://www.freepatentsonline.com/WO2016019381A1.pdf)
- (https://uwmrf.org/technology/ott1225/)
- (https://www.seabird.com/seafet-v2-ocean-ph-sensor/product?id=54627921732)
8. Wireless sensor network
- (https://ieeexplore.ieee.org/abstract/document/4367920)
- (https://ieeexplore.ieee.org/abstract/document/4367918)
- (https://ieeexplore.ieee.org/abstract/document/8587911)
- (https://link.springer.com/chapter/10.1007/978-981-10-8681-6_74)
- (http://www.freepatentsonline.com/9911297.pdf)
- (http://www.freepatentsonline.com/9734525.pdf)
- (https://www.seabird.com/seafet-v2-ocean-ph-sensor/product?id=54627921732)
- (https://www.stevenswater.com/)
- (https://www.environmental-expert.com/products/vardaqua-model-aqualog-wireless-logger-607785)(http://fluves.com/)
- (https://www.seabird.com/news/Halifax-closure-03-28-18-en.jsp)
- (https://www.seabird.com/)
9. Mass sensors
9.1. Surface acoustic wave sensors
- (https://pubs.acs.org/doi/abs/10.1021/ac010859e)
- (https://pubs.rsc.org/en/content/articlelanding/2006/em/b608358g/unauth#!divAbstract)
- (https://www.environmental-expert.com/companies/fastwave-56933)