OPEnS Lab - Environmental Sensing

Conference Posters/Talks

Undergraduate authors in bold.

2025

• Zheleva, D., Zamora Re, M., Tomasek, A., Haagsma, M., Selker, J. S., Udell, C., and Fuentes, C. 2025. Exploration of Dendrometer Data to Infer Plant Water Stress at High Temporal Resolution. B11D-03. In AGU Fall Meeting 2025. AGU.

• Hosford, A., Udell, C., and Selker, J. S. 2025. Field-Ready, Low-Cost, Evaporation-Free Passive Isotopic Rain Collector Fabricated by Epoxy Casting. H11J-1010A. In AGU Fall Meeting 2025. AGU.
• Nguyen, D., Hockert, E., Muzaffarov, M., Vania, Z., Udell, C., and Selker, J. S. 2025. Evaporometer: A Low-Cost, Open-Source, Load-Cell-Based Device for Collecting Rainfall and Evaporation Data. H21V-1263. In AGU Fall Meeting 2025. AGU.
• Le, N., Rasmussen, L., Zamora Re, M., Zheleva, D., Van Haren, J. L. M., Selker, J. S., and Udell, C. 2025. High Precision Zero-friction Magnetic Dendrometer. H21V-1266. In AGU Fall Meeting 2025. AGU.
• Zimmer, E., Jacklyn, C., Graham, R., Thiruppathi Ahila, S., Richards, W., Johnson, A. C., Selker, J. S., and Udell, C. 2025. Open Source Arduino Weather Station; Meet WeatherChimes. H21V-1267. In AGU Fall Meeting 2025. AGU.

• Udell, C., and Selker, J. S. 2025. Openly Published Environmental Sensing (OPEnS) | Advancing Open Environmental Instrumentation. H21V-1268. In AGU Fall Meeting 2025. AGU.

• Emmons, S., Hosford, A., Crocker, D., Chebrolu, A., Selker, J. S., Udell, C., and Tomasino, E. 2025. Wisp: Smoke Taint Sensor. H21V-1276. In AGU Fall Meeting 2025. AGU.

• Beslity, J., Deleeuw, J., Kizer, S., O'Neill, M., van Asselt, M., Le, N., Rasmussen, L., Udell, C., Selker, J. S., and Van Haren, J. L. M. 2025. Assessing the Impact of Evaporative Demand on Mature Cacao in a Rainforest Mesocosm Using Novel, Low-Cost Technology. H34F-04. In AGU Fall Meeting 2025. AGU.

• Nash, D., Johnson, A. C., Isaak, S., Aboudara, E., Christopherson, M., Lawnicki, X., Plescher, R., Mathews, N., Roering, J. J., Udell, C., Ord, A., Silva, L., Bell, L., Pierce, L., Prussian, K. M., Hanlon, J., Jacobs, A. B., and Foss, J. 2025. Rivers in the Sky, Landslides on the Ground: Community Science on Prince of Wales in Southeast Alaska. NH34A-04. In AGU Fall Meeting 2025. AGU.

• Moysey, S. M., Selker, J. S., Selbe, S., Stall, S., Accomazzi, A., Elhacham, E., Udell, C., Dawson, C., and Nelaev, A. 2025. Advancing Community Collaboration Across AGU Sections to Support the Advancement of Distributed Sensing Instrument, Data, and Software Standards and Practices in the Earth and Space Sciences. SE23B. In AGU Fall Meeting 2025. AGU.

• Silva, L., Bell, L., Hanlon, J., Pierce, L., Lekanof, M., Grant, J., Cash, R., Hotch, D., Trudeau, A., Hamar, E., Paddock, R. III, Weitzel, K., Refuerzo, J., Neumann, E., Patton, A., Roering, J. J., Mathews, N., Johnson, A. C., Nash, D., Rutz, J., Lempert, R., Brown, R., Wilcox, P., Grant, G. E., Fasth, B., Lanphier, K., Udell, C., Selker, J. S., Chandler, H., Plescher, R., Steratore, R., Danielson, Z., Tobey, S., and Heintz, R. 2025. Woven Earth: Attempting Co-Production of Geohazards Research with Tribal Governments in Southeast Alaska. SY31B-0630. In AGU Fall Meeting 2025. AGU.

• Udell, C., Zimmer, E., Jacklyn, C., Slaght, T., Johnson, A. C., Bell, L., Tobey, S., Silva, L., Johnson, I., Narvez, J., and Selker, J. S. 2025. Designing With, Not For: Co-Producing Open Source Environmental Monitoring Systems Through Community Science and Education in Southeast Alaska. SY32A-05. In AGU Fall Meeting 2025. AGU.

Peer-reviewed journal articles

Undergraduate authors in bold.

2025

• Camacho-Puerto, J., Sanchez-Murillo, R., Selker, J.S. Evaluating Precipitation Amount and Water Isotope Ratios in the OPEnS and Palmex RS1 Passive Collectors:  Implications for High-Frequency Precipitation Sampling. Hydrological Processes, July 2025. DOI: 10.1002/hyp.70195. 

•  Prince, R., Roy, K., Jesudason, N., Belinga, M., Field, J., Heiesy, D., Arvidson, A., Menne, T., Selker, J., and Udell, C. 2025. PolyWAG: Autonomous filtered water sampling for eDNA. HardwareX, e00617. https://doi.org/10.5281/zenodo.14160133
• Al-Agele, H.A., Nguyen, B.D., Zimmermann, L.P., Singh, G., Walter, C., Udell, C. and Selker, J.S., 2025. Low-cost composite autosampler for wastewater sampling. HardwareX, p.e00631.

• Selker, J., and Udell, C. 2025. Education and Technology - Synergy in Environmental Sensing. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences issue 383 vol 2302. https://doi.org/10.1098/rsta.2024.0281

   

2024

• Arellano, L.N.; Beverly, E.J.; Selker, J.S.; Nelke, M.; Singh, G. Testing triple oygen isotope preservation in teh new OPEnS totalizer against conventional monthly rainfall collectors. Chemical Geology, August 2024. doi.org/10.1016/j.chemgeo.2024.122351.
• Vaughn, V., Ensinger, A., Harris, E., Shumway, E., Walton, V., Selker, J. and Udell, C., 2024, Under Review. Open-Source Insect Camera Trap with Vibrational Detection and Luring for Monitoring T. albidosparsus. HardwareX
• Richards, W.; Selker, J.; Udell, C., 2024. Loom: A Modular Open-Source Approach to Rapidly Produce Sensor, Actuator, Datalogger Systems. Sensors, 24, 3466. https://doi.org/10.3390/s24113466

2023

• Woo, W., Richards, W., Selker, J. and Udell, C., 2023. WeatherChimes: An open IoT weather station and data sonification system. HardwareX, p.e00402. https://doi.org/10.1016/j.ohx.2023.e00402

2022

• Al-agele, H.A., Jashami, H. and Higgins, C.W., 2022. Evaluation of novel ultrasonic sensor actuated nozzle in center pivot irrigation systems. Agricultural Water Management, 262, p.107436. https://doi.org/10.1016/j.agwat.2021.107436
• AL-agele, H.A., Mahapatra, D.M., Nackley, L. and Higgins, C., 2022. Economic Viability of Ultrasonic Sensor Actuated Nozzle Height Control in Center Pivot Irrigation Systems. Agronomy, 12(5), p.1077. https://doi.org/10.3390/agronomy12051077
• Duncan, L., Miller, B., Shaw, C., Graebner, R., Moretti, M.L., Walter, C., Selker, J. and Udell, C., 2022. Weed Warden: A Low-Cost Weed Detection Device Implemented with Spectral Triad Sensor for Agricultural Applications. HardwareX, e00303. https://doi.org/10.1016/j.ohx.2022.e00303

2021

• AL-agele, H.A., Jashami, H., Nackley, L. and Higgins, C., 2021. A Variable Rate Drip Irrigation Prototype for Precision Irrigation. Agronomy, 11(12), p.2493. https://doi.org/10.3390/agronomy11122493
• Chu, M., Patton, A., Roering, J., Siebert, C., Selker, J., Walter, C. and Udell, C., 2021. SitkaNet: A low-cost, distributed sensor network for landslide monitoring and study. HardwareX, 9, e00191. https://doi.org/10.1016/j.ohx.2021.e00191
• Clonch, C., Huynh, M., Goto, B., Levin, A., Selker, J., and Udell, C. 2021. High Precision Zero-friction Magnetic Dendrometer. HardwareX, e00248. https://doi.org/10.1016/j.ohx.2021.e00248
• Levintal, E., Kang, K.L., Larson, L., Winkelman, E., Nackley, L., Weisbrod, N., Selker, J.S. and Udell, C.J., 2021. eGreenhouse: Robotically positioned, low-cost, open-source CO2 analyzer and sensor device for greenhouse applications. HardwareX, 9, e00193. https://doi.org/10.1016/j.ohx.2021.e00193
• Nguyen, B., Goto, B., Selker, J.S., Udell, C. 2021. Hypnos board: A low-cost all-in-one solution for environment sensor power management, data storage, and task scheduling. HardwareX, 10: e00213. https://doi.org/10.1016/j.ohx.2021.e00213

2020

• Goertzen, L., Mehr, N., Lopez, M., Udell, C., and Selker, J.S. Low-Cost and Precise Inline Pressure Sensor Housing and DAQ for Use in Laboratory Experiments. HardwareX. e00112. https://doi.org/10.1016/j.ohx.2020.e00112
• Mehr, N., Roques, C., Méheust, Y., Rochetfort, S., & Selker, J. S. (2020) Mixing and finger morphologies in miscible non-Newtonian solution displacement. Exp Fluids 61, 96. https://doi.org/10.1007/s00348-020-2932-x

2019

• Alcala, J. M. L., Haagsma, M., Udell, C. J., & Selker, J. S. (2019). HyperRail: Modular, 3D Printed, 1-100 meter, Programmable, and Low-cost Linear Motion Control System for Imaging and Sensor Suites. HardwareX, e00081. https://doi.org/10.1016/j.ohx.2019.e00081

• DeBell, T. C., Goertzen, L., Larson, L., Selbie, W., Selker, J. S., & Udell, C. (2019). OPEnS Hub: Real-time Data Logging, Connecting Field Sensors to Google Sheets. Frontiers in Earth Science. https://doi.org/10.3389/feart.2019.00137

• Lapo, K., Freundorfer, A., Pfister, L., Schneider, J., Selker, J., & Thomas, C. (2019). Distributed observations of wind direction using microstructures attached to actively heated fiber-optic cables. Atmospheric Measurement Techniques. https://doi.org/10.5194/amt-2019-188

• Lopez Alcala, J. M., Udell, C. J., & Selker, J. (2019). A User-Printable Three-Rate Rain Gauge Calibration System. Frontiers in Earth Science. https://doi.org/10.3389/feart.2019.00338

Conference posters

2024

• Gasper, P., Udell, C., Selker, J. S. 2024. EC Sense: An Open-Source Electrical Conductivity Meter Based on the Wenner Method. H13N-1185. In AGU Fall Meeting 2024. AGU.
• Belinga, M., Prince, R., Kurniawan, H., Levi, T., Selker, J. S., and Udell, C. 2024. eDNA Sampler: A Field Programmable and Customizable Auto-sampler for eDNA. H13N-1194. In AGU Fall Meeting 2024. AGU.
• Le, N., Rasmussen, L., Elwood-Dieu, M., Zamora Re, M., Zheleva, D., Nackley, L., Selker, J. S., and Udell, C. 2024. High Precision Zero-friction Magnetic Dendrometer. H13N-1188. In AGU Fall Meeting 2024. AGU.
• Truong, B., Olsen, A., Hale-Brown, C., Walter, C., Selker, J. S., and Udell, C. 2024. LilyPad - Internet Connected Freshwater Reservoir Monitoring Device. H13N-1189. In AGU Fall Meeting 2024. AGU.
• Udell, C. and Selker, J. 2024. Openly Published Environmental Sensing (OPEnS) | Advancing Open Environmental Instrumentation. H13N-1184. In AGU Fall Meeting 2024. AGU.
• Alholi, M., Synytsia, M., Tanner, S., Vaughn, V., Ensinger, A., Selker, J., Udell, C. 2024. Pied Piper Trap. H13N-1192. In AGU Fall Meeting 2024. AGU.
• Truong, B., Milford, C., Udell, C., Selker, J. 2024. Smart Rock: Low-Cost Stream Monitoring. H13N-1193. In AGU Fall Meeting 2024. AGU.
• Thiruppathi Ahila, S., Jacklyn, C., Gasper, P., Richards, W., Selker, J., Udell, C. 2024. WeatherChimes: Weather monitoring and Sonification System. H13N-1191. In AGU Fall Meeting 2024. AGU.

2023

•  Ensinger, A., Vaughn, Vincent., and Udell, C., 2023, December. Pied Piper: An Open-Source Vibrational Camera Trap for Monitoring Activity Patterns and Population Distributions of Pest Insects. In AGU Fall Meeting 2023. AGU.
•  Burgos, A., Woo, W., Richards, W., Selker, J., and Udell, C., 2023, December. WeatherChimes: Weather monitoring and Sonification System. H41S-2017. In AGU Fall Meeting 2023. AGU.
• Porter, J., Moyce, C., Selvakumar, S., Williams, P., Le, N., Rasmussen, L., Amador, C., Noble, R., Sears, A., Levin, A., Selker, J., and Udell, C., 2023, December. High Precision Zero-friction Magnetic Dendrometer. H41S-2020. In AGU Fall Meeting 2023. AGU.
• Udell, C., Walter, C., and Selker, J., 2023, December. Openly Published Environmental Sensing (OPEnS) | Advancing Open Environmental Instrumentation. H41S-2021. In AGU Fall Meeting 2023. AGU.
• Milford, C., Hale-Brown, C., Truong, B., Selker, J., and Udell, C., 2023, December. Smart Rock: Low-Cost User-Friendly Stream Monitoring. H41S-2022. In AGU Fall Meeting 2023. AGU.
• Truong, B., Hale-Brown, C., Olsen, A., Walter, C., Selker, J., and Udell, C., 2023, December. LilyPad: An Internet Connected Freshwater Reservoir Monitoring Device. H41S-2023. In AGU Fall Meeting 2023. AGU.
• Prince, R., Roy, K., Belinga, M., Jesudason, N., Heisey, D., Iler, J., Kurniawan, H., Field, J., McFeeters-Krone, G.,  Selker, J., and Udell, C., 2023, December. The OPEnS POLYWAG Environmental DNA Sampling System. H41S-2024. In AGU Fall Meeting 2023. AGU.
• Vidmantas, A., Richards, W., Schenbeck, A., Goshay, I., Walter, C.,  Selker, J., and Udell, C., 2023, December. Slide Sentinel: Centimeter-level Precision Remote Landslide Detection System. H41S-2026. In AGU Fall Meeting 2023. AGU.

2022

• Singh, G., Udell, C., Walter, C., Selker, J. 2022. Evaporometer: An open source, load cell-based environmental sensing system for rainfall and evaporation. H52O-0659 In AGU Fall Meeting 2022. AGU.
• Woo, W., Richards, W., Udell, C., Selker, J. 2022. WeatherChimes. H52O-0660 In AGU Fall Meeting 2022. AGU.
• Richards, W., Woo, W., Udell, C., Selker, J. 2022. LoomV4, A rapid prototyping library for environmental sensing, telemetry, logging, and actuation. H52O-0661 In AGU Fall Meeting 2022. AGU.
• Udell, C., Walter, C., Selker, J. 2022. Openly Published Environmental Sensing (OPEnS) | Advancing Open Environmental Instrumentation. H52O-0662 In AGU Fall Meeting 2022. AGU.
• Vaughn, V., Shumway, E., Walton, V., Selker, J., Udell, C. 2022. Pied Piper: An Open-Source Vibrational Camera Trap for Autonomously Monitoring Activity Patterns and Population Distributions of Treehopper and Leafhopper Pest Insects. H52O-0663 In AGU Fall Meeting 2022. AGU.
• Roy, K., Wandhekar, N., Arvidson, A., Li, T., Jesudason, N., Pohlschneider, E., Levi, T., Moncada, E., Udell, C., Selker, J., Walter, C. 2022. Updates on PolyWAG: Autonomous filtered water sampling for eDNA. H52O-0664 In AGU Fall Meeting 2022. AGU.
• Milford, C., Udell, C., Selker, J. 2022. Smart Rock: Low Cost, User Friendly Stream Monitoring. H52O-0665 In AGU Fall Meeting 2022. AGU.
• Selker, J., Udell, C., Walter, C., AL-agele, H. 2022. Novel Sampling Devices for Sewage System Monitoring: The Beaver Dam and OPEnS Integrating Sampler. H52O-0666 In AGU Fall Meeting 2022. AGU.

2021

• Carpenter, D., Leshchinsky, B.A., Walter, C., Selker, J.S., Abed, M. and Udell, C., 2021, December. FloDar: An Inline Flow Meter for Observing Flow Data for Research. H45T-1424. In AGU Fall Meeting 2021. AGU.
• Christensen, R., Selker, J.S., Udell, C., Walter, C., Bohl, R., Miller, J., Good, S.P. and Wiman, N., 2021, December. An Affordable Open Source Tree Sap Flow Measurement System Using Flexible Printed Circuit Boards. H45T-1423. In AGU Fall Meeting 2021. AGU.
• Clonch, C., Goto, B., Huynh, M., Levin, A., Selker, J.S. and Udell, C., 2021, December. High Precision Zero-friction Magnetic Dendrometer. H45T-1425. In AGU Fall Meeting 2021. AGU.
• Goto, B., Nguyen, B., Selker, J.S.S., and Udell, C. 2021, December. Hypnos Board: A Low-cost All-in-One Solution for Environment Sensor Power Management, Data Storage, and Task Scheduling. H45T-1426. In AGU Fall Meeting 2021. AGU.
• Hale-Brown, C., Whitlow, C., Veach, A., Escoto, M., Walter, C., Udell, C. and Selker, J.S., 2021, December. Smart Rock-Low Cost Water Monitoring. H45T-1429. In AGU Fall Meeting 2021. AGU.
• Udell, C. and Selker, J.S., 2021, December. Openly Published Environmental Sensing (OPEnS)| Advancing Open Environmental Instrumentation. H45T-1428. In AGU Fall Meeting 2021. AGU.
• Wandhekar, N., Nguyen, B., Pechetratanapanit, K., Menne, T., Arvidson, A., Jesudason, N., Roy, K., Kryuchkov, D., Li, T., Levi, T. and Udell, C., 2021, December. PolyWAG (Water acquired Genomics) Opensource 24-filter eDNA Water Sampler-Robotic DNA Collection with High Performance Sample Isolation and Preservation. H45T-1432. In AGU Fall Meeting 2021. AGU.
• Whitlow, C., Devarajan, A., Clonch, C., Segura, C., Selker, J.S. and Udell, C., 2021, December. Measuring the Electrical Conductivity of Rainfall in Real Time. H45T-1427. In AGU Fall Meeting 2021. AGU.

2020

• Chu, M., Patton, A., Udell, C., Walter, C. and Selker, J.S., 2020, December. SitkaNet: A Low-Cost, Open-Source System for Landslide Monitoring and Study. In AGU Fall Meeting 2020. AGU.
• Clonch, C., Huynh, M., Goto, B., Selker, J.S., Udell, C. and Levin, A., 2020, December. Low-cost, Low-profile Dendrometer Optimized for Grapevines. In AGU Fall Meeting 2020. AGU.
• Gasper, P., Pelster, Z., Best, B., Walter, C., Udell, C. and Selker, J.S., 2020, December. Measuring Darcy Flux and Transient Pore Velocity: Development of a Compact Temperature, Pressure, and Electrical Conductivity Sensor. In AGU Fall Meeting 2020. AGU.
• Goto, B., Nguyen, B., Selker, J.S. and Udell, C., 2020, December. Hypnos Board: A Low-Cost All-In-One Solution for Environment Sensor Power Management, Data Storage, and Task Scheduling. In AGU Fall Meeting 2020. AGU.
• Kang, K., Kerr, A.C., Smith, M., Brady, C.G., Koontz, N., Selker, J.S. and Udell, C., 2020, December. Loom, A Simple Modular Framework for Rapid Prototyping Environmental Sensors, Actuators, and Data Collection. In AGU Fall Meeting 2020. AGU.
• Nguyen, B., Pechetratanapanit, K., Walter, C., Udell, C., Zimmermann, L.P. and Selker, J.S., 2020, December. COVID Sampler: Open-source Composite Auto-sampler Against the Pandemic. In AGU Fall Meeting 2020. AGU.
• Shumway, E., Nieri, R., Udell, C. and Selker, J.S., 2020, December. Autonomous Vibrational Analysis and Insect Behavioral Manipulation With Pied Piper. In AGU Fall Meeting 2020. AGU.
• Udell, C. and Selker, J.S., Openly Published Environmental Sensing (OPEnS)| Distributed Sensing, Distributed Society. In AGU Fall Meeting 2020. AGU.

2019

• Ebrahimi, K.K., Lunn, G.R., Hudson, B.M., Udell, C. and Selker, J.S., 2019. Slide Sentinel: A Fully Automated, Low-Cost Landslide Monitoring System Using Real Time Kinematics. AGUFM, 2019, H11H-1573.

• Nguyen, B., Pechetratanapanit, K., Udell, C., Walter, C., Selker, J.S. and Levi, T., 2019. PolyWAG Water Acquired Genomics System: A Field Programmable and Customizable Auto-sampler for eDNA. AGUFM, 2019, pp.H53S-2076.

• Stroh, A.R., Winkelman, E., Larson, L., Levintal, E., Nackley, L., Davidson, J., Selker, J.S. and Udell, C., 2019. 3D HyperSense: 1-100 meter, Low-Cost Programmable Gantry and Sensor Suites. AGUFM, H53S-2091.

2018

• Alcala, J.M.L., Udell, C. and Selker, J.S., 2018. HyperRail: Modular, 3D Printed, 1-100 meter, Programmable, and Low-cost Linear Motion System for Imaging and Sensor Suites. AGU Fall Meeting 2018.
• DeBell, T., Goertzen, L., Udell, C. and Selker, J., 2018. OPEnS Hub-A Real-Time Decentralized Internet Portal, Connecting Field Sensors to Google Sheets. Proc. AGU Fall Meeting.
• Larson, L., Levintal, E., Lopez Alcala, J.M., Selker, J.S., Nackley, L. and Udell, C., 2018. A Mobile Sensor Package for Real-time Greenhouse Monitoring Using Open-source Hardware. Proc. AGU Fall Meeting, H13P-1988.
• Lunn, G.R., Kwon, M., Walter, C., Udell, C. and Selker, J.S., 2018. Slide Sentinel: Designing Remote Sensor Systems to Estimate Landslide Potential in Oregon Landscapes. AGUFM, NH21B-0821.
• Nelson, M.F., Lopez Alcala, J.M., Woo, M., DeBell, T.C., Udell, C. and Selker, J.S., 2018. Evaporometer Upgrades| Enclosure and Sensor Redesign for Improved Weatherproofing and Accuracy in Real-Time Environmental Data Gathering. AGUFM, 2018, H13P-1982.
• Stoddard, B., Fookes, J., Lee, D., Richardson, W., Walter, C., Udell, C., Good, S. and Selker, J.S., 2018. A PCB Based Sap Flux Sensor for Increased Manufacturability and Lower Cost. Proc. AGU Fall Meeting.
• Udell, C., DeBell, T.C., Goertzen, L.D., Lee, D. and Selker, J.S., 2018. Loom: Plug and Play Wireless Sensor Actuator Platform for Rapid Prototyping New Instrumentation. Proc. AGU Fall Meeting, IN13B-05.

2017

• Alcala, J.M.L., Udell, C. and Selker, J.S., 2017. A High Precision $3.50 Open Source 3D Printed Rain Gauge Calibrator. 2017. AGU Fall Meeting. H41J-0824
• DeBell, T. C.; Udell, C.; Kwon, M.; Selker, J. S.; Lopez Alcala, J. M. "Design and Deployment of a General Purpose, Open Source LoRa to Wi-Fi Hub and Data Logger." Proc. AGU Fall Meeting. 2017: H41J-1576.
• Krejci, A., Lopez Alcala, J.M., Nelke, M., Wagner, J., Udell, C., Higgins, C.W. and Selker, J.S., 2017. Development of an Open Source, Air-Deployable Weather Station. AGUFM, 2017, H41J-1583.
• Kwon, M., Lopez Alcala, J.M., DeBell, T.C., Udell, C. and Selker, J.S., 2017. Evaporometer| A Wireless Mesh of Open-Source Rainfall/Evaporation Gauge and Sensor Suite for In Situ Near-Real-Time Environmental Data. AGUFM, 2017, H41J-1604.
• Nelke, M., Selker, J.S. and Udell, C., 2017. The OPEnSampler: A Low-Cost, Low-Weight, Customizable and Modular Open Source 24-Unit Automatic Water Sampler. AGUFM, 2017, H41J-1596.
• Stoddard, Brett, John Selker, and Chet Udell. "Examining the Effectiveness of Commercial RFID Tags as Soil Moisture Sensors." Proc. AGU Fall Meeting. 2017.
• Udell, C. and Selker, J.S., 2017. Openly Published Environmental Sensing (OPEnS)| Advancing Open-Source Research, Instrumentation, and Dissemination. AGUFM, 2017, IN44A-04.

2016

• Selker, J.S., Good, S.P., Higgins, C.W., Sayde, C., Buskirk, B., Lopez, M., Nelke, M. and Udell, C., 2016. Recent developments from the OPEnS Lab. AGUFM, 2016, H34F-08.

Theses

• Miller, Jackson T. 2021. Error Propagation in Sap Flow Measurements Using the Heat Ratio Method. Undergraduate Honors Thesis: Oregon State University. https://ir.library.oregonstate.edu/concern/honors_college_theses/5712md90s
• Guo, M.D., 2020. The Implementation of Passive RFID Tags to Sample Volumetric Water Content for an Autonomous Irrigation System. Undergraduate Honors Thesis: Oregon State University. https://ir.library.oregonstate.edu/concern/honors_college_theses/ht24wr60d
• Stoddard, Brett S. 2019. Hacking Rfid Tags to Produce Economical Soil Moisture Sensors. Undergraduate Honors Thesis: Oregon State University. https://ir.library.oregonstate.edu/concern/honors_college_theses/4m90f2174
• Inberg, T.J., 2018. Project Management and Design of a Modularized Internet of Things (IoT) Prototyping System. Undergraduate Honors Thesis: Oregon State University. https://ir.library.oregonstate.edu/concern/honors_college_theses/xs55mj293