Why is Evapotranspiration (ET) important?
The primary component of hydrologic budgets, evapotranspiration (ET), the sum of evaporation and transpiration from plants, reflects the degree of water loss into the atmosphere, which is critical information when determining irrigation watering needs, groundwater supply levels, drought patterns, and other environmental impacts related to water budgets.
Superior ET Data to Inform Your Decisions
Whether you're focused on environmental research, agricultural research, or crop production, Onset's field-proven HOBO weather stations and sensors provide the accurate and reliable data needed to calculate evapotranspiration to support your water management decisions and understanding, from irrigation to climate impacts on ecosystems.
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Easily Calculate Evapotranspiration with HOBOlink Software
Using the FAO- and ASCE-recommended Penman-Monteith equation, HOBOlink remote monitoring software lets you easily set up Reference Evapotranspiration calculations for any HOBO RX weather station to easily track ET and determine watering needs.
Remote Monitoring Station Solutions for Evapotranspiration
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From $995.00 USD
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From $700.00 USD
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| Data Access | Remote access via cellular | Remote access via cellular |
| Memory | 32 MB, 2 million measurements, continuous logging | 16 MB, 1 million measurements, continuous logging |
| Internet Connection | Cellular | Cellular |
| HOBOnet Wireless Capability | Yes | Yes (RX2106/05 only) |
| Inputs | 10 (wired) + 50 (wireless) | 5 (wired) + 50 (wireless) |
| Mobile Alerts | Yes | Yes |
| Power Options | Solar | Solar or Battery |
| Water Level/Flow | Yes | Yes (RX2104/03 only) |
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View product | View product |
How Evapotranspiration Helped Researchers Understand Wetland Water Movement
Illinois researchers used HOBO weather and water sensors to study how atmospheric conditions impacted a wetland area’s water level and flow.
Frequently Asked Questions
HOBOlink provides Reference ET (ETo) for a short canopy, calculated by using the Penman-Monteith equation, which is recommended by the Food and Agriculture Organization (FAO) and the American Society of Civil Engineers (ASCE).
Temperature, Humidity, Wind Speed, and Solar Radiation parameters are all required to calculate Evapotranspiration (ET).