A high precision weighing lysimeter for measuring evapotranspiration in greenhouses was developed. The instrument has a measurement of sensitivity of one part in 106, that is one order of magnitude better than any other so far described in the literature. With it, evaporation rates in a greenhouse, even at night, can be measured on a one minute time scale. Development and construction of the instrument are described and measurements of the transpiration of a tomato crop in a greenhouse are used to demonstrate its capabilities.
Meijer, J., Bot, G. P. A., Stanghellini, C., & Udink ten Cate, A. J. (1985). Development and application of a sensitive, high precision weighing lysimeter for use in greenhouses. Journal of Agricultural Engineering Research, 32(4), 321-336. https://doi.org/10.1016/0021-8634(85)90097-6