This rain gauge will allow you to accurately measure rainfall giving you a guideline on how much watering your plants will need. This rain gauge can be mounted to a 26mm diameter pole (this is not supplied) and will fill up to a maximum of 1litre. For best results positioning the rain gauge in an open area to get the most accurate readings. The measurements on the side of the product measure up from 1mm - 40mm in 1mm increments.
When the rain falls, the gauge cup will fill (up to a maximum of one litre).