Delta Ohm HD 2013

The rain gauge is formed by a metal base on which a tipping bucket is set. The rain collector cone, fixed to the aluminium cylinder, channels the water inside the tipping bucket: once the predefined level is reached, the calibrated bucked rotates under the action of its own weight, discharging the water. During the rotation phase, the normally closed reed contact opens for a fraction of a second, sending an impulse to the counter.

The quantity of rainfall measured is based on the count of the number of times the bucket is emptied: the reed contacts, normally closed, open at the moment of the rotation between one bucket’s section and the other. The number of impulses can be detected and recorded by a data logger such as the HD2013-DB Delta OHM or by a pulse counter.

The rain gauge is available with optional analog output (HD2013UA) at choice between 4…20 mA or 0…10 Vdc (to be specified when ordering) or with optional SDI-12 digital output (HD2013UD). The version with 4…20 mA output and the version with SDI-12 output require 7…30 Vdc power supply.

The version with 0…10 Vdc output requires 13…30 Vdc power supply. The versions with analog or SDI-12 output are equipped with a backup battery that allows maintaining the rainfall information even after short power supply outages (at least 10 seconds for HD2013UA, approx. 5 minutes for HD2013UD).

A removable filter for periodic cleaning and maintenance is inserted in the water collector cone so as to prevent leaves or other elements blocking the end of the hole.

For a better water flow, the collecting cone is treated with a non-adherent product. In the version with heating HD2013R, the heating circuit operates with 12 Vdc or 24 Vdc direct voltage (to be specified when ordering) and absorbs about 165W.

Heating is activated around +4 °C. When submitting your order, upon request a bird dissuader, made of eight 3 mm diameter spikes, 60 mm in height, can be installed on the rain gauge.