This is my prototype of a rain gauge heater
I am using a 12v 20W halogen bulb mounted in a porcelain connector block
The 12 V halogen bulb cost 0.50
Porcelain connector block 0.99
Temperature control box £4.99
Fitted to a Oregon WMR928NX Rain Gauge
PLEASE NOTE
I have studied electronics at Leek College and I would advise that if you intend to try out your own projects then I would advise,for safety reasons,that you study electronics before you start.
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I would recommend fitting the temperature control box
This will maintain a constant temperature and switches in and out when it reaches the setpoint
Rain gauge sensor
Mounted on a levelling table