Author Topic: Rain Sensor for TIAO Smart Network Sprinkler Controller  (Read 211 times)


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Rain Sensor for TIAO Smart Network Sprinkler Controller
« on: February 14, 2017, 07:49:07 AM »

I’m about to order a TIAO Smart Network Sprinkler Controller unit and I wish to buy also an appropriate Rain Sensor to benefit from its full capabilities.

The question is…which rain sensor is the right one?

I read all the forum here but I wasn’t able to find a similar post (in case I missed it please beg my pardon).

From what I understand there are different types of rain sensors available to purchase:
  • Based upon water accumulation: there is a small container with a floating device that triggers a NO/NC button based on the total volume of water collected.

  • Based upon water evaporation: there are a various numbers of wood circular pieces mounted on a vertical spike, and laterally there is an adjustable switch. When water permeates wood causes its expansion, ultimately activating the switch. Then evaporation will do the opposite to “disengage” the sensor

  • Based upon contact/conductivity measurement: there is a small plate which measures surface conductivity. As soon as a sufficient amount of water hits the surface the NO/NC circuit is activated. But it requires very little evaporation to disengage, so maybe not the best choice for sprinklers control

According to your experience, which is the right sensor to pair with TIAO unit?

Thank you for your time :)


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Re: Rain Sensor for TIAO Smart Network Sprinkler Controller
« Reply #1 on: March 08, 2017, 12:33:27 PM »
Buy the cheapest one!