A rain sensor is an automated device that shuts off your lawn irrigation system every time it rains. It is a relatively cheap device that can save up to 45% of your water bills, help protect the environment and conserve water.
A rain sensor is mounted outdoors away from trees and roof overhangs so that it can collect rainwater without obstruction. A rain sensor can either be wired or wirelessly attached to a lawn irrigation system.
How a Rain Sensor Works
There are three ways in which a rain sensor works. The first is by using a collection cup where rainwater is collected and weighed. The weight of the rainwater in the collection cup will then break the electrical connection to the pump or sprinkler valves of your lawn irrigation system. The second way is a variation of the first where instead of weighing the amount of water in the collection cup, an electrode is used to measure the amount of rainwater. The third way is by using an expansion disc made of cork. When enough rain hits the cork, it expands and triggers the break mechanism of the rain sensor preventing electricity from running into your lawn irrigation system.
Below are the five advantages of using a rain sensor.
1. Conserve Water
There is a lot of water that you can save by using a rain sensor. By automatically turning off your lawn irrigation system every time it rains, the conserved water can be used in other essential purposes such as fighting fire.
2. Prevent Disease Damage and Nutrient Loss
Over-watering prevents the roots of your plants from reaching deep into the ground making your plants vulnerable to disease. Over-watering is also one of the major causes of nutrient loss in plants as excessive watering washes away the nutrients of the soil leaving your plants weak and unhealthy.
3. Save Money on Fertilizer
A rain sensor prevents you from overwatering your plants and lawn. When a plant is overwatered, the nutrients from the turf wash away into the drainage system. You have to compensate by adding more fertilizers to your lawn and plants. This means spending more money on fertilizers. With a rain sensor that effectively prevents your lawn irrigation system from overwatering your lawn and plants, your garden turf will remain to be an ideal environment for your plants in accordance with the fertilizer that you are using.
4. Increase the Life-span of your Irrigation System
Using a rain sensor prevents unnecessary wear and tear of your lawn irrigation system since it minimizes the amount of time that your lawn irrigation is in operation. This is especially useful during the rainy season where rain can unpredictably come and go.
5. Prevent Groundwater and Waterways Pollution
A lawn irrigation system equipped with a rain sensor minimizes wasteful runoff such as pesticides, motor oil, fertilizer, pet waste and sediments from reaching your waterways. It also minimizes garden pollutants such as herbicides and fertilizers from getting into your groundwater system.