Weather Monitoring — Anemometer & Rain Gauge

- Nov 9, 2026-

Weather stations need to count wind and rain accurately, in remote locations, on solar power, for years at a time. Reed switch pulse counting is the standard solution: each rotation or tip closes a sealed switch once, producing a pulse that a small processor turns into wind speed or rainfall. The switch draws no power, lasts for millions of operations, and works in any weather.

Cup Anemometer

A cup anemometer measures wind speed with three cups that spin in the wind. A magnet on the rotating shaft passes a reed switch once per revolution, and the pulse frequency gives the wind speed. The design is simple, consumes almost no power, and can run for years on a small solar panel in the field. Cup anemometers with reed switch pulse output are used in weather stations, agricultural meteorology, wind farms, and building environment monitoring, and they are often combined with a wind vane for direction and a rain gauge for precipitation in a single compact weather sensor kit.

Tipping-Bucket Rain Gauge

A tipping-bucket rain gauge is the standard method for measuring rainfall worldwide. Rainwater flows through a funnel into a small bucket; when the bucket has collected a fixed amount, typically 0.2 millimetres of rain, it tips over, empties, and triggers a reed switch once. Counting the tips gives the total rainfall. The mechanism is simple, accurate, and reliable, and it is used in automatic weather stations everywhere, often alongside a cup anemometer in a single weather sensor kit.

Remote and Solar-Powered Stations

Weather stations are often installed in remote fields, on rooftops, or on mountains, where there is no mains power and nobody visits for months. A reed switch pulse sensor needs no power to operate, so the whole station can run on a small solar panel and battery. The data is logged by a small processor and sent to a central server by radio or mobile network, giving meteorologists continuous wind and rainfall data from places that would otherwise be unmonitored.

Why Reed and Level Sensing

Reed switches are hermetically sealed against rain and dust, draw no power at rest, and survive millions of operations. They turn rotation and tipping into clean electrical pulses that any small processor can count, and they keep working through storms, frost, and heat. For weather monitoring, they are the proven, low-power choice.