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The OMC-210 rain gauge is used to measure rainfall, and is designed and constructed to work under extreme conditions with high precision and reliability. The instrument consists of a catchment funnel (inside diameter 22.57cm, 400cm2, and is in accordance with WMO recommendations.
The funnel is precision made to provide the correct area, and is shaped to avoid any loss of raindrops. It funnels rainwater to a gold plated double bucket which accumulates the water and which, when full, tips over and empties.
When the bucket tips, a reed contact mounted beside the bucket is activated by a magnet and generates a signal.
The bucket tips only when a precise amount of water has been collected. Two bucket sizes are available: 0.1 or 0.2mm. This relates to 4 or 8cc of rain respectively.
The water from the bucket passes through the stainless steel pipes and leaves the instrument via outlets in the base plate. These outlets are screened with stainless steel mesh to prevent the ingress of leaves, debris or insects.
If required, the rain gauge can be delivered with a film heater inside the housing. This rain gauge can be ordered under OMC-212. The heater is controlled by a temperature-controlled switch, which is activated at approximately 2 degrees C. | | 
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