Water Monitoring System Model ERG-200/201 (MTI.EWS.ER.M-ERG-200/201) Inside each rain gage is a balanced tipping bucket mechanism with a magnet and switch assembly. Collection of rain is through a 200 mm diameter catchment through debris filtering screen. A funnel inside the rain gage feeds collected rain water into one of the two buckets. As soon as the preset amount of water has been collected in the bucket, it tips the other way, automatically emptying the water and positioning the other bucket for collecting rainfall. The measured water exits through drain tubes provided at the base of the rain gage. The tipping bucket mechanism activates a sealed magnet sensitive switch that produces a contact closure for each 0.2/0.5 mm of rainfall. Two adjustable screws provide calibration of buckets by changing position of the bucket stop point. High vertical sidewalls of the model ERG-200/201prevent splash-out of rain from the catchment thus resulting in better accuracy. Each rain gage is individually calibrated for optimum accuracy. Three adjustable legs allow the rain gage to be fastened permanently onto a platform or deck using standard fasteners.