LSI Lastem Rain Gauge to measure rainfall density

A Rain gauge is a device to measure liquid rainfall amount and intensity. The device is composed of a rain collector cone and a double-chamber tipping bucket connected to a magnet. The magnet operates one reed switch, which generates impulses that can be counted by external meters. Siphon versions (DQA230.1-231.1-230.3) are equipped with a siphon placed on the cone’s nozzle; it has function during heavy rain, to regulate the flow into the bascule permitting all the water to fall inside the tipping bucket. This solution gives its best results where the main need is the measurement of the total amount of rain over long periods. 

Class A rain gauges versions (DQA230-231-235-236) have the “Class A” class accuracy as described by the UNI EN 17277:2020 standard. It is the most accurate class for intensity measurement. For the Class A accuracy achievement, a correction formula on the data acquisition system is required.

Wide range of sensors to measure the quantity and intensity of precipitation. Our rain gauges are composed of a precipitation collection funnel that conveys the water into a double-tank receiver connected to a magnet. The magnet activates a read relay which generates a pulse that can be counted from an external counter.

Models are available equipped with a siphon positioned at the end of the collection funnel to regulate the flow of water in the event of heavy rainfall. This solution is ideal when the goal is to measure the total rainfall over a long period, not to measure the intensity.

Class A models are available which, following calibration in an internal laboratory, comply with the European standard UNI EN 17277: 2020, which defines the accuracy for measuring intensity and how to calibrate the instrument and correct the data.

Highlights

• Design made in compliance to WMO Class A (UNI11452:2012) accuracy over intensity (see PN);
• Syphone to adjust the water flow (see PN);
• Allumium made for rugged installations;
• Heated versions availability (see PN);
• Inpulse output and external optional devices for 4-20 mA or Modbus outputs (XLA003.1/003.2).

Available models

DQA230 

DQA231 

DQA230.1 

DQA231.1 

DQA235 

DQA236 

DQA230A.3

For more information please visit: https://www.lsi-lastem.com/PDF/MW9000/MW9000-ENG-18-Rain-tipping-bucket.pdf