What are the types of rain gauges?

Rain gauge is a professional instrument used for rainfall observation and recording, which is widely used in agricultural meteorological observation, - in general, most of the rain gauges use meters as the measurement unit. In the field of agriculture, the use of this instrument to strengthen the observation of rainfall can guide the majority of farmers to carry out scientific meteorological disaster prevention, strengthen anti-morning irrigation work, etc., in reducing disaster losses, while steadily improving the yield and quality of food cultivation. So in the family of rain gauges, what kinds of rain gauges does it have?

1. Tipping buckettype rain gauge Tipping bucket type rain gauge is a telemetry instrument composed of inductor and signal recorder, the inductor is composed of water carrier, upper bucket, measuring bucket, counting bucket, reed switch, etc; recorder is composed of counter, recorder, self-recording clock, control circuit board, etc.

Its working principle is: the rainwater from the uppermost water-bearing mouth into the water-bearing, falling into the water receiving funnel, through the funnel mouth into the tipping bucket, when the amount of water reaches a certain height (such as 0.01 mm), the tipping bucket out of balance tipping over. Each time the bucket tilts over, the switch turns on the circuit and sends a pulse signal to the recorder, which controls the self-recording pen to record the rainfall amount, and so on.

2.Siphon type rain gauge Siphon type rain gauge can continuously record the amount of liquid precipitation and precipitation hours, from the precipitation record can also understand the intensity of precipitation. The rain gauge is mainly composed of water carrier, float chamber, self-recording clock and shell.

The working principle is: the rainwater from the uppermost water bearing mouth into the water bearing, by the lower funnel collection, lead to the float chamber. Sub is composed of a cylinder containing floats, floats with the increase in rainwater injection and rise, and drive the self-remembering pen up. Self-registering clock fixed in the seat plate, the cylinder by the clock machine to promote the role of rotary movement, so that the recorder pen in the cylinder around the recorder paper to draw the curve.

The vertical coordinate of the recording paper records the amount of rainfall, and the horizontal coordinate is driven by the self-registering clock, which indicates the time. When the amount of rain reaches a certain height (for example, 10 mm), the water surface inside the float chamber rises to the siphon tube connected with the float chamber, leading to the start of the siphon, which quickly discharges the rainwater inside the float chamber into the water storage bottle, while the self-recording pen falls vertically to the zero line position on the recording paper, and again starts the inflow of rainwater and rises, so that the round trip continues to record the rainfall process.

3. Weighing type self-registering rain gauge Weighing self-registering rain gauges can continuously record the weight of precipitation on and stored in the rain catcher cup. The recording method can be a mechanical clockwork device or a balance hammer system, which records the weight of the total precipitation as it is, and is capable of recording snow, hail and mixed rain and snow precipitation.

The rain gauge is generally used to continuously measure and record the amount of rainfall, rainfall calendar time and rainfall intensity, and is suitable for meteorological stations, hydrological stations, environmental protection, flood control and drainage, as well as agriculture and forestry to measure precipitation.