20cm diameter ADM7 small evaporating dish meteorological instrument

20cm diameter ADM7 smallEvaporative dish meteorological instrument

The small evaporator has a diameter of20cm, 10cm highcopperThe Circlebasin，The mouth of the device is embedded with a blade shaped copper ring that is straight inside and slanted outside45 °, with a perfectly round mouth and a small spout for pouring water under the edge of the mouth，To prevent birds and animals from drinking water, a metal wire mesh ring is placed on the upper part of the mouth, which extends outward in a trumpet shape.When measuringinstrumentPlace it on the shelf with the mouth off the ground70 centimeters, add a certain amount of water daily, every 24 hourshourAfterwards, measure the remaining water using a measuring cup, and the amount of water reduced is the evaporation rate. Add it to the evaporating dish every dayA 2cm deep water layer, pour the remaining water into a measuring cup at night and measure the remaining water depth. Subtracting the remaining water depth from 20 centimeters is the evaporation rate for that day. If there is rain on that day, the remaining water will also deduct the amount of precipitation for that day. This is why the diameter and height of the evaporating dish from the ground must be consistent with the rain gauge. Otherwise, the two cannot be simply subtracted.

A small evaporator is an instrument used to measure the evaporation of water in the atmosphere at a certain time interval.The equipment bracket and on-site installation and fixation meet the requirements of the "Water Surface Evaporation Observation Specification"（SL630-2013) requirements.The main components of this product are made of brass plates. Compact structure, beautiful appearance, sturdy and durable, strong practicality, suitable for relevant departments such as hydrological and meteorological stations.

Technical Specifications：

Installation and use:

1. install——The evaporating dish should be placed in an open and flat area in the open air, and should be able to receive sunlight all day long. The mouth edge should be placed horizontally, about from the ground700Millimeter high, a wooden pillar can be erected and nailed onto a shelf or a brick pier can be built to securely place the evaporating dish on it.

2. use——Observe once a day at the designated time and use a measuring cup (caliber) the day before200Millimeter rain gauge specialized measuring cup for holding water20Millimeters, injected into the dish, through24After hours, at the designated observation time for today, pour the remaining water in the dish back into the measuring cup and measure the amount lost, which is the evaporation rate for today. After observation, replace with clean water and fill with a cup20Inject millimeter water into the evaporating dish to keep it inside20Millimeter water volume.

If there is rainwater falling into the dish, the actual evaporation amount should be obtained by subtracting the precipitation amount from the observation record.

If there is ice in the dish during the freezing season, the weighing method should be used. Method:——Inject into the dish20Measure the weight (in grams) of millimeter clear water on a platform scale24After an hour, weigh it again, and the difference between the two weights is the actual evaporation rate (in millimeters)

Initial weighing (grams)-Weigh again (grams)

Evaporation rate (mm)=——————————————

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20cm diameter ADM7 smallEvaporative dish meteorological instrument