Observation of Raindrop Spectrum and Fog
Disdrometer Working Principle
How to measure raindrops
When the instrument works, the transmitter emits a stable red horizontal laser beam with 650 nm wavelength. The speed of light passes through the sampling area, which is detected by the laser receiver and converted into electrical signal.
The signal passes through a high-precision and stable amplification circuit, and is synchronously converted into digital signal by the A/D converter in the receiver. The signal is sent to the micro-processing controller and retrieved by the micro-processing controller.
The number of precipitation particles, particle size, falling speed and so on are obtained after sample and calculation. The statistical results are transmitted to the PC through RS-232 or RS-485 serial channel in real time.
Measurement of raindrop sizes:
When no precipitation particles fall through the laser beam, the output signal of the receiver is the largest. When the precipitation particles pass through the horizontal beam, they block part of the beam with their corresponding diameter, thus reducing the output signal.
We determine the diameter of precipitation particles by the size of signal reduction.
Disdrometer Technology Parameter
Particle size distribution
|32 level particle diameter size and 32 level descent velocity
|Drizzle, rain, snow, sleet, hail, etc., can provide the WMO 4688/4677 (SYNOP) 4678 (METAR) and the national code.
|±5% (liquid precipitation), ±20% (solid precipitation)
|RS232 / RS485 / SDI 12 /
Enclosure protection class
|Power supply mode
Can be used in coastal areas
ZDM100 Disdrometers Applications
what our clients say
By deploying six disdrometers in Taiwan, we can fully detect the impact of each rainfall process on soil erosion, which is of great significance. We owe it to the disdrometers from ZATA Company.
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ZDM100 Disdrometers FAQs
Here are your concerns
What Is Disdrometer?
A disdrometer is a laser instrument that measures the drop size distribution falling hydrometeors.
What Can A Disdrometer Measure?
- Droplet Spectrum of Precipitation
- Precipitation types
- Precipitation intensity
- Radar Reflectivity
- Horizontal visibility
What A Disdrometer Can Be Used For?
- Evaluation of Artificial Rainfall Efficiency
- Soil erosion Assessment
- Monitoring of Soil Momentum
- Rainfall Radar Coefficient Calibration
- Analysis of Regional Rainfall Patterns
- Analysis of Extremely Heavy Rainfall
What Is the Disdrometer Price?
Disdrometer is a professional outdoor rainfall analyzer, the price is still relatively high, about $8000-12000.
Can A Disdrometer Replace A Rain Gauge?
No.Their positioning is different. Conventional Tipping rain gauges are mainly used as wmo-approved main rainfall observation equipments, mainly used in the meteorological station system.
The disdrometer is a professional analytical instrument, mainly for scientific research users, independent deployment of the field.
Can A Disdrometer Replace a Visibility Sensor?
Disdrometer can monitor horizontal visibility information, but it is only a subsidiary function, and its monitoring range is small, so it can not replace professional visibility sensor.