Comparison Of Precipitation Measurement Technologies

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Comparison of Precipitation Measurement Applied sciences – Rain Gauges by Martha Khoury

Comparability of Precipitation Measurement Applied sciences – Rain Gauges by MARTHA KHOURY

Article Posted: 01/25/2021

Article Views: 479

This resource delineates the completely different rainfall measurement technologies with every climate station model obtainable from Columbia Weather Techniques.

Tipping Bucket Rain Gauge Technology: The tipping bucket gauge consists of a collector funnel with a knife edge that diverts water to a tipping bucket mechanism. The mechanism is so designed that one alternate tip of the bucket happens for each zero.01 inch of rainfall accumulation. A magnet is connected to the tipping bucket, which, as the bucket ideas, actuates a magnetic switch to sign the accumulation to the information logger.

Execs: Tipping buckets are the most broadly used rain sensors on the planet. The know-how has been round for a very long time and the mechanism is easy and mechanical.

This sensor is low price and very dependable.

Cons: The accuracy of the tipping bucket sensor is predicated on a particular rainfall price. Greater rainfall charges tend to introduce extra error in readings.

Inclined to error because of evaporation, splashing, and excessive wind.

For correct readings, the sensor have to be degree with no vibration.

Sensor ought to be checked frequently to make sure it is not clogged with particles.

Applications: Best used when rainfall accumulation is in comparison with different tipping bucket sensors.

Climate Station: The tipping bucket gauge is used with the Capricorn FLX and likewise interfaces with the digital channel on the Climate MicroServer for use with any other mannequin. See below for the Pulsar 601 with Tipping Bucket Raingauge.

Capricorn FLX Tipping Bucket Raingauge Specs:

Resolution: zero.01”

Collection Diameter: 6”

Heating choice is available to measure snowfall as rain accumulation.

Pulsar 601 Tipping Bucket Raingauge Specifications:

Resolution: zero.2mm

Accuracy: ±2%

Maximum intensity: a hundred and forty four mm/hr

Impact Sensor (Orion) Know-how: The rainfall measurement relies on an influence sensor, which detects the impression of particular person rain drops. The alerts exerting from the impacts are proportional to the amount of the drops. Hence, the sign from each drop will be converted directly to the collected rainfall. Due to the measurement technique, flooding, clogging in addition to wetting and evaporation losses in rain measurement are eliminated.

Professionals: Requires no maintenance. Correct below heavy rainfall charges. Just isn’t affected by clogging and evaporation.

Able to detect hail.

Applications: Ideal for climate station installation that has low maintenance requirements.

Weather Station: This sensor is on the market with the Orion climate station.


Collection Area: 60 cm2 Accuracy: ±5% (spatial variations might exist) Resolution zero.001 in. (0.0254 mm)

Doppler Radar Sensor (Pulsar one hundred, 600, 700, 800) Expertise: Precipitation is measured by a 24 GHz Doppler radar which measures the drop pace of a person drop of rain or snow. Precipitation quantity and intensity are calculated from the correlation between drop measurement and pace. The Doppler radar sensor is ready to sense (measure) rain drops measurement between 0.three mm and mm.

Execs: The sensor is quick responding with a decision of 0.0004 inches (0.01 mm).

Able to differentiate between snow and rain.

Cons: The accuracy decreases when drop measurement is exterior of the measurement vary.

Purposes: The sensor is good for purposes that require high decision with a purpose to report start of rainfall. For instance, the tipping bucket rain gauge won’t report rainfall until it reaches 0.01” accumulation. The Doppler radar sensor will report rainfall when accumulation reaches zero.0004”.

Weather Station: This sensor is accessible with the Pulsar 600 weather station.


Measuring Range: Drop measurement zero.three – 5mm Resolution: zero.0004” (zero.01 mm) Reproducibility: typ>90% Sort: Rain / Snow

Optical Sensor (Magellan MX600) Expertise: An built-in optical rain gauge that routinely senses water hitting its outdoors surface and offers measurements based mostly on the scale and number of drops. Algorithms interpret this information and simulate the output of a tipping bucket rain gauge.

Professionals: Gives rain measurement for systems that require a transmitter with GPS and electronics compass.

The optical rain gauge has no shifting elements related to tipping bucket gauges. It’s largely used in purposes the place rain accumulation accuracy will not be important.

Cons: Low accuracy and backbone.

Applications: Best used for cellular and moveable functions for basic monitoring akin to recording precipitation occasion and duration. Utility reminiscent of vehicle track testing, power transmission line monitoring, and plane testing.

Weather Station: This sensor is offered with the Magellan MX600 climate station with GPS.


Decision: zero.01inch Vary: 0 to >12 inches/hr Repeatability: three%

Contact Columbia Climate Programs for details about which expertise is finest on your precipitation monitoring utility.

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