====== OTT Parsivel 2 ======
//Mentor: S. Schnitt//

===== Principle =====
The OTT Parsivel 2 is a laser-based optical system for complete and reliable measurement of all types of precipitation. The size range of measurable liquid precipitation particles is from 0.2 ... 5 mm, for solid precipitation particles it is from 0.2 ... 25 mm. In the process, precipitation particles can have a velocity of from 0.2 ... 20 m/s. The precipitation particles are categorized as follows:
  * Drizzle
  * Drizzle with rain
  * Rain
  * Rain, drizzle with snow
  * Snow
  * Snow grains
  * Freezing rain
  * Hail

===== Instrument =====
{{ :instruments:parzivel:parzivel2.jpg?400 |}}\\
Current setup at [[http://www.fz-juelich.de/|Research Center Jülich]] on the roof of IEK-8:  [[http://www.ott.com/web/ott_de.nsf/id/pa_parsivel2_examples_e.html|OTT]] Parzivel 2.

===== Data =====
  * [[http://atmos.meteo.uni-koeln.de/~hatpro/dataBrowser/dataBrowser2.html?site=JOYCE&date=-1&UpperLeft=Parsivel-Pluvio-MRR_precipitation-rate&UpperRight=Parsivel-Pluvio-MRR_Accumulated_Precipitation|quicklook archive]]
   
===== History ====
^  Period  ^  Place  ^  Project  ^
| 08/2013 - today | [[http://www.fz-juelich.de/|Research Center Jülich]], Germany | [[http://www.tr32.de|TR32]] |

===== Specifications =====
^  Parameter  ^  Specification  ^ 
| Wavelength | 780 nm |
| Output power | 0,5mW|
| Beam dimension | W x D 180 x 30 mm |
| Measurement area | 54 cm², detection of border events |
| Particle size of liquid precipitation | 0.2 … 5 mm |
| Particle size of solid precipitation| 0.2 … 25 mm |
| Particle velocity  | 0.2 … 20 m/s |
| Rain rate Minimal intensity  | 0.001 mm/h drizzle/rain  |
| Rain rate Maximal intensity | 1,200 mm/h  |
| Prod. Temporal Resolution | 60 s  |
| Accuracy | ±5 % (liquid) / ±20 % (solid) |
| Dimensions (HxWxD) | 670 x 600 x 114 mm |
| Power supply | 10 ... 28V DC, reverse polarity protection |
| Current drawn |Electronics 65 mA at 24 V DC / Heating 2/4 A; 12/24 V DC |