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Model DRA-12 -Automatic Precipitation Sampler
The DIGITEL DRA-12 is a microprocessor controlled automatic sampler for the sampling of wet depositions (rain, snow) for later assessment and analysis in the laboratory.. The device is mounted in an air-conditioned compact field housing. The collection funnel, which is coated with Teflon, has a surface of 500 cm².(d = 252 mm). When it’s dry, the collection funnel is closed by a lid. This avoids contamination of the funnel with leaves, dust etc. A rain sensor opens the lid, the precipitation accumulates in the funnel and flows via a short vertical Teflon pipeline directly into the current bottle. Snow and ice rain are defrosted by an integrated heating, which also prevents the freezing of the funnel lid. The turnable bottle plate contains 12 sampling bottles with 1l each or 32 sampling bottles with 250ml each. The exchange of the bottle takes place automatically, time and/or event controlled. When a bottle is full, it is automatically exchanged by a new one.
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The air-conditioned bottle chamber ensures the storage of of the precipitation samples at a constant temperature.
All events (precipitation begin/end, bottle exchange etc.) are logged. The wet-only sampler is completely remote controlled via a RS232C interface.
- Light weight but robust and weather proof
- Low energy consumption
- Low maintenance cost
- Easy programming with touchscreen
- Flexible software to meet any sampling schedule
- Automatic bottle change when bottles are full (capacitive sensor), at a preselected time (e.g. daily samples) or after a user selected rain duration
- Precipitation-controlled funnel lid with selectable opening and closing times
Sampling
- Bottle changer configuration: 32x250ml or 12x1000ml
- Capacity level sensor (liquid level sensor) for automatic bottle exchange of full sampling bottles
- Integrated cooling compressor to control temperature of collection room,
temperature can be set (e.g. 4°C+-2°C) - delay time of instrument opening lid yes, user settable, 1s-60min
- delay time of instrument closing lid yes, user settable, 1s-60min
- precipitation sensor heating as a standard
- Funnel opening (internal diameter (mm)) /sampling area 252mm +- 1mm / 500cm2
- Average precipitation amount for initial monitoring 0.01mm
- Application range: -20° to 50°C; 0 % to 100 % RH, heating option for temperatures <0°C
Time programs
- Work, Pause (0 to 59’999 minutes each)
- start time adjustable, using date and time
Operating Data
- Power supply: 230 V, 50 / 60 Hz, max. 300 VA
- Heating:
- Noise level <35dB at 1m
Interfaces
- RS232C, USB, Ethernet, RS485
Materials
- Coated aluminium
- Sampling line: PTFE coated aluminium / PTFE
- 60mm XPS insulation
- Bottles: PE, other materials (glass) on request
Dimensions
- 640 x 640 x 2200 mm, 65 kg
- Height of inlet from ground (m): As a standard 2.16m, available 1.5-2.5m
- programmable temperature controlled funnel heating
- programmable temperature controlled lid heating
- programmable temperature controlled roof heating