Bergerhoff Gauges to measure dust deposition
The Bergerhoff Gauge instrument is designed to measure dust deposition, usually quoted as mg/m2/day.
The collector is a 1.5 litre PET bottle with a neck diameter of 90 mm, so its area is 0.00636 m2.
If the gauge collect W mg in D days, the the deposition rate is given by:
Deposition = W/0.00636/D or [157.2*W]/D mg/m2/day
For example, if 14mg were collected in 28 days, the result would be:
Deposition: [157.2*14]/28 = 78.6 mg/m2/day
Contents of kit
Main assembly consisting of plastic-coated stand with removable bird guard and bottle holder
Overall height 2m and weight approximately 6kg
1.5-litre PET collecting bottle (aperture 93mm)
Spare 1.5-litre PET collecting bottle with cap, as above
General construction and aperture size in accordance with the German standard VDI 2199
Bird guard reduces risk of polluted samples from bird strikes
Removable upper section for easy transportation or replacement
1.5-litre bottle will accommodate 225mm rain.
Low-cost PET bottles have caps with a waterproof foil liner
Guy rope attachments for extra security and stability
Plastic coating of steel frame gives durability in hostile environments
Optional cylindrical sticky pad adaptor 100mm dia x 150mm high can be clamped to the stem, permitting directional sampling