This is a collaborative project involving both science and engineering. The objective is to build a Do-It-Yourself Ozonometer which normally retails for $8,000. The device measures the total stratospheric ozone column in Dobson Units (DU) and will be used for both classes and research.

Fig. 1: Total ozone column - global average = 300 DU, 1 DU = 2.7 x 10¹⁶ molecules cm^-2

• Excel price list
• Filters: 305 to 310 nm for the short wavelength and 325 to 330 nm for the long wavelength. Filter diameter = 12.5 mm (0.5 in)
  [The bandpass of filters used to detect ozone must be less than the 10 nm which is standard for most interference filters. The TOPS-1 and TOPS-2 filters have a bandpass of 5 nm. If you cannot find filters with a 5 nm or less bandpass, you can reduce the bandpass of a 10 nm filter by stacking two of them.]

STATUS

I am currently searching for interest from engineering faculty and the cheapest filter option and parts.

REFERENCES

General

• Science Probe! magazine in November 1992

LINKS

• The Citizen Scientist - http://www.sas.org/tcs/weeklyIssues_2007/2007-02-02/project1/index.html
• Andover UV Bandpass Filters - http://www.andovercorp.com/Web_store/Standard_BP/Std_BP_300nm.php
• Barr Asociates - http://www.barrassociates.com
• Ozonometer - http://solarlight.com/products/mtops.html
• Sun and Sky - http://www.sunandsky.org