Versatile instrument can be configured for measuring total ozone column or total water vapor and aerosol optical thickness

 • Instantaneous results

 • Small, lightweight design for extreme portability

 • Simple operation, even for the novice user

MICROTOPS II is a hand-held instrument for measuring total ozone column easily, accurately and dependably. Direct solar ultraviolet radiation at three discrete wavelengths within the UV-B range is measured and stored. In sunphotometric configuration, the MICROTOPS II can measure total water vapor (936 nm) and aerosol optical thickness (AOT) at 1020 nanometers. MICROTOPS II features an accuracy comparable to much larger and more expensive instruments. Optional GPS receiver facilitates field operation. High-grade filters are embedded into a solid cast aluminum housing, assuring stable optical alignment. Low noise electronics and a 20-bit A/D converter provide high linearity, resolution and dynamic range. Measuring is as simple as aiming and aligning the meter and pushing a button. The ozone and total water vapor calculation algorithms are programmed into the MICROTOPS II and the final results of all stored scans can be conveniently viewed on the LCD. The raw data is also stored in the unit's non-volatile memory to allow retrospective adjustments of algorithms. Each data point is annotated with date, time, site coordinates, solar angle, altitude, pressure and temperature. Connection to a PC through a serial interface (RS232) enables transfer of collected data. Comes complete with internal barometric pressure sensor, serial interface cable, instruction manual and carrying case.

Max. Out of Band Transmission 305.5 nm: 10-7 Other: 10-6 Angle of View 2.5 degrees Dynamic Range 3 x 10-5 Accuracy Approx. 2% for Ozone and AOT Nonlinearity Max. 0.002% FS Operating Environment 0 to 50°C, no precipitation Computer Interface RS-232C Data Storage 800 Records Power Source (4) AA Alkaline Batteries (200 hours) Weight 21 oz. (600 grams) Size (W x L x D) 4" x 8" x 1.7" (10 x 20 x 4.3 cm)

Filter Specifications

305.5 nm 2 nm FWHM 312.5 nm 2 nm FWHM 320.0 nm 2 nm FWHM 340 nm 2 nm FWHM 380 nm 4 nm FWHM 440 nm 10 nm FWHM 500 nm 10 nm FWHM 675 nm 10 nm FWHM 870 nm 10 nm FWHM 936 nm 10 nm FWHM 1020 nm 10 nm FWHM

Filter Configurations Available

 • Ozone Monitor: 305.5, 312.5 and 320 nm optical channels

 • Ozone and Water Vapor Monitor: 305.5, 312.5, 320, 936 and 1020 nm optical channels

 • Sunphotometer: Any five of the following: 340, 380, 440, 500, 675, 870, 936 and 1020 nm

Thomas P/N# Manufacturer P/N# Short Description Price QTY 6294C60 MICROTOPS-D MICROTOPS II OZONOMETER $7,945.00 6294C55 SUNPHOTOMETER-D MICROTOPS II SUNPHOTOMETER, Five Channel $7,495.00