Microtops II™ Sunphotometer

Delivery on all items in stock to two weeks
Every product is calibrated to NIST traceable standards before shipment.
1 year Standard Warranty.
Lifetime free telephone technical support.
Extended warranty plans available.

MICROTOPS II™ is a 5 channel hand-held sunphotometer for measuring aerosol optical thickness easily, accurately and dependably. Direct solar radiation at 5 discrete wavelengths is measured and stored. MICROTOPS II™ features an accuracy comparable to much larger and more expensive instruments. Optional GPS receiver facilitates field operation. Choose five of eight available WMO wavelength filters or specify up to five custom wavelengths.

The Microtops II™ Sunphotometer can measure aerosol optical depth and direct solar irradiance at all chosen wavelengths and water vapor column with 936 and either one or both 870 &1020 nm.

Applications:

Weather stations
Scientific and educational studies
Pollution monitoring
Photobiology
Environmental monitoring
Vicarious Calibration
irradiance based calibration of imaging sensors

Features:

> High accuracy. Highest grade filters are embedded into a solid cast aluminum housing which assures accurate, stable optical alignment. Low noise electronics and a 20 bit A/D converter allow high linearity, resolution and dynamic range.

> Ease of use. No computer knowledge is necessary to make measurements. Just aim the meter at the sun, align the image of the sun with the cross-hairs and push the button. In few seconds the measurement will be completed and the result stored in memory.

> Portability. A small hand-held device is all you need to perform measurements. No additional computer is necessary.

> Instantaneous results. The Aerosol optical thickness calculation algorithms are programmed in the MICROTOPS II™ and the final results of all stored scans can be conveniently viewed on the LCD. The raw data is also stored to allow retrospective adjustments of algorithms.

> Non-volatile memory. The raw data collected by the MICROTOPS II™, as well as calculated results are stored in non-volatile memory. Each data point is annotated with date, time, site coordinates, solar angle, altitude, pressure and temperature.

> Low cost. By implementing the latest technology, instrument cost has been brought well below that of comparable sunphotometers, without sacrificing accuracy or features.

> Computer interface. Connection to a PC through a serial interface (RS232) enables transfer of collected data. MICROTOPS™ Organizer, a Windows-based software automates data retrieval and archiving.

Service and Warranty:

Solar Light provides free telephone technical support for the life of our products. We also provide a 1 year Standard Warranty on all of our products covering parts and labor.
> Extended Warranty Plans are also available.

Application Notes & Technical Papers:

> A Comparison of the New Filter Ozonometer MICROTOPS II™ with Dobson and Brewer Spectrometers at Hohenpeissenberg (108K) U. Kohler - Reprint from Geophysical Research Letters

> A Comparison of Spectroradiometers to Radiometers for UV Radiation Measurements (43K) Daniel Berger

> Atmosphere Poster (363K) Presented at Quadrennial Ozone Symposium Charlottesville, Virginia, USA June 4-13 1992 Daniel Berger, Marian Morys

> Absolute Measurement and Modelization of 305.5 nm Direct Spectral Solar Radiation in Rosario, Argentina (43K) Work published in Spanish in "Avances en Energias Renovables y Medio Ambiente", Vol. 2, 11.53-11.56 (1998).

Specifications:

Optical Channels:
340   ± 0.3 nm,   2 nm FWHM
380   ± 0.4 nm,   4 nm FWHM
440   ± 1.5 nm, 10 nm FWHM
500   ± 1.5 nm, 10 nm FWHM
675   ± 1.5 nm, 10 nm FWHM
870   ± 1.5 nm, 10 nm FWHM
936   ± 1.5 nm, 10 nm FWHM
1020 ± 1.5 nm, 10 nm FWHM
Stray light:
340nm:   1E-6 λ<650nm; 1E-5 λ<1.0μm
380nm:   1E-6 λ<650nm; 1E-5 λ<1.0μm
440nm:   1E-5 λ<1.0μm
500nm:   1E-6 λ<1.1μm; 1E-5 λ<1.2μm
675nm:   1E-6 λ<1.1μm; 1E-5 λ<1.2μm
870nm:   1E-6 λ<1.1μm; 1E-5 λ<1.2μm
936nm:   1E-6 λ<1.1μm; 1E-5 λ<1.2μm
1020nm: 1E-6 λ<1.1nm; 1E-5 λ<1.2μm
Resolution 0.1W/m²
Dynamic range >300,000
Viewing angle 2.5°
Precision 1-2%
Non linearity max 0.002% FS
Operating environment 0 to 50°C, no precipitation
Computer interface RS-232C
Power source 4xAA Alkaline batteries
Weight 21 oz (600 grams)
Size 4"W x 8"H x 1.7"D (10x20x4.3 cm)

Ordering:

Standard

Microtops II™ Sunphotometer with 5 (selected) channels
Barometric pressure sensor
Hard-shell carrying case
Serial port cable
Instruction manual

Optional

Choice of filters include: 340, 380, 440, 500, 675, 870, 936 and 1020 nm
Water vapor column with 936 and either one or both 870 &1020 nm
GPS receiver for automatic location setup
Field carrying case
MICROTOPS™ data organizer software for Windows
Tripod adapter

Field Carrying Case Now Available!!!

A new carrying case for the MICROTOPS II™ has just arrived. It provides excellent protection and toting convenience, perfect if you’re traveling by car, ship, plane, or you’re in the field. Check out some of the features below:

Well padded, durable construction
Adjustable shoulder strap
Pouch for notepad, pencils, etc.
Velcro strap to attach fellow GPS carrying case

MICROTOPS II™ is fully operable while inside case