Model 540 Microtops II® Sunphotometer

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

• Model 540 Microtops II® Sunphotometer with 5 (selected) channels
• MICROTOPS® data organizer software for Windows
• 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
• 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

MICROTOPS II® SUNPHOTOMETER DATA FORMAT
(Some data columns omitted for clarity)

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