LiveZilla Live Chat Software
Register/Login Login Contact UsContacts BlogBlog
Cart Items : 0 | Cart Total : R0
USA Categories
Site Security
Industrial & Scientific > Test, Measure & Inspect > Airflow & Air Quality > Indoor Air Quality Meters > B005CQK3SG
  1. Unihedron Sky Quality Meter (SQM)
    Unihedron Sky Quality Meter (SQM)
    Unihedron Sky Quality Meter (SQM)
    Image(s) provided for illustrative purposes and may differ from the actual product
  2. Unihedron Sky Quality Meter (SQM)

    Delivery: 10-20 Working Days
    Customer Ratings (7 reviews)

Product Description

  • Affordable meter for measuring night sky brightness for astronomers
  • Full Width Half Maximum (FWHM) ~42°
  • Size 3.6 x 2.6 x 1.1 in.; 9v battery included
  • Compare the sky brightness at different sites quantitatively
  • Infrared blocking filter restricts measurement to visual bandpass
Additional Information

An affordable meter for measuring sky brightness for astronomers! The "Sky Quality Meter" measures the brightness of the night sky in magnitudes per square arcsecond. Designed by Dr. Doug Welch and Anthony Tekatch, the Unihedron Sky Quality Meter offers unprecedented sensitivity in a handheld meter. Uses: -Find out how good the night or site REALLY is. -Compare the sky brightness at different sites quantitatively. -Document the evolution of light pollution in your area. -Set planetarium dome illumination to mimic the skies people are likely to experience elsewhere in the city. -Monitor sky brightness through the night, night-to-night, and year-to-year. -Determine which nights show the greatest promise for finding the 'faintest fuzzies'! -Calibrate the effect of sky brightness on qualitative measures such as the Bortle Scale. -Investigate how sky brightness correlates with the solar cycle and month-to-month sunspot activity. -Help provide local ground truth for future sky brightness prediction with the Clear Sky Clock. -CCD users can make a correlation between the SQM reading and when the background reaches some ADC level. Features: -Audible signal while measurement is in progress. -Sky brightness displayed in visual magnitudes per square arcsecond. -Infrared blocking filter restricts measurement to visual bandpass. -Temperature in both Celsius and Fahrenheit as well as model number and serial number can be displayed with different button press sequence. - Precision readings at even the darkest sites. - Power-saving features designed in for maximum battery life. - Reverse battery protection. Specifications: -The Half Width Half Maximum (HWHM) of the angular sensitivity is ~42° -Operates from 9V battery (included). -Size 3.8 x 2.4 x 1 in. -Maximum light sampling time: 80 seconds. -Specifications are subject to change without notice.


Most Helpful Customer Reviews

For those astronomers who need to know their sky quality this Unihedron meter will keep you precise for all astronomical work...viewing, astro photography as well as video photography. Extremely easy to use, highly recommended!
Please Note

The authorised South African distributor of this product is under no obligation to honour the manufacture's guarantees/warranties or to provide after-sales service.

Please note that this item is imported from the USA, and is designed to be used in the USA. In addition, if the unit is powered it will come with a US plug and an adapter/transformer may be required. Please click here for more information on power requirements, or check with us if you are unsure or need any assistance!

Please also note that certain items cannot be imported, these include Alcohol, Animals, Batteries, Flammable Materials, Currency, Food, Furs, Chemicals, Explosives, Medications, Plants, Seeds, Supplements, Pressurized Cans, Tactical Equipment, Vitamins, Weaponry and Weaponry Accessories. In these cases, the item and information is displayed for reference purposes only. If you are not sure if we are permitted to bring an item, please send us an e-mail with a link to the item to confirm.

Please also ensure that you are ordering the correct item for your particular application as returns to the USA are costly. Product reviews are also provided for most of our items, which can give you a good idea for possible things to look out for and the quality of the item. By clicking Add to Cart, you are confirming that the item is correct and you accept the conditions listed here.