Unihedron Sky Quality Meter Base Handheld Unit
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. Unprecedented sensitivity in a handheld meter!
Designed by Dr. Doug Welch and Anthony Tekatch
- 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.f
- 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.
- 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.
Free Shipping Everyday to Canada!
(Except to Yukon, Northwest Territories, Nunavut, and other areas deemed as "remote" by Canada Post or Purolator)
On orders above $100
Orders are processed: Monday – Friday from 8am – 3:30pm MT
(Public Holidays Excluded)
Order Confirmation: After placing an order, you will receive an order confirmation by e-mail. This means we’ve received your order in our system and have pre-authorized your credit card for the purchase. If your item is back-ordered or otherwise unavailable, we will void the pre-authorization charge and contact you to inform you by e-mail. If your item(s) are available for immediate shipment (within 7 business days unless noted longer on the product page), we will process the charges and submit the order for shipment.
Tracking Numbers will be sent to your email once your order has shipped.
In some cases, we may need to contact you before your order can be shipped. To ensure there is no delay, please respond to any email/phone call from our Customer Service team.
We proudly use the following Shipping Methods and will choose the best available in terms of price and delivery times at the time of shipment.
Price Guarantee Policy:
We want to ensure our customers get the products they need at the best possible price. If you find another online store that offers a lower price than us within one month of your purchase date, please let us know and we will refund your original payment for the difference.
To request your partial refund simply e-mail us a link to the same product on our competitors website within one month from the date of your order and we will process the credit accordingly.
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- You must purchase the item from our website before requesting your Price Match Guarantee
- Promotions such as rebates and buy one, get one free offers are not eligible
- The item must be in stock on the competitors website
- The competitor must be an online store, they may not have a retail location
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- The competitor must be an Authorized Retailer for the product in question
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