Manufacturer: Unihedron
Product number: SQM-L

EUR 170,00


incl. 19 % VAT (DE)  
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excl. 6.95 € shipping costs (DE)  
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  • On stock





rating: 5.0 of 5
  • Details..
  • Technical data..
  • In the box..
Sky Quality Meter - measuring the brightness of the night sky
Within seconds you can determine the sky brightness with this compact device. No more "faintest star" estimates, no more being influenced by the observer´s shape of the day or eyesight.
A highly sensitive sensor measures the brightness of the night sky in a solid angle of about 20° (FWHM), concentrated by a lens, around the central axis; the determined value is displayed directly in magnitudes per arcsecond².

Possible useful applications are e.g. the objective comparison of different observation sites, the evaluation if a certain object can be observed/photographed this night, the documentation of progressing light pollution and many more.

The bandwidth of the sensor is in the visual range. The measurement itself is fully automatic after pressing the button and takes max. 8 seconds; in addition, the current temperature can be displayed to detect slight drifts due to temperature differences in different measurements.

Alternatively, the SQM is also available in the following versions:
SQM without lens with larger measurement angle.
SQM-LUwith lens and USB connector.
SQM-LE with lens and Ethernet connection

Dimensions:95 x 60 x 40 mm
Weight:105 g
Power supply:9V block battery (included)
Sky Quality Meter



Reviews

Written by Alex Freidinger
on 2023-12-26

"Erlaubt eine objektive beurteilung des Nachthimmels und dient der Vorbereitung einer Astrofotosession. Es gibt auch eine Entscheidungsgrundlage zusammen mit der Bewölkungsvorhersage überhaupt das Equipment aufzubauen."

Written by Vadim Pekhovskiy
on 2022-07-28

"Ich benutze dieses Gerät bei jeder Abfahrt, um zu verstehen, welcher Himmel heute ist und wie man ein Beobachtungsprogramm erstellt. Ich empfehle allen Liebhabern von Beobachtungen im Teleskop. Die Qualität des Geräts ist ausgezeichnet."

Written by Steffen Sachse
on 2022-01-11

"* Einfache Bedienung * Gut reproduzierbare Messungen * Zeigt feine Unterschiede, die man mit dem Auge nicht bewerten kann. Wegen der interessanten Ergebnisse lege ich mir wahrscheinlich noch ein Gerät mit Schnittstelle zu."

Written by Christoph Dombrowski
on 2021-12-06

"Einfache und schnelle Messung."

Written by DMITRY CHERKESOV
on 2021-09-10

"Quality is good."

Written by Thilo Mies
on 2021-06-21

"Artikel entspricht den Erwartungen und erfüllt seine Aufgabe bestens."

Written by Dumitru Hociung
on 2020-08-27

"All good, does what it says! "

Written by Juan Len
on 2020-06-25

"Funiona muy bien"

Written by Allen König
on 2020-04-09

"Benutzt wird das Gerät um sicher zu gehen, dass es dunkel genug ist um mit den Aufnahmen zu beginnen. Gerät ist einfach zu bedienen und die Qualität stimmt. ***"

Written by Philippe Haake
on 2017-01-24

"very good"

Written by Domingos Barbosa
on 2017-01-08

"Good product to check adequate sky brightness for astronomy observations."

Written by Herbert Wetter
on 2016-12-25

"Instrument zur Prüfung der Dunkelheit des Nachthimmels. Ideal für Hobbyastronomen."

Written by John Berrelkamp
on 2016-07-13

"Sowohl Ioptron Skytracker und SQM-L noch nicht benutzt weil es noch kein klarer nacht gegeben hat. Habe jedoch alles kontroliert ob es funktioniert und alles ist spitze."

Written by David-Ioan-Mihail Chifiriuc
on 2016-06-18

"I received the product in excellent condition after a prompt delivery. Great device, I use it to compare sky brightness at different sites for astrophotography related purposes and it does its job very well."

Written by Michael Opsölder
on 2016-05-10

"Der Standard in der Messung der Himmelshelligkeit."

Written by Ralf Schäfer
on 2016-02-16

"Das Sky Quality Meter tut was es soll. Es misst wie dunkel der Nachthimmel wirklich ist und das ganze in objektiven Zahlenwerten."

Written by Yue Chui
on 2016-02-03

"Some may think this is a luxury item but it has uses beyond astronomical observing. I used this device extensively to search for the darkest available sites, surveying the sky background brightness in relation to distance from zenith. My sites around zenith are generally 18.5 - 19.0 mag/ arcsec^2 without moon which are among the darkest available sites in Hong Kong. However, I also used it to survey human ecology and natural ecology purposes, as it can track light pollution in different areas and at different times of the night, I tested 13 mag/ arcsec^2 at 9pm and 16 mag/ arcsec^2 at 0am in a darkened spot near Hong Kong central business district, when the sky turn from blue-white to orange-red. It is also possible to put a polariser in front of the sensor and rotate it at different polarisation angle to track light pollution effects on migration birds, for example. I have even tested it in neon billboards and day light sky background. An important disadvantage is its fixed spectral range, and no accurate sensor spectral sensitivity curve can be found or easily tested. Still, this is a most useful device and very easy to carry around. The with lens version is greatly preferred as it allows different parts of the sky to be measured."