Unihedron

A USB enabled vector data-logging light meter for night-time sky brightness monitoring!

An affordable meter for continual, connected or autonomous data-logging to measure sky brightness for astronomers and light pollution investigators.
The "Sky Quali

A USB enabled data-logging light meter for night-time sky brightness monitoring!

The filter adaptor is screwed on to the back of the SQM (choose model below) and the filter (not included, choose size below) is screwed into the adaptor.

A USB SQM model for night-time sky brightness monitoring!

An RS232 SQM model for night-time sky brightness monitoring!

An ethernet-enabled SQM model for night-time sky brightness monitoring!

A source of broad spectrum (white), blue, green, yellow, orange/IR, and red light for optics demonstrations and experiments.

Battery holder with built in voltage regulator to provide 5V for USB connection.

The Unihedron CapSelector provides an inexpensive way to tune a VLF loop over a wide range (120 - 5510 pF) of capacitances.

An affordable meter for measuring sky brightness for astronomers!

This Window mounting bracket is used for moving light pollution studies while a "connected" meter and GPS are attached to a computer using UDM logging continuously with the GPS option enabled described here.

This housing design is made to protect the SQM-LE/LU from normal outdoor conditions including weather and insects.

This unit mounts to the sunny side of the SQM-H housing and charges up the 4xAA NiMH batteries (included) so that the SQM-LU-DL can operate throughout the nighttime. It replaces the original SQM-LU-DL battery pack.

This adaptor kit was designed specifically for the SQM-L so that the battery compartment is accessible with the adaptor in place.

A standard diffraction grating used to separate white light into its spectrum.

An affordable meter for measuring sky brightness for astronomers!

This housing design is made to protect the SQM-LE/LU from normal outdoor conditions including weather and insects.