CELESTRA SQM SERIES

SQM Sky Quality Meters

Wireless photometric sky-quality instruments for field measurement, professional astronomy and autonomous long-term monitoring.

Photometric SQMWi-Fi on every modelWireless data

CHOOSE YOUR SQM

Three instruments. One clear view of the night sky.

From portable measurements to autonomous zenith monitoring, each CELESTRA SQM is built around wireless operation.

PORTABLE

SQM Lite

Compact photometric sky-brightness measurement for portable field use.

Photometric SQMBattery PoweredWi-Fi

Explore SQM Lite →

PROFESSIONAL

SQM Pro

Photometric sky-brightness measurement with an integrated color touch display.

Photometric SQMTouch DisplayIntegrated BatteryWi-Fi

Explore SQM Pro →

AUTONOMOUS

SQM Zenit

Photometric SQM plus RGB/NIR monitoring for permanent outdoor installations.

SQM + RGB/NIRSolar ChargingExternal Wi-Fi Antenna

Explore SQM Zenit →

COMPARE SQM MODELS

Find the right instrument.

Capability	SQM Lite	SQM Pro	SQM Zenit
Photometric sky brightness	●	●	●
mag/arcsec² measurement	●	●	●
Wi-Fi / Web interface	●	●	●
Touch display	—	●	—
RGB / NIR monitoring	—	—	●
Power system	Battery	Integrated battery	Integrated battery
Solar charging	—	—	●
External Wi-Fi antenna	—	—	●
Continuous outdoor monitoring	—	—	●

WIRELESS WEB INTERFACE

A clear view of the night.

Explore the SQM Pro dashboard in an illustrative nighttime session, with sky-brightness readings, observing context and device information in one view.

SQM Pro web interface with illustrative nighttime readings: SQM 21.35 mag per square arcsecond and NIGHT mode — **SQM Pro interface shown.** Illustrative nighttime session; values are demonstration data, not live measurements. Available readings and controls vary by model and firmware.

PHOTOMETRIC SKY MEASUREMENT

Quantify the night sky.

Measure night-sky brightness in mag/arcsec² for astronomy, site assessment and light-pollution documentation.

SKY BRIGHTNESS21.36mag/arcsec²

WIRELESS BY DESIGN

Wi-Fi across the entire SQM family.

Lite, Pro and Zenit communicate wirelessly through their web interface. No wired data connection is required.

⌁WI-FI

SQM ZENIT

Built for autonomous monitoring.

Photometric SQM and RGB/NIR measurement combine with an integrated battery, solar charging and an external Wi-Fi antenna for continuous outdoor operation.

APPLICATIONS

Designed for serious sky-quality work.

Astronomy

Document observing conditions and night-sky brightness.

Dark-Sky Research

Build repeatable measurements for light-pollution studies.

Site Assessment

Compare sky quality across candidate observing locations.

Long-Term Monitoring

Use SQM Zenit for autonomous continuous outdoor observation.