Sentry ST522 chroma meter electrician tool

Precision Chroma Meter for Multi-Source Testing

The Sentry ST522 is a chroma meter built for technicians who need precise luminance and colour-temperature readings across multiple light sources. It meets CIE photopic spectral response requirements and provides correlated colour temperature data. A magnetic mount allows secure placement during measurements. This tool suits electricians and lighting professionals verifying LED and other lamp output.

Measurement Scope and Unit Selection

The instrument handles luminance and colour-coordinate measurement with a source-selection function for different lighting types. Users can switch between lux and foot-candle units to match project specifications. A custom reference value enables colour-difference comparisons against a known standard. The device covers the measurement needs described in the manufacturer highlights for the ST522 model.

Compatibility Checks Before Purchase

Confirm that the light sources you test fall within the meter’s supported categories and that the magnetic mount suits your typical fixture surfaces. Verify whether your workflow requires the specific source-selection capability of the ST522 rather than the single-source focus of the 520 or 520S variants. Ensure the lux and foot-candle range matches the luminance levels you encounter on site.