Luminance Meters

    Our cal-SPOT 401 is a calibrated, spot-measuring, brightness meter, designed for accuracy and ease of use.

    Using a silicon photodiode with photopic filter, the cal-SPOT 401 has human-eye response, and can be used with both eyes open. The cal-SPOT 401 features:

    • a one-degree measuring field
    • a 12-degree viewing field
    • a working distance of 8” to infinity
    • the ability to measure luminance from 0.1 to 400,000 cdm/m2

    Every cal-SPOT 401 is individually calibrated and comes with its own calibration certificate, certified to NIST/NRC standards.
    PCO’s line handheld light meters are sold worldwide under the COOKE Corporation brand.

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