Amprobe LM631A Digital Light Meter

  • Measures wide range of light up to 20,000 fc or lux, front panel switchable
  • Accurate, high resolution of 0.01 fc/lux
  • Sensor dome has 45˝ attached cord
  • Built-in CIE spectrum curve for accurate human eye response
  • Peak hold and data hold
  • Large, 3-1/2 digit display with backlight feature


This instrument is a portable, easy-to-use, 3-1⁄ 2-digit, compact sized digital light meter designed for simple one-hand operation reading in lux or fc units.

Pressing the “peak” button for more than 2 seconds turns the backlight on and off. There is also an auxiliary output at the microphone jack (2.5 mm) connector that is active as long as the light meter is turned on.


Display 31⁄2-digit (LCD) with maximum reading of 1999
Overrange (OL) is displayed
Low battery indication Change batteries immediately
Measurement rate 2.5 times per second, nominal
Environment Indoor use, altitude up to 2000 m
Battery 4 pieces 1.5 V (AAA size) UM-4, R03
Visual light intensity ranges 20 lux, 200 lux, 2000 lux, 20000 lux

20 fc, 200 fc, 2000 fc, 20000 fc

Total accuracy For CIE standard illuminant A (2856K): ± ( 3 % rdg + 10 digits)


What’s Included

  • LM631A


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