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Luminance Meter BM-9A

Successor model of Luminance meter BM-9.
Detector unit are detachable, light weight, and small size instrument.


New BM-9A is small, compact, and handy Luminance meter.
You can select detector units from three models, which have difference measurement angles, and you can use the BM-9A for variety purpose.
Detector unit and Main body are detachable, so the BM-9A is suited for integrating measurement systems and using in production lines.


■ Handy, Low price, Multifunction.
■ Detector unit can be selectable from three types and can be interchangeable.
■ The BM-9A can connect to PC via USB cable.
So the BM-9A used in production lines, and measurement system.
■ Keyboard unit enable you to enter correction factors and conduct difference measurement.

Principal use

■ Measurement of luminance for LCD,PDP, OLED,LED, CCFL.
■ Measurement of transmittance of Polarizing plate, films, and filters.
■ Measurement of luminance in Road and Road tunnel illumination light.
■ Measurement for sign illumination lights in airports and see port.
■ Measurement for medical illumination and electric karte, and Schaukasten.
■ Measurement of uniformity of License plate.
■ Measurement for variety illumination facilities.
■ Measurement of luminance of the leading block for visually handicapped.
■ Measurement of reflection light from floor.


Display unit BM-9AC
Head type BM-9A20D BM-9A10D BM-9A02D
Measurement angle 0.2°
Optical system Objective lens: f = 36mm F=2.5、Eypiece lens : View filed 5°
Photo detector Silicon photo diode
Spectral sensitivity 6% or less(*1) ※JIS C 1609-1 2006
Measurement distance 350mm~∞
Minimum Measurement area (with AL-13) 9.5mmφ
0.95mmφ (0.10mmφ)
Range of illuminance 0.01 – 280,000cd/m2 0.1 – 2,800,000cd/m2 1 – 28,000,000cd/m2
Accuracy in luminance(*2) ±2% of rdg. ±2 digit (0.1cd/m2 more) ±2% of rdg. ±2 digit (1.0cd/m2 more) ±2% of rdg. ±2 digit (10cd/m2 more)
Display 6digit LCD
Interface USB
Analog voltage output 0 – 3Vmax
Power supply Size AA dry-cell battery×2 or dedicated adopter(option)
Use conditions Temperature:0 – +40℃、 Humidity:85% R.H. or less
(No condensation)
Outer dimensions (W×D×H) 108×191×57mm
(Dusplay unit: 65×131×28mm、 Head unit: 108×60×57mm)
Weight 350g (*3) (Display unit: 130g (*3)、Head unit: 220g)

(*1)Error from spectral luminous efficiency of the standard.
(*2) For standard illuminance A, Auto range, 23℃±3℃.
(*3) Non-dry cell battery.

Measurement area (Diameter Φ)

Measurement area Measurement distance[mm] (*)
350 400 600 800 1000 3000 5000
9.5 11.2 18.2 25.3 32.3 102 173
4.7 5.6 9.1 12.7 16.2 51.1 86.1
0.2° 0.95 1.12 1.82 2.53 3.23 10.2 17.3

(*)The measurement distance is the distance from the tip of the metal fixture on the instrument of the objective lens.


■ Attachment lens : AL-13
■ Reference white board : WS-3
■ Tripod : Tripod 5N
■ Extension Cable : 2m、5、10、20、30m
■ AC adapter : ZV-42

Video Manual

75-1, Hasunuma-cho, Itabashi-ku, Tokyo, 174-8580, Japan
TEL: +81-3-3558-2642, FAX: +81-3-5392-4992
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