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Light Meters for Photometry

Comprehensive range of solutions for the measurement of illuminance (lux), luminance (cd/m²), luminous flux (lumens) and luminous intensity (cd).

Handheld/portable light meters for measuring photopic and scotopic illuminance (lux)

Model Image Spectral function Typ. Range Minimum (*1) Typ. Range Maximum Input Optic / Size F.O.V. or Aperture Remark

X1 + VL-3704

 X1 Photopic; f1 ≤ 5% 0.25 lx 50 Mlx Diffuser / 7mmØ Cosine; f2 ≤ 3%

X1 + VL-3701

 X1 Photopic; f1 ≤ 3% 10 mlx 330 klx Diffuser / 7mmØ Cosine; f2 ≤ 1.5% Best selling DIN Class A illuminance meter suitable for measurement of white LEDs.

P-21 + VL-3701

 P-21 Photopic; f1 ≤ 3% 2 mlx 330 klx Diffuser / 7mmØ Cosine; f2 ≤ 1.5% Precision photometric detector suitable for low intensities. Simple interchange of detcetor heads.(1)

P-21 + VL-3707

 P-21 Photopic <100 μlx > 80,000 lx Diffuser / 30mmØ Cosine Very low light level photometer with wide dynamic range.

P-21 + VL-3705

 P-21 Scotopic; f1 ≤ 5% 25 mlx 5 Mlx Diffuser / 7mmØ Cosine; f2 ≤ 3% Scotopic illuminance (1)

P-2000 + VL-3701

 P-2000 Photopic; f1 ≤ 3% 2 mlx 330 klx Diffuser / 7mmØ Cosine; f2 ≤ 1.5% 2-channel meter for illuminance and additional UV or IR irradiance detector

P-9801 + 8x VL-3701

 P-9801 Photopic; f1 ≤ 3% 2 mlx 330 klx Diffuser / 7mmØ Cosine; f2 ≤ 1.5% 8-channel meter e.g. for uniformity measurements of flashlamps

P-9802 + 36x VL-3704

 P-9802 Photopic; f1 ≤ 5% 0.25 lx 50 Mlx Diffuser / 7mmØ Cosine; f2 ≤ 3% 36-channel measuring device e.g. for lamp aging test stands

(*1) Typ. Range Minimum SNR=50 100ms integration

See also: Spectral light meters for photometric and colorimetric measurements

MSC15

Handheld/portable light meters for measuring luminance (cd/m2)

Model Image Spectral function F.O.V. Typ. Range Minimum SNR=50 100ms integration Typ. Range Maximum Lens Remark

X1 + LDM-9901

 X1 V(λ), f1 ≤ 5 % 1° 0.2 cd/m² 40 Mcd/m² 22 mm Ø Notch and Bead Sight, measurement distance 40cm to infinity.

X1 + LDM-9901 + VL-3702

 X1 V(λ), f1 ≤ 5 % V(λ), f1 ≤ 6 % 1° Cosine; f2 ≤ 3% 0.2 cd/m² 10 mlx 40 Mcd/m² 330 klx 22 mm Ø Diffuser / 7mmØ Universal light meter for luminance and illuminance

P-9710 + LDM-9811 + PD-16-VL

 P-9710 V(λ), f1 ≤ 3 % V(λ), f1 ≤ 3 % V(λ), f1 ≤ 3 % 20' 1° 6° 1.7 cd/m² 0.17 cd/m² 5 mcd/m² 333 Mcd/m² 33 Mcd/m² 1 Mcd/m² 50 mm Ø achromat Precision luminance meter with adjustable focus

P-2000 + VL-3701 + VL-3701 with SRT-M37-L (1°)

 PD-9310 with SRT-M37-L V(λ), f1 ≤ 3 % 1° 4 cd/m² 830 Mcd/m² 22.4 mm Ø 2-channel light meter for the synchronous measurement of illuminance and luminance

P-9710 + VL-3701 + VL-3701 with SRT-M37-L (2°)

 VL-3701 with SRT-M37-L V(λ), f1 ≤ 3 % 2° 1 cd/m² 200 Mcd/m² 22.4 mm Ø No focus adjustment

P-9710 + VL-3701 + VL-3701 with SRT-M37-L (5°)

 VL-3701 with SRT-M37-L V(λ), f1 ≤ 3 % 5° 0.17 cd/m² 33 Mcd/m² 22.4 mm Ø No focus adjustment

Portable and benchtop light meters with integrating sphere for measuring luminous flux (lumens)

Model Image Spectral function Entrance port Integrating sphere Typ. Range Minimum SNR=50 100ms integration Typ. Range Maximum Remark

X1 + ISD-5-VL

 ISD-5-VL V(λ), f1 ≤ 5 % 12.7 mm Ø 50 mm Ø 0.2 mlm 8000 lm (*1) Compact luminous flux meter for cold light sources

P-21 + ISD-10-VL

 ISD-10-VL V(λ), f1 ≤ 5 % 15 mm Ø 100 mm Ø 0.1 mlm 20000 lm (*1) Precision luminous flux meter for cold light sources