Light Meter, Flicker, Illuminance and Light Colour Measurements

Manufacturer's part number :


Manufacturer Gigahertz Optik

Gigahertz Optik

Description :

The BTS256-EF is a high-quality light meter that is well suited for illuminance and luminous color measurements in all application areas thanks to its compact design, high-quality light sensor and precise cosine field of view function. Another special feature of the device is its ability to perform flicker measurements.

  • Quote and availability


  • Input optic: Diffuser window with 20mm diameter, cosine corrected field of view, F2 Error ≤3%
  • Silicon photodiode with photometric correction filter f1≤6% (f1 A(z) Correction ≤3%). Transimpedance amplifier with adjustable integration time (from 100µs to 6s). Seven(7) measurement ranges with offset correction. 16 Bit ADC.
  • Maximum measurable illuminance: ≥199,999 lx
  • Calibration uncertainty of photopic Illuminance +/-2.2%
  • Interface: USB
  • USB2; Mini USB Port
  • 100m within visual contact
  • Operating temperature range: 10°C to 30°C
  • Benefits

    Photometric and Colorimetric Measurement Capabilities:
  • Ep photopic illuminance
  • Es scotopic illuminance
  • Es/Ep ratio of night and daylight vision
  • EVE “Equivalent Visual Efficiency” factor
  • Ee irradiance
  • Eλ spectral irradiance
  • x, y CIE 1931 color coordinates
  • u‘, v‘ CIE 1976 color coordinates
  • CT color temperature
  • Δuv Deviation from the blackbody locus
  • λdom dominant wavelength
  • λp peak intensity wavelength
  • λ0,5 spectral half-width
  • Purity color purity
  • CRI Ra and R1 to R15 Color Rendering Index