Hioki FT3424 Light Meter with Broad Coverage from Low to High Illuminance

• FT3424 Light meter
• Compatible with LED lighting
• Complies with DIN 5032-7:1985 class B and JIS C 1609-1:2006 general AA class
• Timer hold function lets you make measurements in remote locations while avoiding the effects of shadows and reflections
• Save up to 99 measured values in the instrument’s internal memory and transfer them to a computer later for improved work efficiency

The FT3424 is a light meter designed for an extensive range of applications involving illumination equipment, lighting work and facility management. Capable of testing even LED lighting, the FT3424 provides five measurement ranges, 20 lx to 200,000 lx, to support a wide range of luminance levels.

Relative Spectral Response Characteristics in the Visible Spectrum
Human perception of brightness ranges from 380 nm to 780 nm in the wavelength and is the maximum at 555 nm. The lnternational Commission on Illumination (CIE) has established comparative standards for luminosity, setting the maximum perception for 1 and indicating the amount of perception of each wavelength by the relative value, and calculating the average of many people. In this instrument, the relative spectral response characteristics are close to the comparative standards for luminosity.

Angled Incident Light Characteristics
It is known that the luminance is proportional to the cosine of the incident angle of light (the cosine law).In this instrument, the shape of the light sensor, hook etc. is so made that it can follow the cosine law closely.