The lux (symbol: lx) is the SI unit of illuminance and luminous emittance, measuring luminous flux per unit area. It is equal to one lumen per square metre. In photometry, this is used as a measure of the intensity, as perceived by the human eye, of light that hits or passes through a surface. It is analogous to the radiometric unit watts per square metre, but with the power at each wavelength weighted according to the luminosity function, a standardized model of human visual brightness perception. In English, "lux" is used in both singular and plural.[1]
Sub Categories
* -P circuit, 2,000/20,000/50,000 Lux. * Max., Min., Memory recall button. * Lux, Ft-candle, % values, wide range. * 4 light type select by push button. * Size : 180 x 72 x 32 mm.
Luminous Flux Meter 4-digit LCD reading. Spectral Sensitivity close to CIE photopic Curve. Auto ranging from 0.05 to 7000 lumens. Accurate and Instant response. Data Hold function. Data memory and read function.
Spectrum of photo sensor meets C.I.E. photopic curve V( l ) 16000 Records Data logging capacity 20/200/2000/20000 Lux, 20/200/2000/20000 Fc
- 3½ digits LCD with maximum reading 2000. - Overload indication. - Low battery indication. - According to JISC1609:1993 and CNS 5119 general A class specifications. - Spectral response close to CIE luminous spectral efficiency. - Measuring intensities of illumination in unit of Lux or Foot-candle. - Measuring lights source include all visible range. - Cosine angular corrected.
Dual Display, 4-digit LCD reading. Spectral Sensitivity close to CIE photopic Curve. Measuring Levels Ranging 0.01 to 1999k cd/m2, 0.001 to 580.0k fL, Autoranging 7 step. Accurate and Instant response. Luminance ratio A/B, deviation %A,different B-A and peak luminance measurements. User calibration factor and color-correction functions. Accumulation luminance measurement. Max/Min/AVG function. Backlit function. Comparator function. Auto power off function. Data Hold function. Data memory and read function. Data logger function. USB Interface.
- According to JISC1609 : 1993 and CNS 5119 general A class specifications. - Spectral response close to CIE luminous spectral efficiency. - Measuring the intensities of illumination displays in unit of Lux or Foot-candle. - Silicon photo diode and filter. - Measuring light source include all visible light source. - Cosine angular corrected. - Auto power off and disable function. - Data hold, Max/Min/AVG hold. - Real Zero function. - Auto ranging.
Precision instrument for light luminance and color coordinate Meet CIE (International Commission on Illumination) photopic spectral response Color temperature or Correlated color temperature Custom reference value of color difference mode Lux or foot-candle unit selection Magnetic mount Tripod socket
Storage Temperature:Dimension / Weight:Accessories:169(L)×63(W)×37(H)mm (6.7”×2.5”×1.5”)Battery, instruction manual, carrying case.-10 to 50°C (14 to 122°F)Accuracy: ±3% (Calibrated to standard incandescentlamp 2856°K)Temperature characteristics:Response time: 0.5 secLight detector: SI PhotodiodeOperation temperature: 0°C ~ 40°C(32°F ~ 104°F)Operation humidity: 0~80% RHStorage Humidity: 0 to 70% RHSpecificationsMeasuring level range: 0.0 to 199.9/1999/19990/199900 lx0.0 to 19.9/199.9/1999/19990 fcAutomatic or manual selection of rangeResolution: 0.1 ~ 100 lx, 0.1 ~ 10 fc±0.1% / °C(25°C)Over range: “-OL-” displayPower supply: 1.5V type AA battery x2Power life: Approx. 80 hoursWeight: Approx. 185g[Note] 1fc =10.76lxAngle deviation from cosinecharacteristics10° ± 1% 30° ± 2%60° ± 5% 80° ± 20%