Check the listing for details. SENTRY ST520 Chroma Light Meter Light Luminance Meter for Color LED Lighting. Condition: New – Open box. Listed at 119.00 USD. SENTRY ST520 Chroma Light Meter Light Luminance Meter for Color LED Lighting(PLEASE NOTE THAT SHIPPING IS DELAYED UNTIL MAY 15, 2023 AS WE ARE OUT OF THE COUNTRY) ST520 is a chroma meter with precision measurement of light luminance and color coordinate. It meets CIE photopic spectral response and the color temperature is given to verify the light source. Correlated color temperature and custom reference value of color difference mode are useful for users to measure and identify the differences between light sources. Features:1.Precision instrument for light luminance and color coordinate2.Meet CIE (International Commission on Illumination) photopic spectral response3.Color temperature or Correlated color temperature4.Custom reference value of color difference mode5.Lux or foot-candle unit selection6.Magnetic mount7.Tripod socket Specification:ReceptorSilicon photocellMeasuring FunctionIlluminance: Ev (lx or fcd)Color Coordinate: (x,y), (u\\\',v\\\') (CIE 1960)Correlated Color Temperature: CT, uvColor Difference:(Ev,x,y), (Ev,u\\\',v\\\'), (Ev,u\\\'v\\\'), (One set of reference color)Measuring RangeEv=0~80,000 lx (0~7,432 fcd); CT 99,990K Max.Accuracy(at 25C/77F, 60%RH)Ev: (3%+2 digital) (3,000 lx, standard illuminant A measured)x, y: 0.02 (100 lx, RGB LED light)ResolutionEv: 0~9999 lx: 1 lx, Over 10000 lx: 10 lx;0.0~999.9 fcd: 0.1 fcd, Over 1000 fcd: 1 fcd;CT: 0~9999 K: 1 K, Over 10000 K: 10 K;x, y: 0.001; u\\\'v\\\': 0.001Response TimeApprox. 1 sec.Temperature DriftEv: (5%+2 digital) (3,000 lx, standard illuminant A measured)x, y: 0.008 (100 lx, RGB LED light)Humidity DriftEv: (3%+2 digital) (3,000 lx, standard illuminant A measured)x, y: 0.005 (100 lx, RGB LED light)Operation Temperature0~50C (32~122F,