Ultraviolet Meter (UV Meter) Model ST-513 Description: These instruments are designed to measure ultraviolet light in the range from 220 to 275 nanometers (UVC), 380 to 320 nanometers (UVA) and 280 to 400 nanometers (UVAB). The good illumination range of each kind of meter allow users to conduct the most precise quantitative measurements of ultraviolet radiation. Features: Backlit LCD and 4 Digits dual display High and Low measurements Range in a unit mW/cm2 or uW/cm2 Socket of tripod mounting Automatic measuring Low battery indicator Magnetic mount 20 points memory Specification: Specifications UVC (ST512) UVA (ST510) UVAB (ST513) Spectrum Range 220~275 320~380 280~400 Calibration Point 254 nm 365 nm 365 nm Illumination Range 1 uW/cm2 ~ 9999 uW/cm2 / 0.01 mW/cm2 ~ 40.00 mW/cm2 Accuracy 23 ±5oC(73.5 ±9oF) ±4% ±1 digit Over Range Indication "-HI-" Zero Adjust YES Auto Record YES Sample Time Approx. 0.3 sec. Display Backlit LCD and Dual Display Memory 20 points and 1 for interval time Operation Temperature 0~50oC(32~122oF); 10~90% RH Battery Type 9V (006P, IEC6F22, NEDA1604) Weight Approx. 90g Dimension 140 x 49 x 29 cm (5.51 x 1.93 x 1.14 inch) Accessory 9V Battery, UV sensor probe, Instruction Manual SENTRY ST-513 Ultraviolet Meter UV Meter à¤Ã×èͧÇÑ´áʧÂÙÇÕ à¤Ã×èͧÇÑ´áʧÍØŵÃéÒäÇâÍàÅçµ