The Testo 545 Lux meter - Quick & easy determination of Illuminance for productivity, well-being and health in working environmentsWith the 545 Light meter, the measurement of illuminance of several light sources has never been more convenient or precise. Measuring different light sources can help increase productivity, well-being and health in a working environment and is useful for preventing concentration problems and headaches. Thanks to the app compatibility, the light meter for LED is set up and configured in minutes and ready to go. In addition, the App not only supports you in configuring the measuring instrument and takes over display, storage and documentation of the measured values - it also turns your smartphone into a second display.Time and point average values are automatically calculated allowing for a fast determination of all relevant information at a glance. The digital light meter is also compatible with almost all commercially available LEDs, ensuring a wide range of applications.Technical Data:Light Measuring range: 0 to 100000 LuxAccuracy: Class C ¹⁾F1 = 6% = V(Lambda) adjustmentF2 = 5% = cos-true evaluationTotal ≤ 15%±3% of mv±1DigitResolution: 0.1 Lux (<10000 Lux) / 1 Lux (≥ 10000 Lux)Velocity - Thermal anemometer Measuring range: 0.01 to 5906 fpm / 0.01 to 30 m/sWeight: 10 oz. / 288 gDimensions6 x 2 x 1 in. / 149 x 60 x 28 mm/ Probe: 5 x 2 x 1 in. / Probe: 134 x 54 x 23 mmOperating temperature: -4 to +122 °F / -20 to +50 °CProbe: -4 to +158 °F / Probe: -20 to +70 °CHousing: ABS + PC / TPECable length: 4.593 ft. / 1.4 mProtection class: IP40, IP20Battery type: 3x AABattery life: 70 hStorage temperature: -4 to +122 °F / -20 to +50 °CScope of delivery:testo 545, Transport bag, Calibration protocol, 3 x AA batteries