HABOTEST HT620L Handheld Digital Illuminometer Handheld LCD Backlight Lux Light Illuminance Meter Battery-powered Photometer Luxmeter for Plants with 180° Rotatable Probe Measuring Range Up to 100,000 Lux/FC Self-defined Light Source Coefficient and Stora

Features:
[Various LED Light Source Mode] 8 Modes for more targeted and precise measuring - standard light source, white/red/yellow/green/blue/purple LED, and self-defined light source coefficient.
[Professional LUX Meter]Visible light emitted by fluorescent lamp, metal halide lamp, high voltage sodium lamp or incandescent lamp can be measured.
[Wide-rangeHigh-precision Meter]Measures luminosity from 1 to 100,000 Lux/FC with high resolution of 1 Lux/FC.
[Accurate Measurement]High accuracy of (3%+5Lux) (at 2854K incandescent lamps); (6%+5Lux) others; and auto/manual range for accurate measurement.
[Practical Function]Press the Data Hold button to freeze the displayed reading; unit conversion between Lux and FC(foot-candle); and zero calibration.
[User Friendly]Measures 7.28*2.36*1.18in and weighs 4.97oz, featuring compact and lightweight; photosensitive probe can be rotated clockwise in 180; and LCD HD color screen ensures clear visibility even in low-light area.
Note:
*Batteries are not included.
*The function of selecting light source and self-defined light source coefficient only for HT620L.
*The 180 rotatable sensor is only turning toward the right.
*One Lux is the light received on the surface of a candle with a vertical intensity of 1 meters and an area of 1 square meters.
*One FC is the light received on the surface of a 1 inch square foot at a distance of 1 feet from a candle with a light intensity.
*The white plastic sensor dome should be cleaned with a damp cloth when necessary.
Parameters:
LUX/FC Range: 1 ~ 1000 / 10,000 / 100,000
Accuracy: (3%+5Lux)(at 2854K incandescent lamps); (6%+5Lux) others;
Cosine angle deviation characteristics: 30 2%；60 6%；80 25%
Calibration: calibrated to a standard incandescent lamp at color temperature 2854K
Zero Calibration: Yes
Resolution: 1LUX / 1FC
Sensor: Silicon photo-diode and spectal response filter
Operating Temperature/Humidity/Altitude: 0-40℃, ＜80%RH, ＜2000m
Sampling Rate: Approx. 2 times per second
Spectral Range: 320-730nm
Auto Power Off: 10 minutes
Power Supply: 3 * 1.5V AAA(LR03)batteries(Batteries not included)