TopOne Light Meter Tester Measuring Luxmeter with Digital LCD Display for Study Plants Living Room (Range: 0.1~200,000Lux, 0.01~20,000Fc)
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Digital Lux Meter has wide application, school, office, family, industry, warehouse, laboratory etc. Used to measure the lighting degree of given surface, ie the ratio of surface luminous flux to lighting area.
Display:Large LCD characters display
Range:0.1 to 200000Lux or 0.01 to 20000Fc
Accuracy:+4% to -4%
Measurement speed:2 times/second
Units:Lux or Fc
Auto power off time:After approxi.15 minutes
Power supply:One 9V battery (Included)
Operating environment:14 to 122 Fahrenheit or (-10 to 50 Centigrade), 10% to 90%RH
1 x Digital Lux Meter
1 x 9V battery
Do not place the unit in high temperature or humidity environment. Keep the surface of optical detector clean when in use, make sure the reference level is vertically facing the light source.
When the low battery icon appears on the display, replace the battery as soon as practical.
Please cover the protective cap and store the instrument in a stable, dust-free environment out of direct sunlight when not in use for the life of meter.
Most helpful customer reviews
0 of 0 people found the following review helpful.
Great bargain, good accuracy
By John K.
I use light meters in a professional setting on a regular basis, and also model the performance of lighting systems; so my livelihood depends in part on knowing how to measure light levels. In the work setting, I use a professional grade device, the Extech Model 407026 (link: Extech 407026 Light Meter which costs more than five times as much as this unit. For basic light measurements, this unit (the TopOne luxmeter) delivers identical results (rated to plus or minus four percent). You will also get the ability to hold readings (e.g. to measure light levels in out-of-view locations), min/max measurements, and use either lux or footcandle units. The units have almost identical sampling rates (0.5 seconds per sample for the TopOne, 0.4 seconds per sample for the Extech). The TopOne is also much smaller, small enough to fit in a pocket.
Features the Extech gives you that the TopOne (this product) doesn't have include: Ability to connect to a computer to log measurements, separate sensor for easier positioning, larger sensor area, rugged rubber case, ability to modify the results to account for different light source spectographic emissions, perform relative measurements (by using the zero adjust), average a series of readings, calibrated to a published standard (CIE). You also get a carrying case when you buy the Extech, but would need to supply your own for the TopOne.
The TopOne is rated for a wider range of temperatures than the Extech (both are rated up to 50 Celsius which is good, but the TopOne is rated to -10 C versus 0 C for the Extech).
The TopOne is an impressive bargain for its good accuracy and basic functions. If you don't need the extra functionality of a professional model, you will likely be happy with this unit.