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Lux measuring instruments, also known as illuminance meters, are available in a large number of versions and with various measuring functions.
The palette ranges from pure lux meters to true al-rounders.
But what does a lux meter do?
This device is used to measure illuminance. This physical unit indicates how bright it is at the measuring point, i. e. how much luminous flux of a light source falls on a surface. The further away the defined area is from the light source, the weaker the illuminance becomes.
Illuminance is the incedent luminous flux per illuminated surface and is expressed in lux (lat. light) or footcandles. Footcandle is the Anglo-Saxin measure of illuminance, abbreviated fc. One footcandle corresponds to 10,76 lux, one lux corresponds to 0,0929fc.
A silicon photodiode is often used as a measuring cell in the classic luxmeter. In some devices, the measuring cell also serves as a power supply, so that these devices function without an additional energy source.
The use of the lux measuring device is increasing in all areas of daily life. The measurement of light intensity is of great importance in commercial and industrial areas (topic: lighting at the workplace). Products in stores must be illuminated with the required lux number in order to create the best visual impression for the customer. The lux measuring instrument/lux meter is also used for this purpose.
5 in 1 environmental measuring device PCE-EM 883 5 in 1 lux meter for measuring sound, light intensity, wind speed, temperature and humidity HOLD function MIN-MAX memory illuminated LCD
delivery time 3-5 Working days*
Light measurement - Luxmeter
To evaluation light: flicker and flicker frequency, as well as measure lux up to class A.
Perfect for lighting experts.
delivery time 5-10 Working days*
The MAVOMASTER is a universal basic device that can be combined with various measuring probes. With the four classified MAVOPROBES LUX 5032 B, LUX 5032 C, MONITOR and LUX / UVA, illuminance, luminance as well as illuminance and irradiance UV-A 365nm can be measured.
delivery time 3-5 Working days*
How many Lux are appropriate?
For the lighting of indoor and outdoor workplaces there are guideline values derived from European standards.
"Illumination of indoor workplaces", EN 12464-1 (June 2011)
"Illumination of outdoor worklplaces", EN 12464-2 (October 2007)
Examples of indoor guidelines:
- Break rooms: 100 Lux
- Bakeries: 300-500 Lux
- Study (office): 500 Lux, at least at the desk
- Sales areas: 300 Lux
- Classrooms, seminar rooms: 300 Lux
- Lecture halls: 500 Lux
- Corridors: 100 Lux
- Examination rooms (general lighting): 500 Lux
Examples for outdoor guidelines:
- Walkways, exclusively for pedestrians: 5 Lux
- Parking spaces (low, medium, high traffic): 5, 20, 20 Lux
- Covered platforms, long-distance traffic: 100 Lux
- Construction sites (construction areas): 50 Lux
Luxmeter - more than just an illuminance meter
There are lux meters that are designed solely for measuring luminous intensity. However, there are also devices that are true all-round talents and equipped with extensive measurement parameters.
These include temperature, air pressure, sound, and humidity.
To make your decision a little easier, there is an overview of the respective functions of the all-round lux meter or the pure lux meter.
Overview Luxmeter Allrounder:
| PCE-EM 882 | |||
Temperature | yes | yes | yes | yes |
Temperature with K-Type |
|
| yes | yes |
Air pressure | yes |
|
| yes |
Lux measurements | yes | yes | yes | yes |
Wind speed |
|
|
| yes |
Volume flow |
|
|
| yes |
Humidity | yes | yes | yes | yes |
Sound level |
| yes | yes |
|
Data logger | yes |
|
|
|
3-axis accelerator | yes |
|
|
|
Accessories |
| Puncture sensor | Infrared temperature adapter |
|
Multimeter |
|
| yes |
|
Measuring range |
|
| DC voltage AC voltage DC current AC current Resistor Capacity Frequency |
Overvie of pure lux meters:
| ||||
Calibration certificate | ICA |
| ICA | ICA |
Measuring ranges | 0,00-40.000 lux | 40 / 400 / 4000 / 40.000 / 400.000 lux | 40 / 400 / 4000 / 40.000 / 400.000 lux | 400 / 4000 / 40.000 / 400.000 lux |
Resolution | 0,01 lux |
| 0,01 / 0,1 / 1 / 10 / 100 lux | 0,1 / 1 / 10 / 100 lux |
Display | 5-digit LCD-Display | max. display 3999 Display of 40,000 / 400,000 lux | 3 3/4-digit LCD-Display | 3 3/4-digit LCD-Display |
Accuracy | ±10 % vom Messwert +5 Digits (Entspricht Klasse B / DIN 5032 Teil 7) | ± 3% (with a standard incandescent bulb | ± 5% of reading ± 10 digits (<10,000 lux) ± 10% of reading ± 10 digits (> 10,000 lux) | ±5 % of reading ±10 digits (<10.000 Lux) ±10 % of reading ±10 digits (>10.000 Lux) |
Measuring rate | 2 per second | 2,5 per second | 1,5 per second | 1,5 per second |
Operating condidtions | 0...40 °C | +5 ... +40 °C/ 0...70 % rF | 0...40 °C / 80 % r.F. | 0...40 °C / 80 % r.F. |
Memory |
| 99 readings |
| 16.000 readings |
Overload display | OL= Overload | OL= Overload | OL= Overload | OL= Overload |
Reproducibility |
| ± 3 % | ± 3 % | ± 3 % |
