Light Meters

Light meters, sometimes referred to as lux meters, are instruments that measure light levels or light pollution. You can find out more in our guide to light meters.

How is light measured?

Light can be measured in different ways with different light measurement instruments:

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Testo 540 Light Meter, 0lx to 99999lx, ±3 %
Testo 540 Light Meter, 0lx to 99999lx, ±3 %
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RS Stock No.: 292-363Brand: TestoManufacturers Part No.: 0560 0540

P.O.A.

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Testo
99999lx
0lx
±3 %
1 lx, 10 lx
-
200 h
AAA
95g
-
5in
43mm
+122°F
540
25mm
+32°F
Testo 440 Lux Kit (air velocity and IAQ measuring instrument) Light Meter
Testo 440 Lux Kit (air velocity and IAQ measuring instrument) Light Meter
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RS Stock No.: 176-5572Brand: TestoManufacturers Part No.: 0563 4402

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Testo
-
-
-
-
-
12 h
AA
1.3kg
-
154mm
32mm
+50°C
440 Lux Kit (air velocity and IAQ measuring instrument)
65mm
-20°C
Testo 545 Luminance Meters, 0lx to 100000lx, ±3 %
Testo 545 Luminance Meters, 0lx to 100000lx, ±3 %
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RS Stock No.: 255-9519Brand: TestoManufacturers Part No.: 0563 1545

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Testo
100000lx
0lx
±3 %
0.1 lux
Photodiode
-
-
-
-
-
-
-
545
-
-