Light Meters

Light meters, sometimes referred to as lux meters, are instruments that measure light levels or light pollution.

How is light measured?

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

  • Photometer – measures visible light or light intensity. Light intensity can also be measured in two different ways; one way is by using a luminance meter which measures the visible energy output of a light source, or another method is by using an illuminance meter that measures the visible energy falling on an object's surface
  • Integrating sphere - collects electromagnetic radiation from a source completely external to the optical device
  • Spectrometer – uses the light, breaks it into its spectral components and creates a digital signal in wavelength form
  • Light Meter – measures light levels and is the most commonly used piece of equipment
  • Light meters usually return measurements in Lux (in Europe), foot-candles (in the US), or both. Typical models are handheld and feature an integrated light sensor or a sensor connected by a lead.

    What are light meters used for?

    Light meters are frequently used in workplaces, schools, hospitals and public places to test if there is an appropriate amount of light within the environment. This is particularly pertinent in the workplace, as there is a responsibility that employees work in an environment with suitable lighting.

    They are also a key piece of light measurement equipment when it comes to working in photography, especially when using a camera in a studio, or in ambient light. A handheld light meter is often used to determine the proper exposure for a photograph.

    Budget light meters can help to perform quick checks on light intensity where more advanced models have monitoring functionality as well as the ability to record, store and transfer data.

    Key Benefits of a Light Meter:

  • Portable and sometimes pocket-sized, they are a useful piece of equipment to have for any light measuring applications
  • A meter that offers accuracy in measurement
  • Easy to read displays with real-time results

  • ...
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    Description Price Calibrated Maximum Light Level Minimum Light Level Best Accuracy Resolution Sensor Type Battery Life Battery Type Power Source Weight Features Height Length Maximum Operating Temperature
    RS Stock No. 106-5311
    BrandRS PRO
    £53.50
    Each
    Units
    - 400000lx 400lx ±3 % 3 lx Photodiode - AAA Battery 80g - 23mm 133mm -
    RS Stock No. 123-2272
    BrandRS PRO
    £146.00
    Each
    Units
    RSCAL - 0.01lx ±3 % ± 5 Digit - Photodiode 100 h AAA Battery 320g Accurate, Auto Power Off Function, Data Hold, Instant Response, Point Average Function 150mm 72mm +50°C
    RS Stock No. 123-2223
    BrandRS PRO
    £63.00
    Each
    Units
    - - 0.01lx ±3 % ± 5 Digit - Photodiode 100 h AAA Battery 320g Accurate, Auto Power Off Function, Data Hold, Instant Response, Point Average Function 150mm 72mm +50°C
    RS Stock No. 123-2220
    BrandRS PRO
    £52.97
    Each
    Units
    - 200000lx 0.01lx ±3 % 0.1 lx Photodiode 200 h 9V Battery 250g Accurate, Data Hold, Instant Response 135mm 72mm +40°C
    RS Stock No. 123-2360
    BrandRS PRO
    £135.97
    Each
    Units
    RSCAL 200000lx 0.01lx ±3 % 0.1 lx Photodiode 200 h 9V Battery 250g Accurate, Data Hold, Instant Response 135mm 72mm +40°C
    RS Stock No. 123-2375
    BrandRS PRO
    £191.00
    Each
    Units
    RSCAL - 0lx ±3 % ± 0.5 Digit % 0.01 lx Photodiode 400 h AAA Battery 320g Accurate, Auto Power Off Function, Data Hold, Instant Response, Peak Hold Function, Relative Function 150mm 72mm +40°C
    RS Stock No. 123-2221
    BrandRS PRO
    £108.00
    Each
    Units
    - - 0lx ±3 % ± 0.5 Digit % 0.01 lx Photodiode 400 h AAA Battery 320g Accurate, Auto Power Off Function, Data Hold, Instant Response, Peak Hold Function, Relative Function 150mm 72mm +40°C
    RS Stock No. 123-2222
    BrandRS PRO
    £58.85
    Each
    Units
    - - - ±3 % ±5 Digits 0.01 lx - 400 h AAA Battery 320g Accurate, Data Hold, Instant Response 35mm 72mm +50°C
    RS Stock No. 123-2258
    BrandRS PRO
    £141.85
    Each
    Units
    RSCAL - - ±3 % ±5 Digits 0.01 lx - 400 h AAA Battery 320g Accurate, Data Hold, Instant Response 35mm 72mm +50°C
    RS Stock No. 123-8792
    BrandRS PRO
    £208.00
    Each
    Units
    RSCAL - - - - - - - - - Memory Recall Button, Push Button 4 Light Type Select 180mm 72mm -
    RS Stock No. 123-8776
    BrandRS PRO
    £125.00
    Each
    Units
    - - - - - - - - - - Memory Recall Button, Push Button 4 Light Type Select 180mm 72mm -
    RS Stock No. 124-0938
    BrandRS PRO
    £83.46
    Each
    Units
    - - - ±3 (Incandescent) % - Photodiode - - Battery 250g Manual Ranging, Manual Zero Adjustment, Max Hold 130mm 55mm -
    RS Stock No. 106-5312
    BrandRS PRO
    £214.00
    Each
    Units
    - 200000lx 20lx ±3 % - Photodiode - - Battery 250g Data Logging, USB Interface 38mm 172mm -
    RS Stock No. 146-4652
    BrandRS PRO
    £341.33
    Each
    Units
    - 99990lx 0.01 fc, 0.1 lx ±0.02 (XY/800 lx % @ Standard Illuminant A Measured), ±3 (EV Linerarity) % - - 50 h AAA Battery 345g - 35mm 150mm +50°C
    RS Stock No. 146-4653
    BrandRS PRO
    £219.35
    Each
    Units
    - 199999lx 9.999 fL, 9.999 cd/m² ±3 (Calibrated to Standard Incandescent Lamp (2856 K % @ +25°C or +77°F)), ±5 (Calibrated to Standard Incandescent Lamp (2856 K % @ +25°C or+77°F)) 0.01 lx - 50 h AAA Battery 345g - 35mm 150mm +50°C
    RS Stock No. 146-9083
    BrandRS PRO
    £71.58
    Each
    Units
    - 400000lx 40lx ±3 % - Silicon Photo Diode - 9V Battery 250g - 28mm 162mm -
    New
    RS Stock No. 200-3701
    BrandRS PRO
    £96.90
    Each
    Units
    - - - 4 % 0.1 lx Photodiode - 9V Battery 390g Accurate, Data Hold, Instant Response 20mm 170mm +40°C
    RS Stock No. 155-8901
    BrandRS PRO
    £44.40
    Each
    Units
    - 40000lx 0lx ±5 % 0.1 lx Silicon Photo Diode - 9V Battery 175g Easy Transfer of Measuring Data to User Smart Phone 35.6mm 206mm +40°C
    RS Stock No. 292-363
    Mfr. Part No.0560 0540
    BrandTesto
    £103.24
    Each
    Units
    - 99999lx 0lx ±3 % 1 lx, 10 lx - 200 h AAA Battery - - 5in 43mm +122°F
    RS Stock No. 788-8923
    Mfr. Part No.SO 200K
    BrandSauter
    £171.12
    Each
    Units
    RSCAL 200000lx 200lx - 0.1 lx Photodiode - - Battery 250g Data Hold 28mm 100mm -