Lux Meter PCE-CRM 40

Order no.: PCE-CRM 40

Description / Highlights 


Lux Meter
Measurement range up to 150,000 lx / Measures correlated color temperature (CCT) / Standard chromaticity diagrams according to CIE 1931 and CIE 1976 / Indicates wavelength / Presents tristimulus and RGB values / Includes USB interface, cable and PC software

With the LED lux meter, important photometric factors in the field of light measurement can be determined. These include the tristimulus values of XYZ, the u´ and v´ color location coordinates according to CIE 1976, and the xy color location coordinates according to CIE 1931. Moreover, further color statistics are measured as absolute values and differences. The user can determine the dominant wavelength within the sensitivity range of the LED spectrophotometer, which is 360 … 780 nm, as well as the color density (Pe) and the correlated color temperature (CCT) in Kelvin.

Also, the lux meter can measure the illuminance in lux (lx) or foot-candle (fcd) as well as the light flux in lumens (lm) and show the color location in the RGB color space. Due to the ergonomic single-handed operation, the large display, memory, data interface and software, measurements with the lux meter can be carried out quickly and the results are reproducible. The test results can be recorded by means of the software. Its specifications make the lux meter perfectly suitable to classify and optimize lighting installations and conditions in various fields of application.

– Measurement of colour temperature
– Lux measurement up to 150 kLux
– Representation of Tristimulus and RGB
– Ideal for LEDs
– SD memory
– Colour LCD

Description / Highlights


Standardize Daily, Monthly, Annual QA
Ensure standardization among clinics and machines with shared tolerances. Apply ready-to-use, yet customizable, templates for efficient QA. No more spreadsheets!

Streamline Machine QA with Device Connectivity and Control
Automate data collection with direct device integration to Daily QA™ 3IC PROFILER™ and IC PROFILER™-MR — no need for additional software and transfer of data. Complete your entire TG-142 and DIN QA easily within SunCHECK.

Browser-Based Access
Access Machine QA and results from any networked computer. One point of access drives efficiency and critical consistency across locations, machines and staff.

Automate Imaging, MLC and VMAT QA
Deliver QA beams and SunCHECK Machine automatically captures, processes and analyzes the images or log files. Results are stored and, if necessary, notifications are sent, based on pass/fail status.


Measurement functions

Tristimulus values: XYZ

Chromaticity: Ev xy, Ev u’v’

Correlated colour temperature: Tc

Colour difference: Δ (XYZ), Δ (Evxy ), Δ (Evuv ), ΔE v ΔTc Δuv

Chromaticity coordinates: ICE1931 (x, y), ICE1976 (u, v)

Dominant wavelength: λd

Colour fastness: Pe

Luminous flux: Φ, RGB parameter, colour chart, maximum recording and indicator

Measuring range

0.1 … 150,000 lx

0.01 … 15000 fcd

Ev: 5 lx / 0.5 fcd or above in four automatically selected ranges (lx or fcd is switchable)

Spectral range

360 … 780 nm

Relative spectral sensitivity

Based on CIE standard X (λ), y (λ), and Z (λ), deviation within 6% (f1 ‘) of CIE spectral luminous efficiency V (λ)

Cosine correction

Ev: < 3% (f2)


Ev : ± 5 % ± 1 digit of displayed value

Xy: ± 0.003 lx (at 500 lx, standard A)


Ev : ± 0.5% + 1 digit (2σ)

xy: ± 0.0005 (measured at 500 lx, standard A)

Temperature drift

Ev : ± 3% ± 1 digit of the indicated value

xy: + -0.003

Response time

0.5 second (for continuous measurement)

Sensor type

Silicon photocell



Slot for SD card


3.2″ color LCD

Operating conditions

-10 … 40°C / 14 … 10°F <85% RH

Storage conditions

-20 … 40°C / -4 … 104°F <85% RH

Power supply

2200-mAh rechargeable lithium-ion battery

Battery life

Min. 12 hours


210 x 80 x 35 mm / 8.2 x 3.1 x 1.37 in


300 g / < 1 lb including battery



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