LS332 Luminance Meter

1 million cd/m² ultra-wide range, multi-parameter measurement

Simultaneously measures luminance, flicker frequency, CCT, CRI
Replaceable 10mm/20mm dual light tube
Displays spectral curve
High accuracy, authoritative certification

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The instrument is a multifunctional luminance meter equipped with a spectral sensor. It is designed to measure luminance, flicker frequency, color rendering index (CRI), and correlated color temperature (CCT) of display screens, backlight panels, lighting fixtures, and similar applications. Additionally, the instrument can display the spectral distribution curve, which helps in identifying the type of backlight source.

Product application

Parameters

Parameter Name Parameter Value
Luminance Wavelength Range 400nm ~ 700nm
Luminance Wavelength Interval 10nm
Luminance Measurement Distance ≤1m
Luminance Measurement Range 1 ~1,000,000cd/m2
Luminance Resolution 0.01cd/m2
Luminance Measurement Accuracy ≤±(5%H+2cd/m2)
(H is the standard value, calibrated with the CIE standard illuminant A )
Luminance Unit Options cd/m2 (default), fL
CCT Measurement Range 1,000 ~ 100,000K
CCT Measurement Accuracy ±5% (Calibrated with the CIE standard illuminant A)
CRI Measurement Range 0 ~ 100
CRI Measurement Accuracy ±2 (Calibrated with the CIE standard illuminant A)
Flicker Frequency Measurement Range 10 ~ 500 Hz
Flicker Frequency Measurement Distance ≤0.1m
Flicker Frequency Measurement Accuracy ±5%
Test Aperture Diameter Φ10mm/20mm
Host Size 147.2mm * 72mm * 28mm
Probe Size Diameter 40mm*Thickness 76mm
Weight About 370g (including batteries)
Display 240*160 Dot Matrix LCD
Power Supply 2 AA Alkaline Batteries
Operating Environment Temperature 0 ~ 40℃, Humidity <85%RH
Supply Voltage DC3V

Features

Ultra-Wide Luminance Range — Up to 1,000,000 cd/m²

Easily measure ultra-high luminance levels with a maximum luminance range of up to 1,000,000 cd/m². Ideal for testing HDR displays, high-intensity lamps, projectors, and other high-brightness applications.

Dual Measurement Apertures for Greater Flexibility

Features two interchangeable light tube (10mm and 20mm) to ensure accurate luminance measurements on both small and large screens. One device, multiple applications—adaptable to a wide range of testing needs.

Instant Measurement with Fast Response

Delivers immediate results the moment the device is powered on—no warm-up time required. Enjoy rapid, real-time measurements that boost productivity and streamline your workflow.

High-Precision Measurements — Certified Accuracy

Delivers highly accurate and reliable results that comply with authoritative metrology standards, meets the requirements for professional certification.

Spectral Sensor Design for True-to-Eye Accuracy

Utilizes a spectral sensor with a response curve precisely matched to the V(λ) function, ensuring accurate luminance measurements across screens with varying color temperatures.

Flicker Frequency Measurement for Eye Comfort Evaluation

Equipped with flicker frequency detection capabilities to identify screen or lighting flicker issues. Supports the assessment of eye-friendly displays and helps ensure visual comfort in various lighting environments.

Real-Time Spectral Curve Measurement for Display Analysis

Through spectral curve analysis, the light source type of the display can be identified.

Color Rendering Index (CRI) Measurement

Accurately measures the color rendering index to evaluate the color reproduction quality of lamps and display devices, ensuring true-to-life color performance.

Correlated Color Temperature (CCT) Measurement

Precisely measures the color temperature of screens and light sources to verify compliance with industry standards, ensuring accurate color consistency and quality control.

Advanced Digital Probe with Strong Anti-Interference

Utilizes cutting-edge digital probe technology with on-probe digital signal processing, ensuring robust resistance to interference and delivering highly accurate measurements.

Comprehensive Statistical Function

Simultaneously displays real-time, maximum, minimum, and average luminance values for a thorough and convenient analysis of light source variations.

Data Storage Function

Built-in memory stores up to 9 sets of measurement data, allowing convenient access and comparison of results anytime.

Low power consumption

cd/m2 and fL units can be switched

High-definition LCD display

Packing List

No. Description Quantity Unit
1 Luminance Meter Host 1 pcs
2 Luminance Meter Probe(Standard φ20mm light tube) 1 pcs
3 φ10mm light tube 1 pcs
4 User Manual 1 pcs
5 Calibration Report 1 pcs

Qualifications and Standards

Standards for the product:

  • GB 50034-2013 Standard for lighting design of buildings

  • GB 40070-2021 Hygienic requirements of study products for myopia prevention and control in children and adolescents

  • GB/T 9473-2017 Performance requirements for table lamps for paper task

  • GB/T 39388-2020   Characterization of the performance of illuminance meters and luminance meters

  • JJG 211-2021 Verification Regulation of Luminance Meters

  • T_ZZB 2793-2022 Spectral radiance meter

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