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
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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