Ai101 Luxmeter portable illuminance meter
- Technology
- Spectrometers
- Partner
- Apacer Technology
The Ai101 luxmeter portable illuminance meter is a handheld instrument for professionals who need accurate measurements in intense lighting conditions. It captures the light spectrum from 330–850 nm, enabling analysis from ultraviolet through near-infrared. Its 5.5 nm spectral resolution helps resolve narrow-band LED peaks with high precision. With a measurement range up to 600,000 lux, it is suitable for extremely bright sources such as stage lighting, studio lamps, and outdoor floodlights. The device calculates professional lighting quality metrics including TLCI, SDCM, CQS, TM-30, CRI, and CCT directly on the instrument. A built-in 4.3-inch touchscreen supports stand-alone operation and instant on-site review of results. Measurement data can be saved to an SD card and transferred to PC software for deeper analysis and PDF report generation. Its cosine-corrected sensor head, compact form factor, and tripod mounting options make it well suited for field use in cinematography, stage engineering, architecture, and horticultural lighting.
The Ai101 is a portable illuminance spectrometer built for professionals who need more than a basic handheld lux meter. In addition to illuminance, it measures spectral distribution, irradiance, chromaticity, colour rendering metrics, and other advanced lighting parameters in one compact device.
Its combination of 330–850 nm spectral coverage, 5.5 nm optical resolution, and up to 600,000 lux measurement capability makes it especially suitable for LED evaluation, stage and studio lighting, architectural projects, horticultural applications, and other high-intensity measurement tasks.
Range features
A high level overview of what this range offers
- Broad UV–NIR spectral range (330–850 nm): Measures ultraviolet, visible, and near-infrared output for full-spectrum light analysis in one handheld instrument
- High 5.5 nm spectral resolution: Resolves narrow LED peaks and other fine spectral details for more accurate colour and spectrum evaluation
- Up to 600,000 lux measurement range: Handles extremely bright light sources such as stage spotlights, studio fixtures, and outdoor floodlights without easily saturating
- Professional lighting quality metrics built in: Calculates TLCI, SDCM, CQS, TM-30, CRI, CCT, and related values directly on the device
- Stand-alone touchscreen operation: The 4.3-inch colour resistive touchscreen allows immediate measurement, review, and navigation without requiring a PC
- On-device storage and PC reporting: Save measurements to SD card and use ASI software via USB for deeper analysis and PDF report generation
- Cosine-corrected sensor head: Improves illuminance accuracy for light arriving at different angles, supporting more reliable field measurements
- Over-exposure warning indicator: Highlights excessive light input in red so users can quickly adjust setup for valid readings
- Portable and tripod-mountable design: Lightweight 350 g construction with M6 and 1/4"-20 UNC mounting interfaces for field work and stable fixed-position measurements
What’s in this range?
All the variants in the range and a comparison of what they offer
Specification | Ai101 |
Model | Ai101 |
Display | 4.3″ colour resistive touchscreen |
Measured parameters (stand-alone) | Spectrum (330–850 nm); illuminance (lx); irradiance (W/m²); colour fidelity index (Rf); colour saturation (Rg); correlated colour temperature (CCT) & D_uv; XYZ tristimulus values; dominant wavelength (λ_D); peak wavelength (λ_P); peak value (λ_PV); colour purity; colour quality scale (CQS); colour rendering index (CRI R1–R15, Ra); chromaticity coordinates (CIE 1931 x,y & CIE 1976 u′,v′); TLCI |
Standards compliance | TM 30-15, ANSI C78.377 |
Sensor head | Cosine correction diffuser (8 mm aperture) |
Illuminance range | 1 lx – 600,000 lx |
Reproducibility (Illuminance) | 99% (10 – 600,000 lx) (2σ, standard A light source) |
Reproducibility (Chromaticity) | x: 0.0015; y: 0.0015 (2σ, standard A light source) |
Accuracy (Illuminance) | 97% (10 – 600,000 lx) (with standard A light source) |
Accuracy (Chromaticity) | ±0.002 (CIE x or y, for source ≥ 10 lx, standard A) |
Wavelength data interval | 1 nm |
Spectral resolution (FWHM) | 5.5 nm |
Integration time (auto/manual) | 1 ms – 60 s (auto-integrating exposure) |
Dimensions (L×W×H) | 150 × 97 × 32 mm (including sensor head) |
Mounting interfaces | M6 and 1/4″-20 UNC threaded sockets |
Weight | 350 g |
Battery capacity | 3350 mAh (rechargeable Li-ion) |
Operating environment | 0 °C to 40 °C (≤ 80% RH, non-condensing) |
Storage environment | –10 °C to 60 °C (≤ 70% RH) |
FAQs
for Ai101 Luxmeter portable illuminance meter
The A-100 Mini Spectroradiometer is a compact, portable device designed for measuring spectrum, luminance, colour coordinates, colour temperature, and CRI values from LED, OLED, LCD, and other light sources. It is ideal for lighting engineers, display testing, LED validation, quality control, and field measurements where portability and ease of use are important.
The A-100 uses MEMS micro-grating technology, which significantly reduces the size and manufacturing cost compared to traditional laboratory spectroradiometers. This allows users to access professional spectral measurement capabilities at a more affordable price point without sacrificing essential measurement accuracy.
The A-100 can measure a wide range of lighting and colour metrics, including spectral distribution, luminance, CCT (correlated colour temperature), CRI, CIE 1931 and CIE 1976 colour coordinates, peak wavelength, and TM-30 parameters such as Rf and Rg.
The Ai101 computes a wide range of lighting quality metrics including TLCI, TM-30 values (Rf and Rg), CQS, CRI, CCT, D_uv, SDCM-related colour consistency evaluation, chromaticity coordinates, and additional spectral parameters. These metrics help users assess not only brightness, but also colour fidelity, saturation, consistency, and suitability for professional applications such as film, broadcasting, architectural lighting, and product testing.
Yes. The Ai101 is a fully stand-alone instrument with a built-in processor and 4.3-inch touchscreen. Users can perform measurements, review spectra, inspect calculated values, and save data directly on the device. A PC is only needed for extended analysis, data management, or generating more formal reports through the companion software.
The A-100 provides many of the core measurement capabilities found in larger laboratory spectroradiometers, but in a smaller and more affordable handheld format. While high-end laboratory systems may offer greater sensitivity and advanced automation, the A-100 delivers an excellent balance of portability, accuracy, and cost-effectiveness for everyday spectral measurement tasks.
The cosine-corrected diffuser helps the sensor respond more accurately to light arriving from different angles. This improves illuminance measurement because real-world lighting rarely strikes the sensor from one perfectly straight direction. By following cosine response behaviour, the Ai101 provides readings that better represent the illumination falling on a surface in practical environments.
Yes. The Ai101 is designed for portability, with a 350 g body, a rechargeable 3350 mAh Li-ion battery, and compact dimensions of 150 × 97 × 32 mm. It also includes M6 and 1/4″-20 UNC threaded mounting interfaces for use on tripods or fixtures. These features make it practical for mobile work in studios, on-site surveys, and other professional field applications.
