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ITEMLIST
Products Infomation
- Products by Category
- Electronic Measuring Instruments
- Optical Related Measuring Instruments
- Sekonic Spectrometer C-4000
Portable Lighting Spectrometer
U.S.-based sales, and delivery available.
The Sekonic C-4000 Spectrometer is a compact portable lighting measurement instrument designed for lighting designers, engineers, and field technicians. It measures color temperature (1,600–40,000K), illuminance, CRI, TM-30 color rendering, Δuv, and chromaticity coordinates. With Bluetooth connectivity and the SEKONIC LD smartphone app, users can perform remote measurements, visualize spectral data, and generate lighting reports directly from a mobile device.
Use Cases / Applications
Lighting Quality Evaluation and Spectral Analysis
This spectrometer is designed for professionals who need accurate measurement and evaluation of lighting quality in commercial, architectural, and research environments.
Indoor Lighting Evaluation
Measure and evaluate illuminance, correlated color temperature (CCT), and color rendering (CRI) for indoor lighting systems such as:
・Retail lighting and showroom illumination
・Commercial and architectural lighting design
・Restaurant and hospitality lighting environments
The device enables lighting designers and engineers to optimize lighting conditions and ensure consistent visual quality.
Museum and Office Lighting Management
Ideal for monitoring and managing lighting environments in sensitive spaces such as:
・Museums and art galleries
・Office lighting environments
・Exhibition and display lighting
Accurate measurement helps maintain proper illumination levels while protecting artworks and improving visual comfort.
Recommended Users
This lighting spectrometer is recommended for professionals involved in lighting design, evaluation, and optical research.
Lighting and Architectural Professionals
・Lighting designers
・Lighting installation contractors
・Interior designers and architectural lighting planners
Research and Quality Control Engineers
・LED and OLED lighting development
・Projector and display technology testing
・Optical measurement and product quality evaluation
Photography and Studio Professionals
・Film and photography studios
・Broadcast and content production environments
SEKONIC C-4000 SPECTROMETER
Specifications
| SKU: | 401-400 |
| Family: | C-4000 |
| Sensor: | CMOS linear image sensor |
| Measuring System: | Spectro Meter |
| Incident light | |
| Measuring Range and Modes: | |
|---|---|
| Measurement range *1: | Wavelength: 380nm to 780nm |
| Illuminance: 5lx to 10,000lx (0.46fc to 929fc) | |
| Color Temperature (Tcp): 1,600K to 40,000K | |
| Color Rendering Properties: | |
| CRI Ra -100.0 to 100.0 | |
| TM-30 Rf 0 to 100, Rg 0 to 200 | |
| Accuracy (Light source A): | Illuminance: +/-5% +/-1 digit (5 lx to 3,000 lx), |
| +/- 7.5 % +/- 1 digit (over 3,000 lx) | |
| x,y: +/-0.003 (800lx) | |
| Repeatability (2σ, Light source A):: | Illuminance: 1 % + 1 digit (30 lx to 10,000 lx), 5 % + 1 digit (5 lx to 29.9 lx) |
| x, y: 0.001 (500 lx to 10,000 lx) | |
| x, y: 0.002 (100 lx to 499 lx) | |
| x, y: 0.004 (30 lx to 99.9 lx) | |
| x, y: 0.008 (5 lx to 29.9 lx) | |
| Spectral response characteristics (f1): | 9% or less |
| Oblique incident light characteristics (f2): | 12% or less |
| Temperature characteristics: | Illuminance: +/- 5% |
| x,y: +/-0.006 (Light source A, 1,000lx) | |
| Humidity characteristics: | Illuminance: +/- 3% |
| x,y: +/-0.006 (Light source A, 1,000lx) | |
| Measurement time: | Max. 15sec, Min. 2sec |
| Display value: | Illuminance (lx/fc), Tcp*2 (K), uv, CRI (Ra), TM-30 (Rf, Rg), Chromaticity coordinates (x, y) |
| Other functions: | Data memory up to 99 items, Auto power-off, Auto dimmer |
| Language: | English, French, German, Italian, Spanish, or Japanese |
| Physical: | |
| Operating Temperature: | 5 deg.C to 35 deg.C, without condensation |
| Storage Temperature: | -10 deg.C to 60 deg.C, 85 % RH or less (at 35 deg.C), without condensation |
| Power Source: | AA battery (1.5V) x 2, USB bus-power |
| Interface: | USB connector (type C), Bluetooth |
| Operating humidity: | 85% or less (at 35 deg.C), without condensation |
| Product Weight: | 0.3 (lb) / 0.14 (kg) |
| Product Height: | 5.5 (in)/ 14 (cm) |
| Product Length: | 1.18 (in)/ 3 (cm) |
| Product Width: | 2.44 (in)/ 6.2 (cm) |
| *1: “Under” is displayed when the illuminance is less than 5 lx (0.46 fc) or the Tcp is less than 1,600 K, and “Over” is displayed when the illuminance is over 10,000 lx (929 fc) or the Tcp is over 40,000 K. *2: Tcp is Temperature de Couleur Proximale (Correlated Color Temperature). |
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