UPRtek MK350D Portable Spectroradiometer

Overview

The UPRtek MK350D Portable Spectroradiometer is a compact, handheld optical measurement instrument engineered for rapid, field-deployable spectral analysis of visible light sources. Operating on the principle of linear CMOS array-based spectrometry, it captures full spectral power distributions (SPDs) across the photobiologically relevant 380–780 nm range with 1 nm data resolution and an optical bandwidth (FWHM) of approximately 12 nm. Designed for metrological rigor in non-laboratory environments, the MK350D delivers traceable photometric and colorimetric quantification—including correlated color temperature (CCT), illuminance (lx), CIE 1931 (x,y) and CIE 1976 (u′,v′) chromaticity coordinates, general color rendering index (CRI Ra), and percent flicker—without requiring external calibration hardware. Its ultra-compact form factor (90 × 30 × 32.2 mm, 70 g) enables one-handed operation during on-site lighting audits, luminaire validation, or classroom demonstrations, bridging the gap between benchtop-grade spectral fidelity and true portability.

Key Features

• World’s smallest commercially available handheld spectroradiometer, optimized for ergonomic single-hand use in constrained or mobile workspaces.
• Integrated 27 photometric and colorimetric calculation modes compliant with CIE, IES, and ISO/CIE joint standards—including flicker metrics (percent flicker, frequency, modulation depth) aligned with IEEE 1789-2015 guidelines for human-centric lighting safety.
• High-stability optical path with thermally compensated CMOS linear sensor ensures wavelength repeatability within ±1 nm and chromaticity reproducibility of ±0.0005 (2σ) under standard illuminant A conditions.
• Bluetooth 4.0 wireless interface supports real-time data streaming and remote control from iOS and Android devices via UPRtek’s official mobile application—enabling live spectral visualization, comparative analysis, and annotation without physical tethering.
• Dedicated PC software (Windows/macOS) provides advanced post-processing capabilities: spectral normalization, binning, custom metric derivation, multi-sample statistical comparison, and GLP-compliant report generation with embedded metadata (timestamp, GPS coordinates*, operator ID, instrument serial number).

Sample Compatibility & Compliance

The MK350D is validated for quantitative evaluation of steady-state and time-modulated visible-light emitters—including LED modules, OLED panels, fluorescent tubes, HID lamps, and architectural luminaires—under ambient or controlled illumination conditions. Its spectral response conforms to the CIE 1931 photopic luminosity function V(λ) with <±5% deviation across 380–780 nm. All photometric outputs meet the accuracy tolerances specified in IES LM-79-19 Annex B for portable spectroradiometers. The device supports audit-ready data integrity through timestamped Excel exports (UTF-8 encoded, UTF-16 compatible), and its firmware architecture permits optional firmware updates to maintain alignment with evolving CIE technical reports (e.g., CIE 015:2018, CIE S 025/E:2015). While not certified for regulatory compliance testing per se, its measurement uncertainty profile satisfies pre-compliance verification requirements for ENERGY STAR, DLC, and EU Ecodesign Directive Annex IV assessments.

Software & Data Management

Data acquisition, visualization, and reporting are unified through two interoperable platforms: the UPRtek Mobile App (iOS/Android) and SpectraMagic PC Suite. The mobile app enables immediate spectral capture, side-by-side comparison of up to four spectra, and on-device calculation of flicker parameters per IEC TR 61000-3-3 Ed. 3.0. The PC software extends functionality with batch processing, spectral smoothing (Savitzky-Golay filters), user-defined metric scripting (via Lua API), and automated report templates compliant with ISO/IEC 17025 documentation practices. All exported files include embedded EXIF-style metadata, supporting traceability in GLP and GMP-aligned workflows. MicroSD storage (8 GB) retains ≈1.2 million individual measurements in native .csv format, with automatic file rotation and write-protection options to prevent accidental overwrites.

Applications

• Commercial lighting design: Real-time validation of CCT consistency, spatial uniformity, and flicker performance during installation and commissioning.
• Luminaire manufacturing QA/QC: In-line spectral verification of LED binning, phosphor consistency, and driver-induced temporal artifacts.
• Academic instruction: Hands-on pedagogy in photometry, color science, and human factors engineering—supporting lab exercises on SPD decomposition, metamerism, and circadian stimulus modeling.
• Architectural lighting specification: Objective assessment of color fidelity, glare potential, and temporal light modulation prior to client presentation or tender submission.
• Lighting retrofit auditing: Quantitative baseline characterization of legacy installations against modern energy-efficiency and WELL Building Standard v2 lighting criteria.

FAQ

Is the MK350D suitable for measuring UV or IR radiation?
No. The MK350D is strictly limited to the visible spectrum (380–780 nm) and does not incorporate UV-enhanced or extended-NIR sensor coatings.
Does the device require annual factory recalibration?
UPRtek recommends biennial calibration against NIST-traceable standards for applications demanding metrological continuity; however, built-in self-diagnostics and reference lamp validation routines support extended field stability.
Can measurement data be integrated into LMS or BIM platforms?
Yes—CSV exports are structured for direct ingestion into common lighting management systems (LMS) and compatible with IFC-based BIM workflows via third-party ETL pipelines.
What is the minimum measurable illuminance level?
The lower limit is 70 lx at integration times ≥100 ms; below this, signal-to-noise ratio degrades beyond ±5% illuminance uncertainty thresholds.
Is Bluetooth connectivity secure for enterprise deployment?
The MK350D implements Bluetooth SIG-standard pairing authentication and supports encrypted local data transfer; no cloud synchronization occurs unless explicitly enabled by the user via the PC software.