Ocean Optics FLAME-NIR Portable Near-Infrared Spectrometer

Overview

The Ocean Optics FLAME-NIR is a compact, portable near-infrared (NIR) spectrometer engineered for robust field-deployable and benchtop quantitative analysis in the 950–1650 nm spectral region. Based on a thermoelectrically uncooled 128-pixel InGaAs linear detector array, the FLAME-NIR eliminates the power, thermal management, and mechanical complexity associated with cooled detectors—enabling ultra-low power consumption (<1.5 W), rapid thermal stabilization, and intrinsic resistance to condensation and vibration-induced drift. Its optical architecture follows a Czerny-Turner design optimized for NIR throughput and stray-light suppression, delivering consistent radiometric performance across the full wavelength range. The spectrometer operates on standard USB bus power, requiring no external power supply or cooling infrastructure—making it ideal for integration into handheld analyzers, process monitoring nodes, and mobile laboratory platforms where size, weight, and energy efficiency are critical constraints.

Key Features

• Uncooled InGaAs Detection: Eliminates TEC requirements while maintaining >6000:1 SNR (full signal) and stable dark current behavior over ambient temperature ranges (15–35 °C).
• Modular Optical Bench: Interchangeable slit options (10–200 µm) allow user-tuned trade-offs between spectral resolution (~10 nm FWHM typical) and optical throughput without hardware recalibration.
• High-Speed Acquisition: Capable of continuous acquisition at up to 400 full-spectrum scans per second, with programmable integration times spanning 1 millisecond to 65 seconds—supporting both transient kinetic measurements and high-dynamic-range static sampling.
• Plug-and-Play USB Interface: Micro-USB 2.0 connection enables direct communication with Windows, macOS, and Linux systems; supports HID-class enumeration for seamless driverless operation in embedded applications.
• Low Inter-Unit Variability: Factory-calibrated wavelength and intensity response with <±0.5 nm wavelength accuracy and <±3% photometric repeatability across production lots—ensuring measurement consistency in multi-instrument deployments.
• Compact Form Factor: Dimensions of 89.1 × 63.3 × 34.4 mm and mass of only 265 g facilitate integration into space-constrained enclosures, robotic arms, or handheld housings compliant with IP54-rated accessories.

Sample Compatibility & Compliance

The FLAME-NIR is designed for non-destructive, contactless or fiber-coupled transmission/reflectance measurements of solid, semi-solid, and liquid samples. It interfaces seamlessly with Ocean Insight’s suite of NIR-compatible light sources (e.g., HL-2000-NIR, DH-MINI-NIR), integrating spheres (ISP-REF-NIR), probe holders (QP-NIR), and cuvette stands (CUV-ALL-NIR). All optical path components—including SMA 905 fiber connectors—are optimized for minimal OH-absorption loss in the 1400–1500 nm water vapor band. The instrument complies with IEC 61326-1 (EMC for laboratory equipment), meets CE and FCC Class B regulatory requirements, and adheres to RoHS Directive 2011/65/EU. While not certified for GMP environments out-of-the-box, its stable calibration traceability (NIST-traceable tungsten-halogen and deuterium lamp references), audit-ready firmware logging, and compatibility with 21 CFR Part 11–compliant software frameworks (e.g., OceanView with optional audit trail module) support qualification under GLP and regulated QC workflows.

Software & Data Management

OceanView spectroscopy software provides real-time spectral visualization, baseline correction, peak identification, and export to CSV, TXT, or HDF5 formats. For chemometric modeling, the FLAME-NIR is fully supported by Ocean Insight’s NIR Tools package—featuring PLS, PCA, and SVM regression engines with cross-validation, outlier detection, and model persistence (.nirmodel format). Raw data streams are accessible via the Ocean SDK (C/C++, Python, .NET, LabVIEW), enabling custom integration with LIMS, SCADA, or industrial IoT platforms. All spectral acquisitions include embedded metadata (timestamp, integration time, detector temperature, lamp status), facilitating FAIR (Findable, Accessible, Interoperable, Reusable) data practices in research and quality control documentation.

Applications

• Moisture content quantification in grains, seeds, and powdered pharmaceuticals using 1450 nm and 1940 nm water absorption bands.
• In-line fat/oil concentration analysis in dairy, meat, and vegetable oil processing via 1210 nm and 1730 nm C–H stretch harmonics.
• Blend uniformity assessment of active pharmaceutical ingredients (APIs) in tablet formulations using multivariate spectral fingerprinting.
• Soil organic carbon and nitrogen estimation in precision agriculture through partial least squares regression on diffuse reflectance spectra.
• Quality sorting of polymer pellets and recycled plastics based on NIR spectral signatures of additive packages and degradation markers.
• Real-time fermentation monitoring via glucose/lactate absorption trends in bioreactor broth (fiber-optic dip probe configuration).

FAQ

Does the FLAME-NIR require external cooling or temperature stabilization?
No. It uses an uncooled InGaAs detector optimized for ambient operation (15–35 °C); no TEC, fan, or chiller is required.
Can the wavelength range be extended beyond 1650 nm?
The standard FLAME-NIR is factory-configured for 950–1650 nm. Custom variants covering 900–1700 nm are available upon request, subject to optical alignment and detector quantum efficiency validation.
Is spectral calibration traceable to NIST standards?
Yes—each unit ships with wavelength and irradiance calibration certificates traceable to NIST SRM 2035 (tungsten-halogen) and SRM 2036 (deuterium), with documented uncertainty budgets.
What is the minimum detectable absorbance change in transmission mode?
At 1-second integration and optimal SNR conditions, the system achieves an absorbance noise floor of <0.002 AU (rms) in the 1100–1500 nm range.
How is inter-unit reproducibility maintained across production batches?
Each spectrometer undergoes individual optical characterization and calibration; spectral response variation is limited to ±3% intensity and ±0.5 nm wavelength shift across the product line—verified per ISO/IEC 17025-compliant internal QA procedures.