BUCHI NIR-Online X-One (One-Six) In-Line Near-Infrared Spectrometer

Overview

The BUCHI NIR-Online X-One (One-Six) is an industrial-grade, in-line near-infrared spectrometer engineered for continuous, non-destructive process monitoring in demanding manufacturing environments. Based on diode array detection and fixed-grating optical architecture, it operates on the principle of absorption spectroscopy in the short-wave near-infrared (SW-NIR) region—specifically optimized for the 900–1700 nm spectral window, where overtones and combination bands of C–H, O–H, and N–H bonds yield quantitatively robust calibration responses. Unlike laboratory-based benchtop systems, the X-One is designed for permanent integration into production lines—including conveyor belts, screw feeders, mixers, and extruders—enabling real-time compositional feedback without sample extraction or delay. Its compact form factor (220 × 220 × 135 mm), ruggedized IP65/IP67-rated housing, and integrated temperature stabilization system ensure operational stability across ambient fluctuations from −10°C to +40°C and process temperatures up to +70°C. The instrument supports both diffuse reflectance and transmission measurement geometries via interchangeable optical probes, making it suitable for heterogeneous solid streams (e.g., granular feed, pellets, flakes) as well as flowing liquids and semi-solids.

Key Features

• Real-time spectral acquisition at 100 Hz—enabling high-fidelity dynamic process profiling with 10 ms measurement time (advanced version)
• Integrated HD CCD imaging system co-registered with spectral data, delivering spatially resolved chemical mapping at 80 µm resolution in the visible domain
• Dual tungsten-halogen light source with 18,000-hour MTBF ensures long-term photometric stability and minimizes maintenance intervals
• Optimized optical spot size of 30–40 mm provides representative sampling across heterogeneous material flows, reducing bias from particle segregation
• Explosion-proof variants available (ATEX/IECEx Class II 1/2D, Ex px T4) for installation in hazardous zones common in oilseed crushing, biodiesel synthesis, and grain handling facilities
• Robust mechanical design: nickel-plated stainless steel enclosure, aluminum heat sink, and NBR seals withstand vibration (0.2 g, 0.1–150 Hz), pressure surges (30 bar at flange), and aggressive ambient conditions
• Self-regulating thermal management maintains detector and optical path stability during extended unattended operation

Sample Compatibility & Compliance

The NIR-Online X-One accommodates a broad spectrum of industrial materials without preprocessing: whole grains, protein meals, oilseeds, animal feed pellets, vegetable oils, biodiesel blends, polymer melts, and pharmaceutical granules. Its diffuse reflectance mode is validated for particulate solids with particle sizes ranging from 100 µm to >10 mm; transmission mode supports clear to moderately turbid liquids (e.g., crude oil fractions, ethanol-water mixtures). All configurations comply with IEC 61326-1 (EMC for industrial environments), IEC 61000-6-2/-4 (immunity standards), and optionally meet ATEX 2014/34/EU and IEC 60079-0/-10-1 for explosive atmospheres. For regulated industries, the SX-Plus software platform supports audit trails, user access control, electronic signatures, and data integrity features aligned with FDA 21 CFR Part 11 and EU Annex 11 requirements when deployed in GMP-compliant environments.

Software & Data Management

The BUCHI SX-Plus chemometrics suite provides end-to-end workflow support—from method development and calibration transfer to real-time prediction and multivariate statistical process control (SPC). It supports PLS, PCR, and PCA algorithms with built-in cross-validation, outlier detection, and residual analysis tools. Spectral data are timestamped, geotagged (when integrated with PLC/HMI), and stored in vendor-neutral HDF5 format for interoperability with MES/SCADA platforms (e.g., Siemens SIMATIC IT, Rockwell FactoryTalk). Raw spectra, prediction outputs, and imaging metadata are archived with SHA-256 checksums and configurable retention policies. Remote diagnostics and firmware updates are supported via secure TLS-encrypted Ethernet connection, enabling proactive technical support from BUCHI’s global engineering team.

Applications

• Feed & Oilseed Processing: Real-time monitoring of moisture, protein, oil, and fiber content in soybean meal, rapeseed cake, and corn gluten during drying, grinding, and pelleting
• Biodiesel Production: In-line quantification of FAME content, glycerol residuals, and oxidation stability indicators in transesterification reactors and purification columns
• Food & Beverage: Continuous assessment of sugar concentration, dry matter, and adulteration in juice concentrates, dairy powders, and cocoa liquor
• Pharmaceutical Manufacturing: PAT-enabled monitoring of blend uniformity, API concentration, and moisture in fluid bed dryers and continuous twin-screw granulators
• Chemical & Polymer Industry: Tracking monomer conversion, additive dispersion, and thermal degradation markers in extrusion and polymerization lines

FAQ

What is the minimum required sample flow velocity for reliable measurement?
For optimal signal-to-noise ratio and spatial averaging, the recommended product velocity is ≤1 m/s when using the integrated imaging module; higher velocities may be accommodated with custom probe geometry.
Can the X-One be calibrated using existing laboratory NIR models?
Yes—SX-Plus includes spectral standardization tools (e.g., piecewise direct standardization, slope/bias correction) to transfer calibrations developed on FT-NIR or dispersive benchtop instruments with traceable validation protocols.
Is remote support available for method troubleshooting?
BUCHI offers 24/7 remote assistance via secure VPN access to instrument diagnostics, spectral logs, and calibration history—staffed by application scientists fluent in English, German, and Mandarin.
How is spectral drift compensated during long-term deployment?
The system employs internal reference channels, dual-lamp redundancy, and periodic dark-current correction routines synchronized with process downtime windows.
Does the instrument support integration with DCS or MES systems?
Yes—native OPC UA and Modbus TCP interfaces enable bidirectional data exchange with Emerson DeltaV, Honeywell Experion, and SAP ME/Manufacturing Execution systems without middleware.