AOTF-NIR
We make world-class NIR spectrometers using our core Acousto-Optic Tunable Filter (AOTF) technology specially designed for Process Analytical Technology (PAT) and in-line/at-line analysis and have been doing so for four decades. Let us help you get the data you need with our extensive line of instruments.
AOTF-NIR Spectrometers
Brimrose designs and builds ruggedized AOTF‑NIR Spectrometers as Process Analytical Technology (PAT) tools, delivering fast‑responding analysis for a wide range of industrial process applications. Our systems are designed to meet individual customer requirements and environmental constraints, helping improve production efficiency, product quality, and process consistency. We specialize in at‑line, in‑line, and multi‑purpose Near‑Infrared (NIR) spectrometers that are adaptable and flexible to support evolving operational needs.
Additional details on available NIR spectrometer models are provided in the product section.
Core Principles of Near‑Infrared Technology
What NIR Technology Measures
Near‑infrared spectroscopy operates in the 700–2500 nm region, capturing broad molecular absorption patterns that rapidly measure chemical and physical properties of materials without damaging the sample. Because NIR is rapid and non‑destructive, it has become a powerful tool for quality assurance, material identification, and process monitoring.
What Accurate NIR Analysis Requires
Because these signals are weak, overlapping, and sensitive to drift, accurate NIR analysis requires stable wavelength control to prevent spectral drift, consistent spectral output for reliable measurements, and robust chemometric models built through data collection, data processing, calibration, and prediction.
Instrument Design Variations
NIR spectrometers come in different designs—FT‑NIR, grating, diode‑array, and filter‑based. These designs differ in:
stability
measurement speed
long‑term repeatability
These variations lead to performance differences that affect how well each instrument supports real‑world NIR applications.
AOTF‑NIR Technology
Our AOTF‑NIR spectrometers use an acousto‑optic tunable filter—the core device underlying AOTF technology—to select wavelengths rapidly and without moving parts, enabling fast and precise wavelength control across the NIR range. Its solid‑state design delivers stable, drift‑resistant spectra with continuous reference correction for consistent long‑term performance. Compared with FT‑NIR, grating, diode‑array, and filter‑based NIR systems, AOTF‑NIR offers faster tuning, higher repeatability, and stronger resistance to vibration and temperature changes—ideal for quality assurance and process monitoring.
AOTF-NIR Representation
Core Performance Characteristics
AOTF‑NIR spectrometers deliver stable, reliable measurements based on several key performance characteristics.
Solid State – no moving parts, therefore it is immune to ambient vibration
Faster – up to 10 measurements / second and capable to scan up to 16,000 wavelengths per second, therefore can get up to 30 scans per second across the whole wavelength range (1100-2300 nm)
Customized for Purpose (ATEX / UL / IPxx)
Sensitive – delivers higher spectral resolution with an excellent signal‑to‑noise ratio
Immune to Ambient Light – no need to block ambient light from the sample
Real-Time Dual Beam Reference – no drifting, excellent wavelength repeatability, no need to recalibrate the device
Each Brimrose standard AOTF‑NIR Spectrometer includes a set of configuration options, with several items also serving as starting points for deeper customization. These options support different installation needs, operating setups, and optical requirements across laboratory, process, and field environments.
Standard spectrometers include Battery Ready design, Lab Stand, Trigger, Mounting Plate, and Communication Interfaces.
Standard and Custom-Built NIR Spectrometer Models
Standard NIR Spectrometers
Luminar 3060
16 Channel Multiplexer for In-Line / At-Line Applications
Luminar 4010
Single Point Fiber with Probe or Flow Cell for In-Line / At-Line Applications
Luminar 4030
Free Space In-Line Spectrometer
Luminar 4090
Lightweight Blending Spectrometer
Luminar 5030
Flexible Use - Handheld, Lab (with a Lab Stand), or Even Mounted In-Line
Luminar 7030
Free Space with Separate Optics for Tight Spaces for In-Line / At-Line Applications
Luminar 3076
”Seedmeister” for Analyzing and Sorting Seeds & Peanuts
Luminar 3070
Flexible Use Laboratory Spectrometer
Luminar 4020
Thin Film Analyzer
More detailed information, including standard configuration options, is available in the product catalog.
Key Application Highlights
Explore Process Applications
Brimrose Software and User Manuals
Available for Download
All revisions or updates are documented. A download password and any required instructions will be provided to you.
Resource Center
Explore our Resource Center for AOTF‑NIR Spectrometers to access product demonstrations and supporting materials. The center includes solution and application notes, videos, product specification sheets, white papers, a solutions catalog, and answers to frequently asked questions (FAQ).