Process Analytical Technology

Process Analytical Technology (PAT) supports real-time monitoring and control in modern manufacturing. By enabling early process insight, PAT helps manufacturers improve product quality, reduce downtime, and support more efficient, consistent production.

What is Process Analytical Technology (PAT)?

PAT is a framework for designing, analyzing, and controlling manufacturing processes through real-time measurements of critical quality attributes and process parameters. PAT relies on accurate, fast, and selective measurement technologies, many of which use photonic components to enable non-contact, high-speed analysis for industrial process monitoring.

PAT 1: Reactant concentration and flow rate monitoring, PAT 2: Reaction progress and speed monitoring,

PAT 3: Product quality and output rate monitoring, PAT 4: Waste concentration and emissions monitoring

Facing the challenges of modern production

In production and manufacturing, businesses encounter a series of challenges that can impede progress and compromise quality. The detection of low-concentration gases and trace contaminants remains a critical hurdle. A system capable of stable monitoring in even the most extreme conditions is needed to overcome this.

As industries shift from traditional batch production to more dynamic or continuous systems, adaptable and reliable monitoring solutions become increasingly necessary. These changes represent not only an effort to remain current but also an opportunity to drive significant advancements.

Measurement and analysis solutions for key industries

Advanced process monitoring technologies support a wide range of industries, including chemical manufacturing, pharmaceuticals, energy production, biotechnology processes, and the cosmetic industry, where reliable measurement is essential for quality, safety, and process control.

Addressing industry challenges

Many industries share common challenges, including:

Detection limits for low-concentration gases and trace contaminants
Maintaining continuous, real-time monitoring sometimes under harsh conditions
High maintenance costs
Integration complexity with existing systems

To address these demands, PAT systems require highly stable light sources, sensitive detectors, and reliable spectroscopic technologies tailored to the process environment and measurement objective.

The benefits of advanced monitoring solutions

Adopting advanced monitoring technologies into your process systems brings significant benefits:

Detect process deviations in real-time
Improve product quality and safety
Reduce downtime
Minimize waste through automated critical process parameters (CPP)
Enable true in-line, continuous analysis without sampling delays

Optical sensing techniques for process monitoring

Technique / Application	What it Does	Key Benefits	Typical Applications	Relevant Technologies / Products
Single-Gas Detection	Enables highly selective optical gas detection using absorption spectroscopy	Real time monitoring High selectivity & sensitivity Stable, repeatable measurements	Trace gas monitoring Process control Emissions & safety monitoring	DFB lasers, DFB QCLs, gas cells, detectors
Multi Gas Detection	Measures multiple gas species simultaneously at different wavelengths	Simultaneous multi‑gas analysis Reduced interference Useful for compact system design	Complex process streams Environmental & emissions monitoring	Multiple DFB lasers, DFB QCLs, gas cells, detectors
Liquid Molecular Detection	Detects molecular components directly in liquids using mid IR absorption	No gas cell required Strong absorption signals Real‑time process insight	Chemical process control Pharmaceutical & food manufacturing	Tunable QCLs, DFB QCLs, Mid-IR sources & detectors
Raman Spectroscopy	Continuous monitoring of liquid interfaces and complex formulations	Non destructive Minimal sample preparation Real time insight	Pharmaceutical quality assessment of raw materials and finished products	Spectroscopic modules, InGaAs CMOS & CCD linear image sensors, Laser diodes
Near-Infrared Spectroscopy	Analysis of tablets and powders	Rapid analysis Non-destructive	Active Pharmaceutical Ingredient (API) quantification and moisture content measurement.	FTIR-NIR spectromters, Mini-spectrometer, InGaAs image linear sensors, Optical moisture sensors

Our process analysis technologies

Our range of light sources, detectors, and spectroscopic systems offer modular and scalable integration into PAT systems.

Light sources

Quantum cascade lasers (QCL)

Light & radiation sources

Detectors

Infrared detectors

Image sensors

Image sensor modules

Spectrometers

Mini-spectrometers

Raman spectroscopic module

Mini-spectrometer micro series C16767MA

Why choose Hamamatsu for PAT?

Hamamatsu provides the enabling technologies behind advanced process monitoring systems. As one of few manufacturers of both light sources and detectors, we are uniquely positioned to support integrated PAT system design.

Key advantages include:

Broad spectral expertise: UV, visible, NIR, Raman, and mid-infrared
Component-level excellence: Light sources, detectors, and spectrometers from a single partner
High precision, stability, and long-term reliability for continuous industrial operation
Robust performance in demanding environments, including harsh process conditions
Flexible integration into custom and existing systems
Proven photonics expertise supporting demanding analytical applications

By combining deep photonics knowledge with a broad technology portfolio, Hamamatsu enables tailored solutions for diverse PAT applications.

Applications in gas monitoring and process control

QCL-based measurement technologies support fast, selective, real-time measurement to support monitoring, safety, compliance, and process optimization applications such as:

Continuous emissions and environmental air monitoring for regulated gases
Gas quality verification and composition measurement (e.g., in production or distribution)
Process control and optimization via real-time gas concentration feedback
Safety monitoring, leak detection or abnormal-condition detection in hazardous environments
Chemical process control
Pharmaceutical quality and content assessment
Food manufacturing quality control
Compliance-focused measurement where stable, low-detection measurements are required

If you need help selecting the right optical components for your process monitoring system, contact us to discuss your application requirements.