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Gas analyzer

Gas analyzer

Gas analysis is used in many fields, including environmental monitoring, process control, energy, and health. Gas analysis based on the absorption of gases at specific wavelengths (UV/visible and infrared) has advantages over other methods, such as non-contact measurement and high selectivity.

Many gases have absorption wavelengths in the near- and mid-infrared (NIR and MIR) region, attributed to the vibration of gas molecules. We offer light sources and detectors for detecting and measuring the concentration of gases.

Lineup of light sources and detection elements

Selection of light sources and detection elements

Light sources

Mid Infrared LED (MWIR-LED)

  • Wavelength: 3.3 μm (CH₄), 3.9 μm (reference light), and 4.3 μm (CO₂) are provided.
  • Higher output, higher reliability, lower power consumption, faster response than lamps

→ For relatively simple sensors

Quantum Cascade Laser (QCL)

  • Wavelength:4 μm to 10 μm band
  • High resolution, high output, high reliability, high-speed response

→ For minute, high accuracy gas detection

Xenon Flash Lamp (Xe-F)

  • Wavelength: 0.2 μm to 5.0 μm (continuous spectrum)
  • High output pulse emission in the microsecond order
  • Long life

→ For multiple gas detection

Light source Wavelength range Output Time response characteristics Power consumption Lifetime Price
MWIR-LED Narrow ☆☆ ☆☆☆ ☆☆☆ ☆☆☆ ☆☆☆
QCL Line spectrum ☆☆☆☆ ☆☆☆ ☆☆ ☆☆
Xe-F Wide ☆☆☆ ☆☆ ☆☆ ☆☆
Filament Lamp Wide ☆☆ ☆☆ ☆☆☆☆


InAsSb Photovoltaic Detector (quantum type detector)

  • High sensitivity, high-speed response

→ For relatively simple sensor Used in pairs with an LED
For applications that require relatively high accuracy Used in pairs a QCL

Thermopile (thermal type detector)

  • Covers a wide wavelength range, inexpensive
  • Can support band-pass filters for CH₄,CO₂, and reference light

→ For relatively low-end applications

Detector Sensitivity Wavelength dependence Time response characteristics Cooling Price
Quantum type ☆☆☆ Yes ☆☆☆ Cooling (partially not required) ☆☆
Thermal type ☆☆ None ☆☆ Non-cooled ☆☆☆

Recommended products

Mid-infrared LEDs

Mid-infrared LEDs having high output with peak emission wavelengths of 3.3, 3.9, and 4.3 μm are available in metal or compact ceramic packages. For detection elements, use quantum detectors such as InAsSb photovoltaic detectors.

Quantum cascade lasers (QCL)

Quantum Cascade Lasers are semiconductor lasers that offer peak emission in the mid-IR range (4 μm to 10 μm). They have gained considerable attention as a new light source for mid-IR applications such as molecular gas analysis including environmental measurement.

InAsSb photovoltaic detectors

InAsSb photovoltaic detectors deliver high sensitivity in the 5 μm, 8 μm, and 10 μm band due to our unique crystal growth technology.

Thermopile detectors

To meet diverse application needs, we offer a variety of thermopiles, including single-element type and dual-element type.

Xenon flash lamps

Xenon flash lamps are more compact than continuous mode lamps and known to accumulate less heat. They provide a high-intensity continuous spectrum from ultraviolet light, to visible light, to infrared light. After improving electrode construction and materials, Hamamatsu’s xenon flash lamps now offer 5 times more arc stability and 10x longer life than the conventional lamps.

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