GA-370 provides constant, ultrahigh-sensitivity and high-precision monitoring of trace impurities (CO, CO₂ and CH₄) for quality control at gas manufacturing and separation facilities.

Detects trace impurities for ultra‑pure gas QC

High Sensitivity

Wide Gas Compatibility 

Stable Zero Drift 

User‑Friendly Interface 

GA-370

Continuous CO, CO₂ & CH₄ tracking to prevent distillation unit plugging

Air Separation Plant PPU Monitoring

Quality control of N₂ & O₂ in fab supply

Semiconductor Gas Purity Assurance

Ensures trace impurity compliance in O₂ & N₂ cylinders

Medical Gas Cylinder QC

On‑site H₂ impurity measurement for FCV fueling stations

Hydrogen Fuel Cell Check

Reference Gas Generation Labs

Detects CO₂ & CH₄ in fuel reactivity studies

Coal & Fuel Trace Gas Monitoring

HORIBA's measurement and analytical solutions contribute to the optimization of all industrial processes. We support our valuable customers facing challenges such as improvement of productivity and safety, saving energy and reduction of pollution. This is well connected to protection of environment health such as air and soil quality, climate change, radiation exposure and human health eventually. We address emerging issues such as CCUS, microplastics, and PFAS (gas monitoring), which are gaining attention worldwide. As a primary solution partner, we work with the industrial sector to optimize processes, governments to set standards, and academia to drive scientific and technological innovation for sustainable industrialization and environmental protection.

Industrial Process & Environment

The IT-270 is a built-in non-contact infrared thermometer offering industry-leading accuracy and customizable measurement temperature, wavelength selection, and viewing characteristics in a compact footprint.

IT-270

The ENDA-5000 Series are compact stack gas analysis systems offering continuous, simultaneous, high‑precision measurement of NOₓ, SO₂, CO, CO₂, O₂, CH₄, and N₂O using drift‑free cross‑modulated NDIR and magneto‑pneumatic detectors. Featuring an intuitive touch‑panel interface and easy‑maintenance design, they ensure reliable emissions monitoring for boilers, incinerators, and power plants.

ENDA-5000 Series

The APMA-370 continuously monitors CO concentrations in ambient air using cross‑flow non‑dispersive infrared (NDIR) absorption with an internal dry‑method sampling device, delivering high sensitivity and accuracy with minimal maintenance.

APMA-370

The APOA-370 continuously monitors atmospheric ozone concentrations using a cross-flow modulated ultraviolet absorption method. Its internal dry-method sampling device allows direct analysis of unaltered gas with high sensitivity and accuracy, while the heated de-ozonizer reduces interference and moisture, extending UV lamp life. Constructed entirely of inert materials (glass/PTFE), it delivers reliable long-term ambient pollution monitoring with minimal maintenance. Multiple selectable ranges (0–0.1/0.2/0.5/1.0 ppm standard; up to 10 ppm optional) and auto/manual range switching ensure adaptability across environments.

APOA-370

The PLGA-1000 Process Laser Gas Analyzer is designed to measure hydrocarbons and other gases contained in process gases at petrochemical plants. It uses proprietary IRLAM™ technology to continuously measure low concentrations of acetylene (C2H2) and carbon dioxide (CO2) as impurities in high‑concentration methane (CH4) and ethane (C2H6), delivering high‑speed, high‑sensitivity performance.

PLGA-1000

The TX-100 is an in‑situ, probe‑type laser-based HCl analyzer for continuous, real‑time measurement of hydrogen chloride concentrations in flue gas streams. Its compact single‑flange installation and continuous moisture correction ensure high‑accuracy HCl control in incineration plants, power generation, and chemical processing.

TX-100

The APCA-370 is a high-precision analyzer for ambient carbon dioxide monitoring, featuring HORIBA’s cross-flow modulation NDIR (non-dispersive infrared) technology. Its integrated self-regenerating CO₂ purifier ensures long-term, stable, and low-maintenance operation—ideal for continuous environmental monitoring, climate research, or CO₂ leak detection.

APCA-370

The APDA-371 is a robust ambient dust (particulate matter) monitor that uses the proven principle of beta-ray attenuation on a tape filter. It provides accurate, automatic hourly measurements of PM levels—compliant with regulatory standards and engineered for reliable long-term outdoor deployment.

APDA-371

The PX‑375 delivers continuous, automated online analysis of both particulate mass (e.g., PM2.5, PM10, TSP) and elemental composition by combining beta-ray attenuation with X-ray fluorescence. Equipped with a built-in CMOS camera for filter imaging, this compact unit is ideal for rapid, accurate air pollution monitoring.

PX-375

Continuous Particulate Monitor with X-ray Fluorescence

The APHA-370 offers continuous, high-precision monitoring of total hydrocarbons (THC), methane (CH₄), and non-methane hydrocarbons (NMHC) in ambient air. Using a flame ionization detector with cross-flow modulation technology, it delivers stable, interference-free readings with minimal maintenance.

APHA-370

The APDA-372 is a sensitive ambient dust monitor engineered for both indoor and outdoor air quality assessment. It simultaneously measures multiple particulate fractions—PM1, PM2.5, PM4, PM10, TSP—alongside particle number concentration and, optionally, size distribution across 32 classes for particles sized 0.18–18 µm. The system utilizes stable LED-based optical light scattering and supports gravimetric validation via absolute filters, offering precise, real-time aerosol analysis.

APDA-372

The APNA-370 provides continuous, high-sensitivity monitoring of ambient NO, NO₂, and NOₓ using a cross-flow modulated chemiluminescence detector. It includes an integrated dry-sampling system, internal ozone generation, and sample drying—enabling low-maintenance operation and reliable, drift-free measurements suited for environmental monitoring and air quality control.

APNA-370

The APSA-370 provides continuous, high-sensitivity monitoring of ambient SO₂ using UV fluorescence detection. Its internal dry-method sampling enhances accuracy and minimizes maintenance—making it ideal for environmental air quality monitoring and industrial emission tracking.

APSA-370

The PG-300 Series delivers laboratory-grade precision in a rugged, lightweight package for field gas analysis. Capable of measuring up to five gas components—including NOₓ, SO₂, CO, CO₂, O₂, and CH₄—it combines robustness with flexibility for real-world use in challenging environments.

PG-300 series

The 51 Series comprises rugged, explosion-proof gas analyzers tailored for flammable or classified locations. Certified to major safety standards, these units use infrared, thermal conductivity, magneto-pneumatic, or paramagnetic methods to measure CO, CO₂, CH₄, H₂, O₂, and other gases with uncompromised safety and accuracy.

51 Series

The VA-5000 Total Siloxane Analyzer delivers high-sensitivity, continuous monitoring of siloxane in gas streams, with optional simultaneous measurement of methane (CH₄) and carbon dioxide (CO₂). Customizable to the type of cyclic siloxane being tested, this analyzer is ideal for durability testing, biogas fuel quality control, and preventing siloxane-related wear in gas engines.

VA-5000-Siloxane

The FQ Series delivers high-precision fuel flow measurement using both delta-pressure (DP) and Coriolis mass flow techniques. Designed to accommodate a wide variety of fuels—from diesel and gasoline to ethanol and e-fuels—these systems support dynamic and steady-state testing across vehicle platforms, ranging from small engines up to 5000 kW.

Model		GA-370
Gases measured		CO, CO2, CH4
Bulk gases		N2, O2, He, Ar, H2, Air
Number of measurement components		1 component or 2 components (specify a measuring balance gas)
Measuring principle		Cross-flow modulation non-dispersive infrared (NDIR) absorption method
Measurement ranges		0 to 1/2/5/10 ppm
Lowest detection limit (2σ)		10 ppb
Repeatability		≤ ± 2% of full scale
Indication error		≤ ± 2% of full scale
Zero Drift		≤ ± 0.02 ppm/day, ≤ ± 0.03 ppm/week
Span Drift		≤ ± 2% of full scale/day, ≤ ± 2% of full scale/week
Response time (T90)		≤ 180s
Gas flow rate		Sample gas : approx. 3.5L/min, reference gas : approx. 3.5L/min, span gas: approx. 3.5L/min Note: A delivery pressure of 50-100kPa is recommended for both sample and reference gas.
Analog output		Max. 2 channels isolated output (2 components) Select one from 0 to 1V, 0 to 10V, 0 to 16mA, 4 to 20mA or 0 to 20mA. Current output : Allowable load resistance 750Ω or less
Installation conditions	Ambient temperature	0 to 40°C
	Ambient relative humidity	≤85%
	Dust	Less than environmental standard
	Vibration	≤ 0.29m/s², at ≤ 100Hz
External dimensions, weight		430(W) x 221(H) x 555(D) mm (excluding protrusions), approx. 18kg
Power supply		100 to 240V AC, ≤ ± 10% (max. voltage: 250V AC)
Power consumption		Approx. 100VA

GA-370

GA-370

Why Choose GA-370

Key Advantages of GA-370

High Sensitivity

Wide Gas Compatibility

Stable Zero Drift

User‑Friendly Interface

Applications of GA-370

Air Separation Plant PPU Monitoring

Semiconductor Gas Purity Assurance

Medical Gas Cylinder QC

Hydrogen Fuel Cell Check

Reference Gas Generation Labs

Coal & Fuel Trace Gas Monitoring

Technical Specifications of GA-370

Related Products

IT-270

ENDA-5000 Series

APMA-370

APOA-370

GA-370

PLGA-1000

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