PG-300 series

Portable Gas Analyzer

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

Portable Gas Analyzer

Why Choose PG-300 series

Exceptional Portability – Compact, ~20% lighter design with impact-resistant side guards for easy, durable field deployment.
Reliable Measurement Technology – Employs cross-flow modulation CLD and NDIR for stable, interference-resistant readings.
Fast Operation & Connectivity – Ready to measure within 30 minutes, includes timer scheduling, Ethernet/LAN, and SD data recording.
Broad Gas Coverage – Flexible gas configuration models covering greenhouse gases, stack emissions, process streams, and more.

Key Advantages of PG-300 series

Built for Field Mobility

20% Lighter & Rugged

Compact, reinforced design makes it ideal for transport and use in harsh field environments.

Lab-Level Accuracy On-Site

Cross-Flow Modulation

Offers drift-resistant precision without optical alignment, even during extended use.

Quick Start & Connectivity-Ready

30-Minute Warm-Up + Ethernet

Fast readiness with scheduling and real-time data networking for efficient workflows.

Multi-Gas Flexibility

Customizable Configurations

Supports various gas combinations to suit applications from GHG research to industrial emissions monitoring.

Technical Specifications of PG-300 series

NOx	SO₂	CO	CO₂	O₂	CH₄	N₂O
Standard models	PG-320			●	●
	PG-325	●				●
	PG-330			●	●	●
	PG-335	●		●		●
	PG-337	●	●			●
	PG-340	●		●	●	●
	PG-350	●	●	●	●	●
CH₄ models	PG-324				●		●
	PG-344			●	●	●	●
	PG-344 (Carbon Neutral)				●	●	●	●

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Analysis Principle
NOx	Cross-Modulation Chemiluminescence Detection Method
SO₂,CO, CH₄	Cross-Modulation Non-Dispersive Infrared Absorption Method
O₂	Galvanic, Zirconia or Paramagnetic Method

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Ranges (Standard models)
NOx	0-25/50/100/250/500/1000/2500 ppm
N₂O	C range: 0-100/200/500/1000 ppm D range: 0-500/1000/2000/5000 ppm
SO₂	0-200/500/1000/3000 ppm
CO	0-200/500/1000/2000/5000 ppm
CO₂	0-10/20/30 vol%
O₂	0-5/10/25 vol% * *For paramagnetic method, please contact HORIBA representative in your area for the details

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Ranges (CH₄ models)
CH₄	0-2000/5000ppm
CO	0-2000/5000ppm
CO₂	0-5/10/20vol%
O₂	0-5/10/25vol%* *For paramagnetic method, please contact HORIBA representative in your area for the details

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Ranges (PG-344 Carbon Neutral)
CH₄	C range: 0-200/500/1000/2000 ppm D range: 0-500/1000/2000/5000 ppm
N₂O	C range: 0-100/200/500/1000 ppm D range: 0-500/1000/2000/5000 ppm
CO₂	0-5/10/20 vol%
O₂	0-5/10/25 vol% （Zirconia Method, or Galvanic Method） 0-10/25 vol% (Paramagnetic Method (Dumbbell type))

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	Standard Model	CH₄Model
Repeatability	±0.5% of full scale (NOx:≧100ppm range / CO: ≧1000ppm range) ±1.0% of full scale (Except above)	±1.0% of full scale
Linearity	±2.0% of full scale
Drift	±1.0% of full scale / day (For SO₂ analyzer only: ±2.0% of full scale / day)
Response Time (Td+T₉₀)	Analyzers except SO₂ analyzer: 45 sec. or less (From sample inlet) SO₂ analyzer: 180 sec. or less (From sample inlet)
Sample Gas Flow Rate	Approx. 0.5L/min.
Display	Measurement (3 or 4 digit display), range flow rate, etc.
Output	DC 4-20 mA (non-insulated) or 0-1 V (non-insulated) [optional] / Ethernet
Warm-up Time	30 min. ±2.0% of full scale / 2 hours
Data Saving	SD^TM memory card / SDHC^TM memory card
Ambient Temperature	0°C-40°C <32°F-104°F>
Ambient Humidity	Maximum 80% R.H. For temperature up to 31°C decreasing linearly to 50% at 40°C Upper limit of N₂O concentration: Less than 1 ppm, Upper limit of CH₄ concentration: Less than 2 ppm Please exhaust sampling gas sufficiently far from the equipment to avoid increase the concentration of N₂O and CH₄ in the operating environment.
Power	AC 100V to 240V ±10% (maximum 250 V), 50/60 Hz
Power Consumption	Approx. 160VA in a steady state, maximum 220VA
Dimentions	(With side guards) 300(W) x 520(D) x 260(H) mm <11.8"(W) x 20.5"(D) x 10.2"(H)> (Without side guards) 260(W) x 520(D) x 260(H) mm <10.2"(W) x 20.5"(D) x 10.2"(H)
Weight	Approx. 13kg - 15kg <29lb ～ 33lb>
Environmental rating	IP42 (Optionally available)
Sample Gas Condition	Temperature: Ambient temperature Moisture: Below the ambient temperature saturation Dust: 0.1g/Nm³ or less Pressure: ±0.98 kPa Non-existence of any gas that reacts with corrosive gas or measured gas

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・SD is a trade mark for SD-3C, LLC.
・TAKE GREAT CARE WHEN HANDLING SAMPLE GASES CONTAINING TOXIC OR FLAMMABLE GASES. TAKE MEASURES SUCH AS PROVIDING ADEQUATE VENTILATION, INSTALLING GAS DETECTORS, AND REMOVING IGNITION SOURCES IN THE WORKING AREA.
・THE PG-300 SERIES IS NOT EXPLOSION-PROOF. DO NOT USE THIS PRODUCT IN A HAZARDOUS LOCATION OR FOR MEASUREMENT OF SAMPLE GASES IN EXPLOSIVE ATMOSPHERES (MIXTURE OF A COMBUSTIBLE GAS AND AIR WITHIN THE FLAMMABILITY LIMITS). HORIBA, LTD. AND ITS AFFILIATES ARE NOT LIABLE FOR EMERGENCIES CAUSED BY LEAKAGE OR MISHANDLING OF SUCH GASES.