GAS SENSOR MODULES

GSB-01

Three-Gas Industrial Monitoring Module

Simultaneous CH₄, NH₃, and H₂S monitoring with Modbus RTU or Power Line Communications — no new wiring required. CH₄ sensor is ATEX and IECEx certified for Zone 1/2 hazardous areas.

ARG SENSOR MODULES

Three critical gases. One compact module.

The GSB-01 combines NDIR methane sensing with solid polymer electrochemical detection of ammonia and hydrogen sulfide on a single board. Selectable Modbus RTU or Power Line Communications means it drops into existing infrastructure with no new wiring.

3

Gas channels (CH₄, NH₃, H₂S)

500 ppm

H₂S range (1 ppm resolution)

100%

Vol. CH₄ NDIR range

2 comms

Modbus RTU or Power Line

SENSOR TECHNOLOGY

Industrial-grade sensors. Production-ready board.

Each gas channel uses best-in-class Amphenol SGX sensing elements. The GSB-01 is a fully assembled, calibrated module — customize the sensor complement for other gas targets.

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Methane (CH₄) — NDIR

Amphenol INIR2-ME100-PC. Non-dispersive infrared, 0–100% vol. CH₄, 10 ppm resolution. ATEX and IECEx certified for use in hazardous areas.

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Ammonia (NH₃) — Electrochemical

Amphenol PS1-NH3-100 solid polymer electrolyte sensor. 0–100 ppm range, 20 ±10 nA/ppm sensitivity. HVAC plant rooms, agricultural, and industrial hygiene applications.

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Hydrogen Sulfide (H₂S) — Electrochemical

Amphenol PS1-H2S-500. 0–500 ppm (1000 ppm overload), LDL ≤2 ppm, 1 ppm resolution. T‑90 <30 sec. Sewage, utilities, and confined space monitoring.

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Modbus RTU or Power Line Comms

Selectable RS-485 Modbus RTU or Power Line Communications — data over existing AC wiring with zero new cable runs. 4-position screw terminal. Uses the ARG G3-PLC Module for mesh PLC networking.

SPECIFICATIONS

Technical Specifications

Parameter	Methane (CH₄)	Ammonia (NH₃)	Hydrogen Sulfide (H₂S)
Sensor	INIR2-ME100-PC	PS1-NH3-100	PS1-H2S-500
Technology	NDIR infrared	Solid polymer electrochemical	Solid polymer electrochemical
Measurement Range	0–100% vol. CH₄	0–100 ppm	0–500 ppm
Resolution	10 ppm	—	1 ppm
Sensitivity	—	20 ±10 nA/ppm	90 ±20 nA/ppm
Max Overload	—	—	1000 ppm
LDL / Detectivity	100 ppm	—	≤2 ppm
T‑90 Response	~19 sec	—	<30 sec
Operating Temp	‑20°C to +50°C	‑20°C to +50°C	‑40°C to +50°C
Sensor Output	Analog + UART	Electrochemical (current)	Electrochemical (current)
Certifications	ATEX, IECEx	—	RoHS

Module Specifications
Communications	Modbus RTU (RS-485) or Power Line Communications — field selectable
Connector	4-position screw terminal
Gas Channels	3 (CH₄, NH₃, H₂S) — customizable for other gas targets
Model	GSB-01 (Model 01 — production-ready configuration)

APPLICATIONS

From safety compliance to process control.

The GSB-01 covers the three most common industrial gas hazards in one drop-in module — deployable over existing wiring infrastructure.

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Safety & Leak Detection

Continuous monitoring for explosive, toxic, and asphyxiant gas hazards. Natural gas leak detection, sewage H₂S, confined space entry monitoring, OSHA PEL/IDLH compliance logging.

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HVAC & Building Automation

Air quality and safety monitoring integrated directly into building systems. Parking garage detection, mechanical room safety, BMS integration via Modbus, demand-controlled ventilation.

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Industrial Process Monitoring

Continuous gas monitoring in process environments and utilities. Chemical and pharmaceutical plants, agriculture and cold storage (NH₃), water treatment (H₂S).

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Agriculture & Food Processing

Monitor ammonia in livestock facilities, cold storage, and food processing environments. Configurable thresholds and cloud alerts for remote monitoring.

RESOURCES

Product Documentation

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Product Brief

Coming soon

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Integration Guide