Gas Sensors

Part Number	Description / PDF	Quantity
ZMOD4490AI1V Renesas Electronics America	LGA 3.00X3.00X0.70 MM, 0.50MM PI	0
ESCO2W2A Carlo Gavazzi	SEN CO2 2000PPM 4-20MA OUT	0
IR15TT Amphenol	19MM, 0-5% CO2 AND 0-5%/100% BRO	22
EC4-1-CLO2 Amphenol	4 SERIES CHLORINE DIOXIDE GAS SE	11
VQ623/1 Amphenol	VQ23 PELLISTOR VQ600 HEAD, METRI	0
27932 Parallax, Inc.	PROPANE GAS SENSOR MODULE	0
27929 Parallax, Inc.	CARBON DIOXIDE GAS SENSOR MODULE	0
605-00007 Parallax, Inc.	CARBON MONOXIDE GAS SENSOR	0
605-00008 Parallax, Inc.	METHANE GAS SENSOR	0
IR14BD Amphenol	19MM, 0-100% LEL ACETYLENE INFRA	0
IAQ-CORE P ScioSense	MOD IAQ I2C PULSED MODE	0
KGZ10 Honeywell Sensing and Productivity Solutions	SENSOR OXYGEN 4.35V 40UA	0
KGZ10-SP Honeywell Sensing and Productivity Solutions	SENSOR OXYGEN 4.35V 40UA	0
314100010 Seeed	GAS SENSOR -MQ5	0
SGAS707 Renesas Electronics America	VOC SENSOR	0
IAQ-ENGINE/T ams	IAQ-ENGINE/T MODULE LF I2C & 0-5	0
CCS801 ams	ULTRA LOW GAS SENSOR FOR INDOOR	0
968-004 Spec Sensors	SENSOR NITR DIOX ANALOG VLTG MOD	0
605-00011 Parallax, Inc.	ALCOHOL BENZINE GAS SENSOR	0
605-00009 Parallax, Inc.	PROPANE GAS SENSOR	0

Gas Sensors

1. Overview

Gas sensors are detection devices that identify and measure gas concentrations in the environment. They convert chemical interactions with gas molecules into electrical signals for quantitative analysis. These sensors play a critical role in industrial safety, environmental monitoring, healthcare, and smart home systems by preventing gas leaks, ensuring air quality, and enabling process control.

2. Major Types and Functional Classification

Type	Functional Features	Application Examples
Electrochemical	High accuracy, stable baseline, requires oxygen	CO detectors, O2 monitors
Semiconductor	Low cost, broad detection range, temperature-dependent	Indoor air quality sensors
Catalytic Combustion	Explosive gas detection, requires periodic calibration	Industrial methane detectors
Infrared (IR)	Non-contact measurement, high selectivity	CO2 HVAC monitoring
Photoionization (PID)	VOC detection at ppm levels, UV lamp required	Environmental pollution monitoring

3. Structure and Components

A typical gas sensor consists of: - Sensing element (metal oxide/electrolyte membrane) - Signal conditioning circuit (amplifier, ADC) - Housing with gas inlet ports - Temperature/humidity compensation module - Communication interface (UART/I2C)

4. Key Technical Specifications

Parameter	Description
Detection Range	Measurable gas concentration span (ppm to %LEL)
Sensitivity	Signal change per gas concentration unit (mV/ppm)
Response Time	T90 response speed (3-300 seconds)
Accuracy	Measurement error margin ( 2-10%)
Operating Temperature	Functional range (-20 C to +50 C typical)
Long-term Stability	Drift specification (5-15% per year)

5. Application Fields

Industrial safety: Fixed gas detection systems
Environmental monitoring: Urban air quality stations
Healthcare: Medical breath analyzers
Smart homes: Combustible gas alarms
Automotive: Cabin air quality management

6. Leading Manufacturers and Products

Manufacturer	Product Series	Key Features
Honeywell	XNX Universal Transmitter	Dual-sensor redundancy
Figaro Engineering	TGS2600	Low-power VOC detection
Membrapor	Toxic Gas Sensors	Eletrochemical cells for Cl2
Senseair	K-30 CO2 Module	NDIR technology, 30ppm accuracy
AMS (Austria)	ENS160 MOX Sensor	AI-based gas discrimination

7. Selection Guidelines

Key consideration factors:

Target gas chemical properties
Environmental conditions (temperature/humidity range)
Required detection threshold and repeatability
Power consumption budget
Maintenance accessibility for calibration
Cost vs. lifetime trade-offs

Industry Trends Analysis

Emerging development trends include: - Miniaturization through MEMS technology - Multi-gas detection using AI pattern recognition - Wireless self-powered IoT sensor nodes - Enhanced selectivity via nanomaterial coatings - Reduced cross-sensitivity through hybrid sensing methods