Gas Sensors

Part Number	Description / PDF	Quantity
EXPLORIR-M-E-100 Gas Sensing Solutions Ltd	CO2 SENSOR 100% COMPACT -25C TO	15
SGAS701 Renesas Electronics America	TRACE HYDROGEN SENSOR	388
968-028 Spec Sensors	SENSOR CO ANALOG VOLTAGE MOD	0
T6613-F Thermometrics (Amphenol Advanced Sensors)	CO2 MODULE 2000PPM FLOW THROUGH	2
INIR-CD5% Amphenol	INTEGRATED INFRARED CO2 GAS SENS	14
INS2-CO-01 Woodhead - Molex	PORTABLE CARBON MONOXIDE DETECTO	1
NGM-1 Amphenol	LOW POWER NATURAL GAS MODULE	87
VQ21TSB Amphenol	POISON RESISTANT 2V FLAMMABLE GA	44
USEQGCQAAN1100 KEMET	GAS DETECTOR, ANALOG TO-39, GAS	5
T5545 Comet America	WEBSENSOR - REMOTE CO2 ,DUCT	20
114991732 Seeed	SENSECAP LORAWAN CO2 SENSOR - US	17
MICS-VZ-89TE Amphenol	VOC SENSOR IAQ MODULE W/ADDITION	96
110-402 Spec Sensors	SENSOR GAS OZONE ANALOG CUR MOD	0
SFA30-D-T Sensirion	FORMALDEHYDE SENSOR MODULE	0
IR12EM Amphenol	16MM, HYDROCARBON INFRARED GAS S	24
968-036 Spec Sensors	DGS-H2S DIGITAL GAS SENSOR MODUL	46
110-601 Spec Sensors	SENS GAS SULF DIOX ANALG CUR MOD	124
VQ631M/1 Amphenol	VQ31 PELLISTOR VQ600 HEAD, METRI	21
USEQGCDAC82L00 KEMET	GAS DETECTOR, ANALOG TO-39, GAS,	14
INS2-H2S-02 Woodhead - Molex	PORTABLE HYDROGEN SULFIDE DETECT	5

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