Gas Sensors

Part Number	Description / PDF	Quantity
968-003 Spec Sensors	SENSOR HYD SULF ANALOG VLTG MOD	32
968-034 Spec Sensors	DGS-CO DIGITAL GAS SENSOR MODULE	62
110-901 Spec Sensors	SENS GAS AIR QUAL ANALG CUR MOD	141
110-202 Spec Sensors	SENSOR GAS ALCOHOL ANALG CUR MOD	101
110-407 Spec Sensors	SENSOR GAS O3 SMT	863
968-028 Spec Sensors	SENSOR CO ANALOG VOLTAGE MOD	0
110-402 Spec Sensors	SENSOR GAS OZONE ANALOG CUR MOD	0
968-036 Spec Sensors	DGS-H2S DIGITAL GAS SENSOR MODUL	46
110-601 Spec Sensors	SENS GAS SULF DIOX ANALG CUR MOD	124
110-406 Spec Sensors	SENSOR GAS O3 THRU HOLE	1160
968-038 Spec Sensors	DGS-SO2 DIGITAL GAS SENSOR MODUL	68
110-507 Spec Sensors	SENSOR GAS NO2 THRU HOLE	121
110-802 Spec Sensors	SENS GAS AIR QUAL ANALG CUR MOD	0
968-047 Spec Sensors	SENSOR NITR DIOX ANALOG VLTG MOD	46
968-043 Spec Sensors	DIGITAL GAS SENSOR NO2 MODULE	38
968-009 Spec Sensors	SENSOR AIR QUAL ANALOG VLTG MOD	10
968-006 Spec Sensors	SENSOR SULF DIOX ANALOG VLTG MOD	30
110-508 Spec Sensors	SENSOR GAS NO2 SMT	135
110-902 Spec Sensors	SENS GAS AIR QUAL ANALG CUR MOD	0
110-602 Spec Sensors	SENS GAS SULF DIOX ANALG CUR MOD	90

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