YJJ MQ-D1 Semiconductor Gas Sensing Sensor for Household Gas Leakage Detection

Product Description:

YJJ MQ-D1 Semiconductor Gas Sensing Sensor for Household Gas Leakage Detection

Features:

MQ-D1 semiconductor combustible gas gas sensor belongs to the MQ-D series of low-power models. It can detect various types of combustible gases and smoke. It has low cost and a simple circuit, and is mainly used for detecting gas leaks in household environments.

I. Basic Overview

Model: MQ-D1

Sensing Principle: Metal Oxide Semiconductor (MOS) gas sensor, resistance decreases as the concentration of combustible gas increases, and outputs an analog voltage signal

Packaging: Metal case TO packaging, 4 pins (heating wire pin 2 + signal electrode pin 2)

Core Positioning: Low-power wide-spectrum combustible gas detection, compared with traditional MQ-2 and MQ-4, with lower power consumption and smaller size

II. Detected Gas and Range

1. Detectable gases (broad-spectrum type)

Natural gas (methane CH₄), gas, liquefied petroleum gas (LPG), hydrogen, carbon monoxide (CO), acetylene, gasoline / kerosene vapor, alkanes, smoke, organic combustible vapor

2. Measurement range

500 ppm ~ 10000 ppm (0.05% ~ 1%), optimal sensitivity for methane

Calibration standard: 0.3% (3000 ppm) methane

III. Complete Electrical Parameters (Original Factory Specification Sheet)

1. Power Supply and Heating Parameters

Heating voltage VH: 6.0V DC

Loop working voltage Vc: ≤ 24V DC

Standard load resistance RL = 51Ω

Heating power consumption: Low-power design, much lower than ordinary MQ series sensors

2. Gas Sensor Electrical Characteristics

Clean air output voltage: V₀ = 0.7 ~ 1.6 V

Calibrated gas (0.3% methane) output voltage: V₁ ≥ 2.5 V

Response time (T₉₀): ≤ 30 s (gas reaches stable output)

Recovery time: ≤ 60 s (leaving gas and returning to baseline)

3. Working Environment

Operating temperature: -10℃ ～ +45℃

Storage temperature: -20℃ ～ +50℃

Environmental humidity: ≤ 90% RH (no condensation)

Atmospheric pressure: 650 ~ 800 mmHg

Long-term stability: 24-hour continuous working cycle, baseline voltage drift **±15% within**

4. Pin Definition (4-pin universal)

1, 2 pins: Heating wire (VH) (no polarity)

3, 4 pins: Signal terminals (Vc/RL) (at both ends of the gas sensor)

IV. Core Features of the Product

Low power consumption: Exclusive low-power heating design for D series, suitable for battery-powered and portable devices

High sensitivity: Good response to methane, liquefied gas, gas, smoke, and organic combustible vapor

Excellent long-term stability, long lifespan, and good resistance to environmental interference

Simple peripheral circuit, only requires heating power supply + voltage divider sampling, single-chip ADC directly reads

Low cost, suitable for mass production of large-scale household appliances

Preheating required (initial power-on preheating ≥ 5 minutes for stable measurement)

V. Main Applications and Application Scenarios

1. Core Application

Household gas leakage alarm (natural gas, liquefied gas, urban gas leak detection)

2. Expansion in all scenarios

Home security: Kitchen gas leakage detection, gas leak monitoring for gas water heaters / wall-mounted furnaces

Industrial and civilian: Small-scale combustible gas leakage inspection, pipeline gas leak detection

Environmental monitoring: Indoor combustible gas, smoke, and combustible vapor over-limit detection

Small appliance integration: Gas stove safety protection, gas safety module for drying / heating equipment

Simple equipment: Portable gas detector, garage / basement combustible gas monitoring, simple smoke alarm

Specifications: