Product Description:
YJJ MP905 Semiconductor VOC / Air Quality Sensor Household Appliances and IoT Devices
Features:
I. Core Parameters (Official Winsen)
Model: MP905
Type: Planar Semiconductor Gas Sensor (MOx)
Package: Metal Cap Package (4 pins)
Detected Gases: Formaldehyde, Benzene, Alcohol, Smoke, Lighter Gas, Paint Volatile Organic Compounds (Broad-spectrum VOC)
Detection Range: 0.5 - 1000 ppm (Alcohol)
Sensitivity: Highly sensitive to low-concentration VOCs / Formaldehyde / Benzene compounds
Electrical Parameters
Loop Voltage VC: 5.0 V ± 0.1 V DC
Heating Voltage VH: 5.0 V ± 0.1 V DC
Heating Resistor RH: 95 Ω ± 10 Ω (Room Temperature)
Heating Power Consumption PH: ≤ 300 mW
Load Resistor RL: Adjustable externally
Performance Indicators
Response Time T90: ≤ 20 s
Recovery Time: ≤ 60 s
Operating Temperature: 0 - 50℃
Operating Humidity: ≤ 95% RH (No Condensation)
Life Span: ≥ 5 Years (Typical)
II. Working Principle
The ceramic substrate (Al₂O₃) integrates a heater + metal oxide gas-sensitive layer.
When encountering reducing gases (VOC, Formaldehyde, Benzene, Smoke), the electrical conductivity increases with the concentration.
An external simple circuit can convert the resistance change into a voltage signal to reflect the gas concentration.
III. Main Applications (Very Common)
Indoor Air Quality (IAQ) Monitoring
Air Purifiers, Fresh Air Systems, Smart Air Conditioners (Automatic Speed Control / Start/Stop)
Bedrooms, Baby Rooms, Offices: Warning for Formaldehyde, Benzene, TVOC, Smoke
Kitchen / Bathroom Smart Control
Smoke Detection with: Automatic start when VOC / Formaldehyde exceeds the limit
Bathroom: Monitoring of (VOC), Automatic Exhaust Ventilation
Smart Home and IoT
Home Air Quality Detectors, Portable Pens, IoT Nodes
Simple Screening of Formaldehyde / Benzene Pollution in Newly Built Houses
Industrial and Commercial
Small Workshops, Warehouses: Painting, Printing, Solvent Volatilization Monitoring
Shopping Malls, Conference Rooms: Monitoring of and Harmful Gases
Specifications:
| Sensitive extreme voltage VC |
5.0V ± 0.1V DC |
| Resistance RH |
95Ω ± 10Ω |
| Heating power consumption PH |
≤ 300mW |
| Load resistance RL |
Adjustable externally |
| size |
10.1 x 10.1 x 6.5 mm3 |
| T90 Response Time |
≤ 30s |
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Italian
