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MQ-8 Hydrogen H2 Gas Sensor A Must-Have for Gas Monitoring Systems

Categories Gas Sensor
Model Number: MQ-8
Place of Origin: CN
MOQ: 1
Payment Terms: L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability: 5000pcs
Delivery Time: 3-5work days
Packaging Details: Paper box
Price: Negotiable
Model: MQ-8
Sensor Type: Semiconductor
Standard Encapsulation: Bakelite, Metal cap
Target Gas: Hydrogen
Detection range: 100~1000ppm(H2 gas)
Heater Voltage: 5.0V±0.1V AC or DC
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MQ-8 Hydrogen H2 Gas Sensor A Must-Have for Gas Monitoring Systems


MQ-8 Hydrogen H2 Gas Sensor


Profile :

Sensitive material of MQ-8 gas sensor is SnO2,which with lower conductivity in clean air. When hydrogen gas exists, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit. MQ-8 gas sensor has high sensitivity to hydrogen gas, also has anti-interference to other gases. This sensor can detect hydrogen, especially city gas. It is a kind of low-cost sensor for kinds of applications.


Features :

It has good sensitivity to hydrogen gas in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.


Main Applications :

It is widely used in domestic gas leakage alarm, industrial flammable gas alarm and portable gas detector.


Category

Parameter

Symbol

Specification

Remarks

Basic InformationModel-MQ-8-
Sensor Type-Semiconductor-
Standard Encapsulation-Bakelite, Metal cap-
Target Gas-Hydrogen (H₂)-
Detection Range-100~1000 ppm (H₂ gas)-
Standard Circuit ConditionsLoop VoltageVc≤24V DC-
Heater VoltageVH5.0V±0.1V AC or DC-
Load ResistanceRLAdjustable-
Sensor Character (Standard Test Conditions)Heater ResistanceRH30Ω±3ΩMeasured at room temperature
Heater ConsumptionPH≤950mW-
SensitivitySRs(in air)/Rs(in 1000ppm H₂) ≥ 5Rs = Sensor resistance
Output VoltageVs2.5V~4.0VMeasured in 1000ppm H₂
Concentration Slopeα≤0.6 (R1000ppm/R400ppm H₂)R = Sensor resistance at specified concentration
Standard Test ConditionsTemperature & Humidity-20℃±2℃;55%±5%RH-
Test Circuit Voltage-Vc: 5.0V±0.1V;VH: 5.0V±0.1V-
Preheat Time-Over 48 hoursRequired for stable performance
Environmental RequirementOxygen Content-21% (not less than 18%)Affects initial value, sensitivity and repeatability
Product LifeLife Span-10 yearsUnder normal operating conditions


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