Keyestudio MQ-135 SnO2 Benzene Sulfide Air Quality Sensor module

• Product model: MQ135

• Product type: Semiconductor gas sensor

• Standard Package: Bakelite (Black Bakelite)

• Target gas: Ammonia; methylbenzene; hydrogen

• Standard circuit: Loop voltage Vc ≤24V DC

• Heater voltage: VH 5.0V±0.2V AC or DC

• Load resistance: Adjustable RL

• Features of sensitive components under standard test condition: Heating resistor RH 31Ω±3Ω (room temperature)

• Heater power consumption: PH ≤900mW

• Surface resistance of sensitive material: Rs 2KΩ-20KΩ(in 100ppm NH3)

• Sensitivity: S Rs(in air)/Rs(100ppmNH3)≥5

• Concentration slope: α ≤0.6(R100ppm/R50ppm NH3)

• Standard testing temperature/humidity : 20±2/65%±5%RH

• Standard testing circuit: Vc:5.0V±0.1V

• VH: 5.0V±0.1V

• Preheating time: >=48H

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