SPECIFICATIONS

Accessory Type: SENSOR

Battery Included: no

Brand Name: Estardyn

Choice: yes

Compatible With: 1

High-concerned chemical: none

Origin: Mainland China

Typical Application Fields: Education and Learning

MQ-2 Sensor

• Model: MQ-2

• Gas: smoke

• Detection range: 300 to 10000ppmm

• Characteristic gas: 1000ppmm isobutane

• Sensitivity: R in air/Rin typical gasge5

• Sensitive body resistance: 1KOmega to 20KOmega in 50ppm toluene

• Response time: le10s

• Recovery time: le30s

• Heating resistance: 31 Omega plusmn 3 Omega

• Heating current: le180mA

• Heating voltage: 5.0V plusmn 0.2V

• Heating power: le900mW

• Measuring voltage: le24V

• Working conditions Ambient temperature: -20 deg C ~ +55 deg C

• Humidity: le95% RH

• Environmental oxygen content: 21%

• Storage conditions Temperature: -20 deg C ~ +70 deg C

• Humidity: le70%RH

• Applications: Household and factory gas leak monitoring devices suitable for detection of liquefied gases, butane, propane, methane, alcohol, hydrogen, fumes, etc.

• Product model: MQ-7

• Product type : Semiconductor gas sensor

• Detection gas: carbon monoxide

• Detection concentration: 10-1000ppmCO

• Loop voltage: le10V DC

• Heating voltage (VH): 5.0V plusmn 0.2V ACorDC (high)

• 1.5V plusmn 0.1VACorDC (low)

• Heating time (TL): 60plusmn1S (high) 90plusmn1S (low)

• Load resistance (RL): adjustable

• Heating resistance (RH): 31Omega plusmn 3Omega (room temperature)

• Heating power consumption (PH): le350mW

• Sensitive surface resistance (Rs): 2KOmega-20KOmega (in100ppmCO)

• Sensitivity (S); Rs (in air) / Rs (100ppmCO) ge 5

• Concentration slope (alpha): le 0.6 (R300ppm/R100ppmCO)

• Temperature, humidity: 20 deg C plusmn 2 deg C; 65% plusmn 5% RH

• Standard test circuit: Vc: 5.0V plusmn 0.1V; VH (high): 5.0V plusmn 0.1V; VH (low): 1.5V plusmn 0.1V

• Warm-up time: no less than 48 hours