30pcs MQ-4B Sensor Gas Sensor CO CO2 Smoke Methane Sensor Detecting MQ Sensor DIY for Safety Detection System
$60.39
Shipping:Standard Shipping about 10-25 business days
Secure Payment:Paypal,VISA,MasterCard
Size Conversion
Inches
Centimeters
Please according to your own measurements to choose your suitable size. The tags inside the items will show in our Asian (Type) size.
Overview
– The gas sensing material used in the MQ-4B methane sensor is tin dioxide (SnO2) with lower conductivity in clean . When there is a flammable gas in the environment where the sensor is located, the conductivity of the sensor increases as the concentration of flammable gas in the increases. The change in conductivity can be converted to an output signal corresponding to the gas concentration using a simple circuit.
– The MQ-4B methane sensor has high sensitivity to methane and strong anti-interference ability to alcohol and other disturbing gases.
Characteristics
This product has good sensitivity to methane in a wide concentration , and has the advantages of long life, low cost, and simple driving circuit.
Application
Widely used in household gas leak alarms, industrial combustible gas alarms and portable gas detectors
Basic Circuit
The figure above shows the basic test circuit for the MQ-4B sensor. The sensor requires two voltages to be applied:voltage (VH) and test voltage (VC). The VH is used to provide a specific operating temperature for the sensor, either DC or AC. The VRL is the voltage across the load resistor (RL) of the sensor in series. VC is the voltage for testing the load resistor RL and requires a DC power supply.
Package Included
30 x MQ-4B Sensor Gas Sensor CO CO2 Smoke Methane Sensor
Weight | 0.06 kg |
---|
Customers Also Viewed
Cross-Section of Geometric Solids Exploring Geometry Manipulatives Mathematics Game Toys
$16.19MathematicsAdd to cartSpecificationMaterial:PlasticColor:Random ColorWeight:90gCube:(L*W*H) approx 4*4*4cm/ 1.57*1.57*1.57 inchCylinder A:(Dia*H) approx 3*3*6cm/ 1.18*1.18*2.36 inchCone:(Dia*H) approx 3*3*5cm/ 1.18*1.18*1.96 inchSphere:(Dia) approx 3cm/ 1.18 inchFeatures1.Shapes including cubes, cylinders, pyramid, sphere, cone, and various Cross-sections model.2.Cross-section of Geometric Solids Experiment set, kids math geometry manipulatives.3.Explore shape, size, pattern, volume and measurement with these invaluable hands-on tools.4.Opened and clear plastic geometric solids, easily …
Cross-Section of Geometric Solids Exploring Geometry Manipulatives Mathematics Game ToysRead More
2Pcs 20W 16V 1.25A Monocrystalline Silicon Rear Junction Box Solar Panel + 4 x Spring + Cables
$107.51Smart Robot & Solar PanelAdd to cartFeatures– The two pieces of the product are connected in parallel. Spring connection, support multiple pieces of DIY parallel connection. Mounting holes are provided on each solar panel.– Suitable for 12V batteries. Support 12V output, suitable for 12V battery charging.– High efficiency, conversion rate of 19-20%– Flexible, suitable for surface mountingSpecificationsType:Flexible solar panelMaterial:Monocrystalline siliconExpand:420*385*2.5mmFolding:420x190x2.5mmWorking temperature:-40° …
3pcs D1 Mini Lite V1.0.0 WIFI internet of Things Development Board Based ESP8285 1MB FLASH
$23.13Smart ModuleAdd to cartFeatures11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire supported(except D0)1 analog input(3.2V max input)a Micro USB connectionCompatible with 1MB Flash500mA resettable fusePackage included3 x WEMOS D1 mini Lite3 x 2pcs Normal pin
3pcs 315MHZ Wireless Transmitter Receiving Module ASK DC 9V-12V EV1527 Remote Control Switch Board
$11.69Smart ModuleAdd to cartTechnical requestProduct model:ZF-2 (with code)Transmission frequency:315MHZWorking voltage:DC 9V ~12VModulation method:ASKQuiescent current:0uAWorking current:8~10mACoding type:learning code (EV1527)Radiated power:10~15mWShooting distance:100-200 meters (receiver sensitivity -108dBm)Volume:26.3mm*23.3mm*9mmPIN:NAME:Function1:ANT:RF signal input pin, this pin needs to be connected to the antenna2:12V-:DC power supply negative input pin3:12V+:DC power supply positive input pinRated parameter:Symbol:ValueDC power supply:VDD-VSS:9V-12VStorage temperature range (TS):TSTG:-12°C to 75°CWelding temperature:+260°CPackage includes3 x Receiving …
5Pcs Geekcreit ESP8266 ESP-01 ESP-01S WS2812 RGB LED Lamp Module Support for IDE Programming
$11.37Expansion Board & ShieldAdd to cartFeatureThis is a WS2812 RGB LED control module based on ESP-01 / 01S. With it, you can easily control the WS2812 light bar / light ring. DIY own lighting control system. Support for Ard uino IDE programming.Characteristic* Master:ESP-01 / ESP-01S (This module does not include ESP-01 / ESP-01S)* Control Pin:GPIO2* Interface:3Pin PH2.0 connector* Operating Voltage:DC …
DD30CRTA 3A 12V 1-1000AH Lead-Acid Battery Accumulator Storage Cell Charger Charging for UPS Car Solar Motorcycles Electric Vehicles
$15.30Power Supply ModuleAdd to cartSpecificationsPower supply voltage:15-28VDC(Recommended 16-25VDC)Over Charge Voltage is 14.8VFloat Charge Voltage is 13.55VMaximum charge current:3AQuiescent current:about 1.8mAHigh PWM Switching Frequency:300KHzOperating Ambient Temperature:-40→ to +85→Size:66 x 20x 12mmWeight:9gApplicationsCar battery chargingSolar battery chargingMobile LoadspeakerLead-Acid Battery ChargerElectric Bicycle ChargerUPS Portable Industrial and Medical EquipmentStandalone Battery ChargersFeaturesFixed Over-Charge VoltageOvercurrent protectionAutomatic Conditioning of Deeply Discharged BatteriesAutomatic RechargeCharger Status IndicationBattery Overvoltage ProtectionSuitable …
Reviews
There are no reviews yet.