Winsen MQ-4 Methane Sensor is an original and brand new methane gas sensor. With a long lifespan and low price, for detecting Methane gas leakage.

The sensitive material of the MQ-4 gas sensor is SnO2, which with lower conductivity in clean air. When the target flammable 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-4 gas sensor has a high sensitivity to methane, also has anti-interference to alcohol and other gases. It is low cost and suitable for different applications of detecting kinds of methane concentration gases.

Features:

1. Responsive to Methane gases
2. Compatible with 5V
3. Cost-efficient

Package Includes:

1 x Winsen MQ-4 Methane Sensor

DFRobot released its latest wide-range Arduino infrared CO2 sensor, which effective range is up to 0~50000ppm. This sensor is based on non-dispersive infrared NDIR technology and has good selectivity and oxygen-free dependency. It integrates temperature compensation and supports UART communication mode. Most importantly, the product is easy to use; it is compatible with all types of microcontrollers with UART ports, like Arduino, Raspberry Pi, and other microcontrollers. Besides, it has a long service life, up to 5 years!
In addition, this UART Infrared CO2 Sensor is a high-performance sensor that combines the technology of mature infrared absorption gas detection with precision optical circuit design as well as sophisticated circuit design. It has characteristics such as wide range detection, high sensitivity, high resolution, low power consumption, fast response, anti-water vapor interference, no poisoning, high stability and long life.

Features:

1. High sensitivity High resolution
2. Low power consumption
3. Excellent stability
4. Temperature compensation
5. Excellent linear output
6. High cycle life
7. Anti-water vapor interference
8. No poisoning
9. Need 5V power supply, even you are using a 3.3V microcontroller, like Genuine 101/ Raspberry Pi .etc.

Package Includes:

1 x DFRobot Gravity UART Infrared CO2 Sensor (0-50000ppm)

Are you searching for a temperature sensor having high accuracy? Then, the Grove Temperature Sensor v1.2 is perfect for you. It uses a thermistor as a form of resistance value to alter the Vcc. The resistance of a thermistor will increase when the ambient temperature decreases. Its this characteristic that we use to calculate the ambient temperature. Depending on the temperature measured, it supplies an analog signal from 0 to 5 Vcc. The detectable range of this sensor is -40 to 125C and the accuracy is 1.5C.

For all Grove users (especially beginners), Seeed Studio provides guidance PDF documents. Please download and read through Preface Getting Started and Introduction to Grove before using the product. This is a suitable product for not only Grove users but also all electronic enthusiasts. So, why wait? Buy now

Features:

1. High Accuracy
2. Thermistor: NCP18WF104F03RC (NTC)
3. Grove compatible interface
4. Easy to use

Package Includes:

1 x Seeed Studio Grove – Air Quality Sensor(BME688) with built-in AI, High-Performance 4-in-1, Gas, Humidity, Pressure and Temperature sensor

Figaro’s TGS5042 is a battery-operable electrochemical sensor which offers several advantages over traditional electrochemical sensors. Its electrolyte is environmentally friendly, it poses no risk of electrolyte leakage, can detect concentrations as high as 1% CO, operates in a range from -5˚ and +55˚C, and it has lower sensitivity to interferant gases. With long life, good long-term stability, and high accuracy, this
sensor is the ideal choice for CO detectors with digital displays. OEM customers will find individual sensor data printed on each sensor in barcode from, enabling users to skip the costly gas calibration process and allowing for individual sensor tracking. TGS5042 utilizes a standard AA battery-sized package.

Note: for more technical details go through Datasheet in the attachment section

Applications:

1. * Residential and commercial CO detectors
2. CO monitors for industrial applications
3.  Ventilation control for indoor parking garages
4.  Fire detection

Package Includes:

1 x Figaro TGS5042-A00 Carbon Monoxide Sensor Industrial safety

Figaro’s TGS5141 is a battery-operable electrochemical sensor that uses a unique electrolyte that eliminates the need for a water reservoir. By eliminating the water reservoir used in TGS5042, the comparative size of TGS5141 is reduced to just 10% of TGS5042. With its ultra-compact size, this sensor is the ideal choice for size-oriented applications such as portable CO detectors, small residential CO detectors, and multi-sensor fire detectors. OEM customers will find individual sensor data printed on each sensor in barcode form, enabling users to skip the costly gas calibration process and allowing for individual sensor tracking.

Note: For more technical  details go through Datasheet in the attachment section 

Applications:

Residential and commercial CO detectors
Fire detection

Features:

1. Ultra-compact
2. Battery operable
3. High repeatability/selectivity to CO
4. Linear relationship between CO gas
5. concentration and sensor output

Package Includes:

1 x Figaro TGS5141-P00 Carbon Monoxide Sensor home air quality monitor

The sensing element comprises a metal oxide semiconductor layer formed on the alumina substrate of a sensing chip together with an integrated heater. In the presence of detectable gas, sensor conductivity increases depending on gas concentration in the air. A simple electrical circuit can convert the change in conductivity to an output signal which corresponds to the gas concentration. The TGS2602 has high sensitivity to low concentrations of odorous gases such as ammonia and H2S generated from waste materials in office and home
environments. The sensor also has a high sensitivity to low concentrations of VOCs such as toluene emitted from wood finishing and construction products.

Note: For more technical details go through Datasheet in the attachment section 

Features:

1. High sensitivity to VOCs and odorous gases
2. Low power consumption
3.  High sensitivity to gaseous air contaminants
4. Long life
5.  It uses a simple electrical circuit
6.  Small size

Package Includes:

1 x Figaro TGS2602 Air Quality / VOC Sensor