This is a  Winsen MP-4-24V CH4 Methane Natural Combustible Gas Sensor Metal Cap.MP-4 model with advanced planar construction is comprised of heater and metal oxide semiconductor material of subminiature Al2O3 ceramic plate, fetch out electrode down-lead, encapsulation in metal base and cap. When the target gas exists, The sensor’s conductivity is higher along with the gas concentration rising. Please use a simple electro circuit, convert the change of conductivity to correspond to the output signal of gas concentration.

Features:

1. Lower consumption
2. Small size
3.  Fast response and resume
4.  Highest sensitivity
5.  Excellent stability and long life
6.  Easy circuit and big signal output
7.  Excellent selectivity

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 is comprised of a metal oxide semiconductor layer formed on an alumina substrate of a sensing chip together with an integrated heater. In the presence of a detectable gas, the sensor’s conductivity increases depending on the 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 TGS 2600 has a high sensitivity to low concentrations of gaseous air
contaminants such as hydrogen and carbon monoxide which exist in cigarette smoke. The sensor can detect hydrogen at a level of several ppm. Due to the miniaturization of the sensing chip, TGS 2600 requires a heater current of only 42mA and the device is housed in a standard TO-5 package

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

Features:

1. Low power consumption
2. High sensitivity to gaseous air contaminants
3. Long life and low cost
4. Uses a simple electrical circuit

Package Includes:

1 x Figaro TGS 2600 Air Quality Sensor

TGS2611-C00 is a semiconductor-type gas sensor that combines very high sensitivity to methane gas with low power consumption and long life. Due to the miniaturization of its sensing chip, TGS2611-C00 requires a heater current of only 56mA, and the device is housed in a standard TO-5 package. TGS2611-C00 possesses a small size and quick gas response, making it suitable for gas leakage checkers. The TGS2611-C00 is able to satisfy the requirements of performance standards such as UL1484 and EN50194.

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

Features:

1. Quick response
2. Low power consumption
3. Long life and low cost
4.  Uses simple electrical circuit

Package Includes:

1 x Figaro TGS2611-C00 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)

This is a sensor that detects hydrogen fluoride concentration and supports three output modes: analog, I2C, and UART. The probe has been calibrated at the factory, which can quickly and accurately measure the concentration of hydrogen fluoride in the environment. Can be widely used in the detection of hydrogen fluoride in industrial and environmental protection fields.

The probe adopts the electrochemical principle, has the characteristics of strong anti-interference ability, high stability, high sensitivity, etc., and the service life is as long as two years. The sensor has 32 modifiable I2C addresses, an integrated temperature compensation algorithm, and a threshold alarm function, It has good compatibility with mainstream main control devices such as Arduino, ESP32, and raspberry pie. The easy-to-use Gravity interface, coupled with our sample code, can quickly build a hydrogen fluoride concentration detector.DFRobot has introduced 12 gas detection sensors in this series, CO, 02, NH3, H2S, NO2, HCL, H2, PH3, SO2, O3, CL2, HF, which are used in exactly the same way and data format, so you can combine them according to your needs.

Features:

1. Factory calibrated, accurate measurement
2. High sensitivity, low power consumption
3. Excellent stability and anti-interference
4. Three output modes: I2C, UART and analog
5. Long service life(2 years)
6. Compatible with 3.3~5.5V main controllers
7. 32 modifiable I2C addresses
8. Reverse connection protection
9. Temperature compensation
10. Threshold alarm
11. It use I2C, UART and analog communication protocol to make smooth commutation between sensor and micro-controller.

Specifications:

1. Detection Gas: Hydrogen fluoride (HF)
2. Detection range: 0~10ppm
3. Working Voltage: 3.3～5.5V DC
4. Working Current: ＜5mA
5. Output Signal: I2C, UART (0~3V), analog voltage
6. Working Temperature: -20～50℃
7. Working Humidity: 15～90%RH (non-condensing)
8. Storage Temperature: -20～50℃
9. Storage Humidity: 15～90%RH (non-condensing)
10. Lifespan: >2 years (in the air)
11. Adapter Plate Size: 37*32mm
12. Compatibility: Arduino, ESP32, Raspberry pi

Package Includes:

1 x DFRobot Gravity HF Sensor (Calibrated) – I2C, UART and analog