• Manufacturer: Seeed Technology Co., Ltd
• Type: Natural Gas, Propane
• Operating Temperature: -10°C ~ 50°C
• Voltage - Supply: 5V

• Manufacturer: Renesas Electronics America Inc
• Type: Air Quality
• Operating Temperature: -40°C ~ 65°C
• Voltage - Supply: 1.7V ~ 3.6V
• Current - Supply: 11mA
• Accuracy: ±15%
• Output: I²C

• Manufacturer: SST Sensing Ltd.
• Series: Zirconia
• Type: Oxygen
• Operating Temperature: 10°C ~ 85°C
• Voltage - Supply: 24V
• Current - Supply: 500mA
• Accuracy: ±1%
• Output: 4mA ~ 20mA

• Manufacturer: Amphenol Telaire
• Series: T3000
• Type: Carbon Dioxide (CO2)
• Operating Temperature: 0°C ~ 50°C
• Voltage - Supply: 18 VAC ~ 30VAC RMS, 18 VDC ~ 42 VDC
• Accuracy: ±5%
• Output: 4mA ~ 20mA

• Manufacturer: Comet America, LP
• Type: Carbon Dioxide (CO2)
• Operating Temperature: -20°C ~ 60°C
• Accuracy: ±3%

• Manufacturer: Honeywell Sensing and Productivity Solutions
• Series: MF020
• Type: Oxygen
• Operating Temperature: -10°C ~ 50°C
• Voltage - Supply: 22.8V ~ 25.2V
• Current - Supply: 500mA
• Accuracy: ±2%
• Output: 0 V ~ 10 V
• Oxygen Range: 1 mbar ~ 250 mbar

• Manufacturer: SPEC Sensors, LLC
• Type: Carbon Monoxide (CO)
• Operating Temperature: -20°C ~ 40°C
• Voltage - Supply: 2.6V ~ 3.6V
• Current - Supply: 4mA
• Accuracy: ±15%
• Output: USB

• Manufacturer: City Technology

• Manufacturer: Renesas Electronics America Inc
• Type: Air Quality
• Operating Temperature: 0°C ~ 25°C
• Voltage - Supply: 1.7V ~ 3.6V
• Current - Supply: 13mA
• Accuracy: ±2%
• Output: I²C

• Manufacturer: Amphenol Telaire
• Series: Ventostat®
• Type: Carbon Dioxide (CO2)
• Operating Temperature: 0°C ~ 50°C
• Voltage - Supply: 18V ~ 40V
• Current - Supply: 40mA
• Accuracy: ±5%
• Output: 0 V ~ 5 V

• Manufacturer: Amphenol SGX Sensortech
• Series: VQ600
• Type: Methane
• Operating Temperature: -20°C ~ 60°C
• Voltage - Supply: 2V
• Current - Supply: 300mA
• Output: Voltage

• Manufacturer: DFRobot
• Type: Air Quality
• Operating Temperature: -40°C ~ 85°C
• Voltage - Supply: 3.3V ~ 5.5V
• Current - Supply: 5mA
• Output: I²C, SPI
• Oxygen Range: 300 mbar ~ 1.1 bar

• Manufacturer: KEMET
• Series: QGC
• Type: Carbon Dioxide (CO2)
• Operating Temperature: -40°C ~ 85°C
• Voltage - Supply: 2.7V ~ 8V
• Output: Voltage

• Manufacturer: Amphenol SGX Sensortech
• Series: PS4
• Type: Carbon Monoxide (CO)
• Operating Temperature: -40°C ~ 55°C
• Oxygen Range: 800 mbar ~ 1.2 bar

• Manufacturer: DFRobot
• Type: Carbon Monoxide (CO)
• Operating Temperature: -20°C ~ 50°C
• Voltage - Supply: 5V
• Output: 0 V ~ 5 V