SKU: 87402295253

Gravity: O2 H2S NH3 NO2 O3 H2 HCL HF PH3 Sensor (Calibrated) - I2C & UART

$6885.00 $7650.00
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Description

Gravity: O2 H2S NH3 NO2 O3 H2 HCL HF PH3 Sensor (Calibrated) - I2C & UARTDescription: This is a sensor that detects ammonia 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 ammonia in the environment. Can be widely used in the detection of ammonia in industrial and environmental protection fields. The probe adopts the electrochemical principle, has the characteristics of strong anti interference

Description:

This is a sensor that detects ammonia 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 ammonia in the environment. Can be widely used in the detection of ammonia 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 Pi. The easy-to-use Gravity interface, coupled with our sample code, can quickly build an ammonia concentration detector.

DFRobot has introduced 12 gas detection sensors in this series, CO, O2, 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:

  • Strong anti-interference ability
  • High stability
  • High sensitivity

Documents:


GRAVITY: HF Sensor 

Applications:

  • Industrial hydrogen fluoride detection
  • Environmental protection device

Specifications:

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

Part List:

  • Gravity: HF Signal Conversion Board x1
  • HF sensor probe x1
  • Gravity - 4pin Cable x1


GRAVITY: HCL Sensor 

Applications:

  • Industrial hydrogen chloride detection
  • Undergorund hydrogen chloride detection
  • Environmental protection device

Specifications:

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

Part List:

  • Gravity: HCL Signal Conversion Board x1
  • HCL sensor probe x1
  • Gravity - 4pin Cable x1


GRAVITY: PH3 Sensor 

Applications:

  • Industrial phosphine detection
  • Mining phosphine detection
  • Environmental protection device

Specifications:

  • Detection Gas: Phosphine (PH3)
  • Detection range: 0~1000ppm
  • Working Voltage: 3.3～5.5V DC
  • Working Current: ＜5mA
  • Output Signal: I2C, UART (0~3V), analog voltage
  • Working Temperature: -20～50℃
  • Working Humidity: 15～90%RH (non-condensing)
  • Storage Temperature: -20～50℃
  • Storage Humidity: 15～90%RH (non-condensing)
  • Lifespan: >2 years (in the air)
  • Adapter Plate Size: 37*32mm
  • Compatibility: Arduino, ESP32, Raspberry pi

Part List:

  • Gravity: PH3 Signal Conversion Board x1
  • PH3 sensor probe x1
  • Gravity - 4pin Cable x1


GRAVITY: NO2 Sensor 

Applications:

  • Industrial nitrogen dioxide detection
  • Underground nitrogen dioxide detection
  • Environmental protection device

Specifications:

  • Detection Gas: Nitrogen Dioxide(NO2)
  • Detection range: 0~20ppm
  • Working Voltage: 3.3～5.5V DC
  • Working Current: ＜5mA
  • Output Signal: I2C, UART (0~3V), analog voltage
  • Working Temperature: -20～50℃
  • Working Humidity: 15～90%RH (non-condensing)
  • Storage Temperature: -20～50℃
  • Storage Humidity: 15～90%RH (non-condensing)
  • Lifespan: >2 years (in the air)
  • Adapter Plate Size: 37*32mm
  • Compatibility: Arduino, ESP32, Raspberry pi

Part List:

  • Gravity: NO2 Signal Conversion Board x1
  • NO2 sensor probe x1
  • Gravity - 4pin Cable x1


GRAVITY: NH3 Sensor 

Applications:

  • Industrial ammonia detection
  • Environmental protection device

Specifications:

  • Detection Gas: Ammonia (NH3)
  • Detection range: 0~100ppm
  • Working Voltage: 3.3～5.5V DC
  • Working Current: ＜5mA
  • Output Signal: I2C, UART (0~3V), analog voltage
  • Working Temperature: -20～50℃
  • Working Humidity: 15～90%RH (non-condensing)
  • Storage Temperature: -20～50℃
  • Storage Humidity: 15～90%RH (non-condensing)
  • Lifespan: >2 years (in the air)
  • Adapter Plate Size: 37*32mm
  • Compatibility: Arduino, ESP32, Raspberry pi

Part List:

  • Gravity: NH3 Signal Conversion Board x1
  • NH3 sensor probe x1
  • Gravity - 4pin Cable x1


GRAVITY: H2 Sensor 

Applications:

  • Industrial hydrogen detection
  • Environmental protection device

Specifications:

  • Detection Gas: Hydrogen (H2)
  • Detection range: 0~1000ppm
  • Working Voltage: 3.3～5.5V DC
  • Working Current: ＜5mA
  • Output Signal: I2C, UART (0~3V), analog voltage
  • Working Temperature: -20～50℃
  • Working Humidity: 15～90%RH (non-condensing)
  • Storage Temperature: -20～50℃
  • Storage Humidity: 15～90%RH (non-condensing)
  • Lifespan: >2 years (in the air)
  • Adapter Plate Size: 37*32mm
  • Compatibility: Arduino, ESP32, Raspberry pi

Part List:

  • Gravity: H2 Signal Conversion Board x1
  • H2 sensor probe x1
  • Gravity - 4pin Cable x1


GRAVITY: O3 Sensor 

Applications:

  • Industrial ozone detection
  • Environmental protection device

Specifications:

  • Detection Gas: ozone (O3)
  • Detection range: 0~10ppm
  • Working Voltage: 3.3～5.5V DC
  • Working Current: ＜5mA
  • Output Signal: I2C, UART (0~3V), analog voltage
  • Working Temperature: -20～50℃
  • Working Humidity: 15～90%RH (non-condensing)
  • Storage Temperature: -20～50℃
  • Storage Humidity: 15～90%RH (non-condensing)
  • Lifespan: >2 years (in the air)
  • Adapter Plate Size: 37*32mm
  • Compatibility: Arduino, ESP32, Raspberry pi

Part List:

  • Gravity: O3 Signal Conversion Board x1
  • O3 sensor probe x1
  • Gravity - 4pin Cable x1


GRAVITY: O2 Sensor 

Applications:

  • Air quality monitoring device
  • Mining air detection
  • Environmental protection
  • Smart Farming

Specifications:

  • Detection Gas: Oxygen (O2)
  • Detection range: 0~25%Vol
  • Working Voltage: 3.3～5.5V DC
  • Working Current: ＜5mA
  • Output Signal: I2C, UART (0~3V), analog voltage
  • Working Temperature: -20～50℃
  • Working Humidity: 15～90%RH (non-condensing)
  • Storage Temperature: -20～50℃
  • Storage Humidity: 15～90%RH (non-condensing)
  • Lifespan: >2 years (in the air)
  • Adapter Plate Size: 37*32mm
  • Compatibility: Arduino, ESP32, Raspberry pi

Part List:

  • Gravity: Oxygen / O2 Signal Conversion Board x1
  • Oxygen / O2 sensor probe x1
  • Gravity - 4pin Cable x1


GRAVITY: H2S Sensor 

Applications:

  • Underground hydrogen sulfide detection
  • Industrial hydrogen sulfide detection
  • Environmental protection device

Specifications:

  • Detection Gas: Hydrogen sulfide (H2S)
  • Detection range: 0~100ppm
  • Working Voltage: 3.3～5.5V DC
  • Working Current: ＜5mA
  • Output Signal: I2C, UART (0~3V), analog voltage
  • Working Temperature: -20～50℃
  • Working Humidity: 15～90%RH (non-condensing)
  • Storage Temperature: -20～50℃
  • Storage Humidity: 15～90%RH (non-condensing)
  • Lifespan: >2 years (in the air)
  • Adapter Plate Size: 37*32mm
  • Compatibility: Arduino, ESP32, Raspberry pi

Part List:

  • Gravity: H2S Signal Conversion Board x1
  • H2S sensor probe x1
  • Gravity - 4pin Cable x1


GRAVITY: CL2 Sensor 

Applications:

  • Chemical chlorine detection
  • pharmaceutical production chlorine detection
  • Environmental protection device

Specifications:

  • Detection Gas: Chlorine (CL2)
  • Detection range: 0~20ppm
  • Working Voltage: 3.3～5.5V DC
  • Working Current: ＜5mA
  • Output Signal: I2C, UART (0~3V), analog voltage
  • Working Temperature: -20～50℃
  • Working Humidity: 15～90%RH (non-condensing)
  • Storage Temperature: -20～50℃
  • Storage Humidity: 15～90%RH (non-condensing)
  • Lifespan: >2 years (in the air)
  • Adapter Plate Size: 37*32mm
  • Compatibility: Arduino, ESP32, Raspberry pi

Part List:

  • Gravity: Chlorine Signal Conversion Board x1
  • Chlorine sensor probe x1
  • Gravity - 4pin Cable x1


GRAVITY: CO Sensor 

Applications:

  • Petrochemical carbon monoxide detection
  • Metallurgy carbon monoxide detection
  • Mining carbon monoxide detection
  • Environmental protection

Specifications:

  • Detection Gas: Carbon Monoxide (CO)
  • Detection range: 0~1000ppm
  • Working Voltage: 3.3～5.5V DC
  • Working Current: ＜5mA
  • Output Signal: I2C, UART (0~3V), analog voltage
  • Working Temperature: -20～50℃
  • Working Humidity: 15～90%RH (non-condensing)
  • Storage Temperature: -20～50℃
  • Storage Humidity: 15～90%RH (non-condensing)
  • Lifespan: >2 years (in the air)
  • Adapter Plate Size: 37*32mm
  • Compatibility: Arduino, ESP32, Raspberry pi

Part List:

  • Gravity: CO Signal Conversion Board x1
  • CO sensor probe x1
  • Gravity - 4pin Cable x1
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 87402295253

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Trevor
Louisville, US
★★★★★ 5
Awesome value shoes
Size: 11.5, Color: Ivory/White/British Tan, Size: 11.5, Color: Ivory/White/British Tan
These white Cole Haan shoes are just what I hoped for, the color is a perfect off-white, somewhere between cream and pure white, which gives them a more refined look. The quality feels excellent, they’re very comfortable right out of the box, and the laces feel durable and well-made. They fit true to size with no issues. Based on this experience, I’ll definitely be buying more from this brand in the future especially at this price point.
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Reviewed in the United States on June 18, 2025
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Maribel de Oleo
Charlottesville, US
★★★★★ 5
SNEAKERS OF THE GREAT MATERIAL
Size: 9, Color: White/Black/White
THE SNEAKERS ARE CONFORTABLE AND REALLY GOOD MATERIAL FOR THE ALL USE.
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Reviewed in the United States on February 25, 2026
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David Robles
Natrona Heights, US
★★★★★ 5
Love them!!!
Size: 8, Color: Black/White/Black
Great!!!!
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Reviewed in the United States on May 6, 2026
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David F.
Los Angeles, US
★★★★★ 5
Great looking shoes. Can’t beat Cole Hahn
Size: 11.5, Color: Optic White/Navy Blazer/Optic White
Great looking shoes and very comfortable. I had to go down 1/2 a size from 12 to 11 1/2. I would recommend them 💯%.
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Reviewed in the United States on June 6, 2026
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Orlando A.
Lake Worth, US
★★★★★ 5
Excelente producto
Size: 8.5, Color: Navy Blazer/British Tan/Ivory
Las tallas pueden ser muy pequeñas par la talla real puede ser la orma del zapato
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Reviewed in the United States on May 23, 2026

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