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H2S-AF1 P-Type Metal Oxide Hydrogen Sulfide (H2S) Sensor
Category:Electronic Components & Supplies/Active Components/Sensors
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P-Type Metal Oxide Hydrogen Sulfide (H2S) Sensor Description
This sensor responds well in the temperature and humidity extremes of the oil and gas industry.

Unlike common n-type sensors, this p-type sensor has a large dynamic range, repeatable response, low humidity response and resistance increases in the presence of H2S.

The change in resistance can be converted to an output voltage via a simple electrical circuit. Although the sensor can be used in constant temperature/ voltage mode, best response is achieved when the sensor is cycled between 400°C (sensing temperature) and 525°C (reset temperature). 

Developed over many years, our p-type metal oxide gas sensors offer the following benefits:
• stable baseline
• low humidity sensitivity
• positive response to gases (safer response)

H2S detection at high temperatures (up to 120°C) for oil and gas applications

Each sensor type can be supplied in three housings:
• Ex housing - stainless steel 316 housing with UL, CSA, ATEX and IECEx approvals, unique for metal oxides, allowing use in hazardous areas without the need for an IS circuit

H2S-AF1: no passive filter fitted


P-Type Metal Oxide Hydrogen Sulfide (H2S) Sensor PERFORMANCE
Range ppm H2S 1 to 100
Sensor resistance (Ro) kΩ (50% rh, 23 ±2°C) 280 ±50
Sensor resistance (Rg) kΩ H2S @ 24ppm in air 1500 ±500
Sensor resistance ratio (Rg/Ro x 100%) % H2S @ 24ppm in air 550 ±100
Gas response (Rg/Ro - 1 = k.Concn) k 0.5 ± 0.1
  n 0.7 ± 0.05
Heater resistance (RH@ 23 ±2°C) 10.5 ±1.5
Heater resistance (RH@ 400 ±10°C) 25 ±3
Heater resistance (RH@ 525 ±10°C) 29 ±3
Heater power consumption (mW) VH = 2.7 ±0.2V (400°C) 360 ±30
  VH = 3.7 ±0.3V (525°C) 550 ±50
Operating Temperature Range °C -20 to 120
P-Type Metal Oxide Hydrogen Sulfide (H2S) Sensor CROSS SENSITIVITY
H2 sensitivity % measured gas @ 100 ppm H2 TBA
EtOH sensitivity % measured gas @ 50 ppm EtOH TBA
C3H8 sensitivity % measured gas @ 500 ppm C3H8 TBA
NH3 sensitivity % measured gas @ 25 ppm NH3 TBA
SO2 sensitivity % measured gas @ 25 ppm SO2 TBA


Basic Product Details
  • Production Capacity:3000 Piece/Pieces per Month
  • Delivery Time:5~7 work days
  • Min.Order Quantity:1   Piece/Pieces
  • Port:HK
  • Payment Terms:T/T
  • Main Markets:
Contact Information
  • Company Name:Week technology ltd
  • Contact Person:Ms Lieen li
  • Telephone:0086-755-83289069
  • Fax:0086-755-83289052
  • Country/Territory:China
  • Address:16 Floor, Building #3, Zhongke Mansion, Gaoxin South 1st Rd, Hi-Tech Park, Nanshan, Shenzhen, Guangdong, China (Mainland)
  • Zipcode:51800
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