P-Type Metal Oxide Hydrogen Sulfide Sensor - H2S-MFF, H2S-PFF, H2S-AFF

• H2S-xFF: equipped with a PTFE-based dust/water filter
• Range: 1 to 100 ppm H2S
• Operating Temperature Range: -20 to 120 °C
• stable baseline
• low humidity sensitivity
• positive response to gases (safer response)

  • Model Number: H2S-MFF, H2S-PFF, H2S-AFF
  • Data Sheet: Date Sheet File
Quantity:
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  • P-Type Metal Oxide Hydrogen Sulfide Sensor
  • P-Type Metal Oxide Hydrogen Sulfide Sensor
  • P-Type Metal Oxide Hydrogen Sulfide Sensor
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Product Specification

P-Type Metal Oxide Hydrogen Sulfide Sensor 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:
• TO-5 metal can, the most common format
• Plastic 6-pin housing - frequently used with other metal oxide gas sensors
• 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

P-Type Metal Oxide Hydrogen Sulfide Sensor H2S Sensor Housing options

Housing
H2S
TO-5 metal
H2S-MFF
6-pin Plastic
H2S-PFF
Ex certified metal
H2S-AFF
H2S-xFF: equipped with a PTFE-based dust/water filter

P-Type Metal Oxide Hydrogen Sulfide Sensor 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 Sensor 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

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