Product introduction
H2S sensors H2S-MFF, H2S-PFF, H2S-AFFIntroduction
H2S sensorsRespond well in extreme humidity and temperature environments in the oil and gas industry. In addition, the sensor is equipped with an integrated filter, giving it selectivity for H2S. Unlike common n-type sensors, this metal oxide sensor has a large dynamic range, repeatable response, low humidity influence, and its resistance increases when exposed to most H2S. The change in resistance can be converted to an output voltage through simple electrical circuitry. Although the sensor can operate in constant temperature/voltage mode, it responds best when cycled between 400°C (sensing temperature) and 525°C (reset temperature). See application notes for details.
H2S sensors H2S-MFF, H2S-PFF, H2S-AFFFeatures
Large dynamic range
Repeatable response
Low humidity influence
Good selectivity for H2S
H2S sensors H2S-MFF, H2S-PFF, H2S-AFF performance
| Range |
ppm H2S |
1~100 |
| Sensor resistance (R0） |
kΩ (50% rh, 23 (± 2)℃) |
220±50 |
| Sensor resistance (Rg） |
kΩ；H2S@In air24ppm |
1900 ±500 |
| Sensor resistance ratio (R9/R0*100%） |
%；H2S@In air24ppm |
860 ±250 |
| Gas response relationship(Rg/Ro - 1 = k.Conc) |
ppm-1 (5 - 30 ppm) |
0.30 ± 0.09 |
| Gas response relationship(Rg/Ro - 1 = k.Conc0.5) ppm-1 (30 - 100 ppm) |
0.24 ± 0.07 |
|
| Heater resistance(RH @ 23±1℃) |
Ω |
10 ±1.5 |
| Heater resistance(RH @400 ±10℃) |
Ω |
22 ±3 |
| Heater resistance(RH @525±10℃) |
Ω |
26 ±3 |
| Heater power consumption (mW） |
VH = 2.7 ±0.2V (400℃) |
340 ±30 |
| 3.7 ±0.3V (525℃) |
530 ±50 |
|
| Operating temperature range |
℃ |
-20~120 |
