P-type Metal Oxide VOC Sensor - VOC-MF1, VOC-PF1, VOC-AF1

​• VOC-xF1: no passive filter fitted
​• Range​: 1 to 100​ppm
• Operating Temperature Range​: -20 to 120​°C
• stable baseline
• low humidity sensitivity
• positive response to gases (safer response)

  • Model Number: VOC-MF1, VOC-PF1, VOC-AF1
  • Data Sheet: Date Sheet File
Quantity:
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  • P-type Metal Oxide VOC Sensor
  • P-type Metal Oxide VOC Sensor
  • P-type Metal Oxide VOC Sensor
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Product Specification

P-type Metal Oxide VOC Sensor Description
This sensor is a broadband total VOC detector. When the cost of a PID is not justifiable, this sensor will detect VOCs with 10-50 ppb limit of detection, depending on the VOC.

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

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)

Volatile Organic Compounds (VOCs) detection for low cost IAQ 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 VOC Sensor Housing options

Housing
VOC
TO-5 metal
VOC-MF1
6-pin Plastic
VOC-PF1
Ex certified metal
VOC-AF1

VOC-xF1: no passive filter fitted


P-type Metal Oxide VOC Sensor PERFORMANCE
Range

ppm isobutylene limit of performance warranty

1 to 100
Sensor resistance (Ro)
kΩ (50% rh, 23 ± 2°C)
220 ±45
Sensor resistance ratio (Rg /Ro x 100%)
%; Isobutylene @ 10ppm in air
285 ±30



Gas response relationship (Rg /Ro - 1 = Σki x Concn)
0.5 +/- 10% (k for isobutylene)
where k= constant for gas i, n = 1 or 0.5 
0.5 (n for isobutylene)



Heater resistance (RH@ RT)
Ω(23 +1°C)
10±1.5
Heater resistance (RH@ sensing temp.)
Ω(400 +10°C)
22±3
Heater resistance (RH@ reset temp.)
Ω(525 +10°C)
26±3
Heater power consumption (mW) typical for 5:1
VH= 2.7±0.2V (400°C)
340±30
       3.7±0.3V (525°C)
530±50
Operating Temperature Range
°C
-20 to 120



P-type Metal Oxide VOC Sensor SENSITIVITY TO OTHER GASES
EtOH sensitivity 
% measured gas @ 10 ppm EtOH
TBA
C3H8 sensitivity
% measured gas @ 500 ppm C3H8
TBA

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