GM-502B MEMS VOC Gas Sensor
Product description
MEMS combustible gas sensor is using MEMS
micro-fabrication hot plate on a Si substrate base,
gas-sensitive materials used in the clean air with low
conductivity metal oxide semiconductor material.
When the sensor exposed to gas atmosphere, the
conductivity is changing as the detected gas
concentration in the air. The higher the concentration
of the gas, the higher the conductivity. Use simple
circuit can convert the change of conductivity of the gas
concentration corresponding to the output signal.
Character:
MEMS technology, strong structure
Low power consumption
High sensitivity
Fast response and resume
Simple drive circuit
Application
Gas leak detection for mobile phones, computers and other consumer electronics applications,
also for breathing gas detection control, smoke alarm indoor & etc.
Main Parameter:
Part No.
GM-502B
Sensor Type
MEMS VOC Sensor
Standard Encapsulation
Ceramic
Detection Gas
Ethanol, formaldehyde, toluene &etc.
Detection Range
1~500ppm
Standard Circuit
Conditions
Loop Voltage
V
C
≤24V DC
Heater Voltage
V
H
2.5V±0.1V AC or DC
Load Resistance
R
L
Adjustable
Sensor character
under standard
test conditions
Heater
Resistance
R
H
80Ω±20Ω
（
room temperature
）
Heater
consumption
P
H
≤50mW
sensitive
materials
resistance
R
S
1KΩ
～
30KΩ(in 50ppm ethanol)
Sensitivity
S
R
0
(in air)/Rs( in 50ppm ethanol )≥3.0
Standard test
conditions
Temp. Humidity
20
℃
±2
℃
；
55%±5%RH
Standard test circuit
V
H
:2.5V±0.1V
；
V
C
:5.0V±0.1V