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GAS SENSOR. MQ-131 Datasheet

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GAS SENSOR. MQ-131 Datasheet







MQ-131 SENSOR. Datasheet pdf. Equivalent




MQ-131 SENSOR. Datasheet pdf. Equivalent





Part

MQ-131

Description

GAS SENSOR

Manufacture

ETC

Datasheet
Download MQ-131 Datasheet


ETC MQ-131

MQ-131; TECHNICAL DATA FEATURES Fast response an d High sensitivity Stable and long life Simple drive circuit Wide detecting ra nge APPLICATION They are used in air qu ality control equipments for buildings/ offices, are suitable for detecting Of O3 . SPECIFICATIONS A. Standard work co ndition Symbol Vc VH RL RH PH Symbol Ta o Tas RH Symbol Rs Parameter name Circu it voltage Heating.


ETC MQ-131

voltage Load resistance Heater resistan ce Heating consumption Parameter name U sing Tem Storage Tem Related humidity P arameter name Sensing Resistance Concen tration Slope rate MQ-131 GAS SENSOR Technical condition 5V±0.1 6V±0.1 Var iable 31Ω±5% Less than 1100mw Techni cal condition -10 -50 -20 -70 Less than 95%RH Technical parameter 100KΩ-200K Ω (50ppb O3 ) ≤0.65 Rema.


ETC MQ-131

rks AC or DC AC or DC Room Tem B. Envir onment condition Remarks C. Sensitivit y characteristic Remark 2 Detecting con centration scope 10ppb-2ppm O3 α O3 ( 100ppb/50ppb) Standard Detecting Condit ion Preheat time Temp: 20 ±2 Vc:5V±0 .1 Humidity: 65%±5% Vh: 6V±0.1 Over 2 4 hour D. Structure and configuration, basic measuring circuit 1 2 3 4 5 6 7 8 9 Parts Gas sensing.



Part

MQ-131

Description

GAS SENSOR

Manufacture

ETC

Datasheet
Download MQ-131 Datasheet




 MQ-131
TECHNICAL DATA
MQ-131 GAS SENSOR
FEATURES
Fast response and High sensitivity
Stable and long life
Simple drive circuit
Wide detecting range
APPLICATION
They are used in air quality control equipments for
buildings/offices, are suitable for detecting Of O3 .
SPECIFICATIONS
A. Standard work condition
Symbol
Parameter name
Vc Circuit voltage
VH Heating voltage
RL Load resistance
RH Heater resistance
PH Heating consumption
B. Environment condition
Symbol
Parameter name
Tao Using Tem
Tas Storage Tem
RH Related humidity
C. Sensitivity characteristic
Symbol
Parameter name
Rs Sensing
Resistance
Technical condition
5V±0.1
6V±0.1
Variable
31±5%
Less than 1100mw
Technical condition
-10 -50
-20 -70
Less than 95%RH
Technical parameter
100K-200K
(50ppb O3 )
α O3 Concentration
(100ppb/50ppb) Slope rate
0.65
Standard
Temp: 20 ±2 Vc:5V±0.1
Detecting
Humidity: 65%±5% Vh: 6V±0.1
Condition
Preheat time
Over 24 hour
D. Structure and configuration, basic measuring circuit
Remarks
AC or DC
AC or DC
Room Tem
Remarks
Remark 2
Detecting concentration
scope
10ppb-2ppm O3
Parts
1 Gas sensing
layer
2 Electrode
3 Electrode line
4 Heater coil
5 Tubular ceramic
6 Anti-explosion
network
7 Clamp ring
8 Resin base
9 Tube Pin
Materials
SnO2
Au
Pt
Ni-Cr alloy
Al2O3
Stainless steel gauze
(SUS316 100-mesh)
Copper plating Ni
Bakelite
Copper plating Ni
Fig. 1
AÏ ò
Free Datasheet http://www.datasheet4u.com/





 MQ-131
Structure and configuration of MQ-131 gas sensor is shown as Fig.1, sensor composed by micro AL2O3 ceramic
tube, Metal-oxide semiconductor sensitive layer, measuring electrode and heater are fixed into a crust made by
nylon and stainless steel net. The heater provides necessary work conditions for work of sensitive components.
The enveloped MQ-131 have 6 pin ,4 of them are used to fetch signals, and other 2 are used for providing heating
current.
Electric parameter measurement circuit is shown as above Fig.1.
E. Sensitivity characteristic curve
Fig.3 is shows the typical
sensitivity characteristics of
the MQ-131 for several gases.
in their: Temp: 20
Humidity: 65%
O2 concentration 21%
RL=20k
Ro: sensor resistance in the clean
air.
Rs: sensor resistance at various
concentrations of gases.
Fig.3 sensitivity characteristics of the MQ-131
APPLICATION
Resistance value of MQ-131 is difference to various kinds and various
Concentration gases. When using this components, sensitivity adjustment is very necessary. we recommend
that you calibrate the detector for 50ppb O3 in air and use value of Load resistance that( RL) about 100 K(50K
to 200 K). When accurately measuring, the proper alarm point for the gas detector should be determined after
considering the temperature and humidity influence.
Noting: there are a round hole in the up and down side of the sensors, this design enable the sensor inner gas to
exchange better with outside air, and the sensor shall has higher sensitivity, quicker response and resume time
with a fan .
REFERENCE APPLICATION CIRCUIT:
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