Semiconductor Gas Sensor

woundcallousΗμιαγωγοί

1 Νοε 2013 (πριν από 3 χρόνια και 7 μήνες)

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Semiconductor Gas Sensor


tin oxide semiconductor gas sensor
(
SnO
2
)


model SP
-
31 from FIS Company

Alcohol Over limit Ignite Protection Unit

Semiconductor gas sensor

Alcohol Over limit Ignite Protection Unit

Test and Evaluated method


Test procedure

1
)
Voltage measurement for vary alcohol vapor

Purposed system

System Structure

Alcohol Over limit Ignite Protection Unit

Test method



Test by alcohol vapor

Alcohol Over limit Ignite Protection Unit

Alcohol Simulator

Alcohol Simulator

Guth Labaratories inc.


Model AS
-
2110
-
DR


Guth Model 2100

Alcohol Simulator

1
.
1 liter glass bottle

2
.
Temperature Control

3
.
Air pump Flow rate

4
.
2
L/min

4. Aluminum pipe

Standard Alcohol solution

Alcohol vapor simulation
method


1
)
put alcohol solution to alcohol simulator



2
)
warm alcohol till 34C


3
)
Flow air from pump through alcohol
simulator

Alcohol Simulator



Used
25

mg%

50

mg%
และ

100

mg% of alcohol
solution


Simulated alcohol vapor used flow rate

4
.
2
liters
/
minute

(
air
pump
)
duration

10
second, each
5
samples

Test Method


1
)
Test for alcohol vapor reading


2
)
Protection Test


Reading Results


Table

1

result from vary of alcohol solution


Protection results

Conclusions

1.
80 % trusted on protection

2.
Focus to uses on Bus

3.
Developed for easy to use

4.
Improved accuracy

5.
Compensated sensor from Temperature and Humidity

Alcohol Over limit Ignite Protection Unit

Thank you for

Don’t drive drunk