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Gas Sensor
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| Type |
All-in-one (with a sensor and a temperature compensation device) |
| Model |
MI-02 |
| Sensing Type |
Catalytic Combustion (Hot Wire) Type
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| Detectable Gases |
Methane, Butane, LNG, LPG |
| Bridge Voltage |
DC 2.3V ¡¾10% |
| Current to Element
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Less than 210mA ¡¾ 10mA |
| Power Consumption |
0.46 W ¡¾10%
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| Initial Stabilization Time |
30 secs ¡¾10%
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| Response Speed |
Within 10 secs |
| Temperature Catalyst
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425¡ÆC ¡¾ 15¡ÆC (Calculating Valve)
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| Temperature Range |
-20¡ÆC ~ 50¡É |
| Platinum coil resistance |
2.1¥Ø ¡¾0.05 ¥Ø |
| Straight |
Very Good |
Sensitivity in Voltage
from Bridge |
Higher than 22mV at0.20% of iso-butane(i-C4H10) or 0.04% of Methane (CH4)
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| Sensor Duration |
More Than 3 Year
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| 1.OUTLINE DRAWING (MI-02) |
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| 2.
DENSITY AND SENSITIVITY |
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| COMBUSTIBLE |
DENSITY |
SENSITIVITY(mV) |
REMARKS |
| GAS |
(%) |
(ppm) |
%
Of LEL |
AVE |
Min |
Max |
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ISO-BUTANE
(I-C4H10)
LEL:1.8%
S.G.:2.00
633Kcal/mol |
0.066 |
660 |
3.7 |
7.8 |
6.5 |
9.3 |
Not more than 10.0mV |
| 0.100 |
1,000 |
5.6 |
12.8 |
11.1 |
14.8 |
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| 0.200 |
2,000 |
11.1 |
22.8 |
19.5 |
26.2 |
| 0.300 |
3,000 |
16.7 |
31.4 |
26.4 |
35.9 |
| 0.400 |
4,000 |
22.2 |
39.1 |
32.3 |
44.6 |
| 0.500 |
5,000 |
27.8 |
46.3 |
38.0 |
52.4 |
| 0.600 |
6,000 |
33.3 |
52.9 |
43.5 |
60.0 |
| 0.700 |
7,000 |
38.9 |
61.1 |
49.7 |
69.6 |
| 0.800 |
8,000 |
44.4 |
66.3 |
54.4 |
75.6 |
| 0.900 |
9,000 |
50.0 |
70.9 |
57.7 |
81.5 |
| 1.000 |
10,000 |
55.6 |
75.7 |
60.9 |
85.3 |
METHANE
(CH4)
LEL: 5.0%
S.G.: 0.55
192Kcal/mol |
0.080 |
800 |
1.6 |
4.3 |
2.8 |
6.7 |
Not more than 10.0mV |
| 0.200 |
2,000 |
4.0 |
12.0 |
10.5 |
14.0 |
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| 0.320 |
3,200 |
6.4 |
19.5 |
17.0 |
22.5 |
| 0.400 |
4,000 |
8.0 |
24.3 |
21.5 |
28.1 |
| 0.520 |
5,200 |
10.4 |
31.9 |
28.3 |
36.7 |
| 0.600 |
6,000 |
12.0 |
37.1 |
33.2 |
42.1 |
| 0.720 |
7,200 |
14.4 |
44.7 |
40.0 |
50.2 |
| 0.800 |
8,000 |
16.0 |
50.1 |
44.0 |
56.4 |
| 0.920 |
9,200 |
18.4 |
58.2 |
52.2 |
65.5 |
| 1.000 |
10,000 |
20.0 |
63.7 |
57.3 |
71.2 |
| 1.120 |
11,200 |
22.4 |
71.4 |
63.9 |
80.2 |
| 1.200 |
12,000 |
24.0 |
76.8 |
68.8 |
85.5 |
| 1.400 |
14,000 |
28.0 |
89.0 |
80.0 |
98.3 |
| 1.600 |
16,000 |
32.0 |
99.3 |
89.6 |
108.5 |
| 1.800 |
18,000 |
36.0 |
110.3 |
100.2 |
119.1 |
| 2.000 |
20.000 |
40.0 |
121.0 |
110.6 |
130.9 |
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| 3.
RECOMMENDABLE CIRCUIT DIAGRAM |
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| ¡Ø Actions to produce good quality products |
1) Using pure raw materials (99.99%) such as Pt Wire and catalyst
2) Standardizing pitch, diameter and turn in accordance with the automation of Coiling (Pt-Wire)
3) Welding: constant welding part and welding by using the jig
4) Electro-coating: standardization of the carrier (The constant form and mass of the carrier)
5) Automatic resistance measure: Constant specific resistance of a coil and a sensor
6) Standardization of the product output value (sensing) thanks to the automatic sensing measurement |
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| ¢ºEliminating factors which give adverse effects to the quality with the standardization of the operation methods including aging process |
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