Tin Dioxide Semiconductor Gas Sensor for CO Detection - SB-500-12
? Target gas: Carbon Monoxide
? Heater voltage (high): 0.9 V ± 5%
? Heater voltage (low): 0.2 V ± 5%
? Circuit voltage: Less than 5 V
? Operating temperature: -10°C to 60°C
? Storage temperature: -30°C to 100°C
? Relative humidity: Less than 95% RH
? Sensor resistance: 4.5 k? - 40 k?
- Quantity:
- - +
Product Specification
SB-500-12?Carbon Monoxide Sensor?CO Sensor?Description
The SB-500-12 is a tin dioxide semiconductor gas sensor which has an excellent performance in CO detection. Using a mini-bead type sensing element with a periodic temperature change operation method, high sensitivity, selectively, small effect from humidity and other remarkable characteristics have been achieved. The SB-500-12 realizes the development of reliable CO detection devices.
SB-500-12?Carbon Monoxide Sensor?CO Sensor?Application
? Home gas leak detector
SB-500-12?Carbon Monoxide Sensor?CO Sensor?Specifications
Standard Operating conditions |
|||
Symbol |
Parameter |
Specification |
Conditions etc. |
VH?(H) |
Heater voltage?(high) |
0.9 V ± 5% |
AC, DC or pulse |
VH?(L) |
Heater voltage?(low) |
0.2 V ± 5% |
AC, DC or pulse |
VC |
Circuit voltage |
Less than 5 V |
DC: Pin2 (+) - Pin 1 (-) |
RL |
Load resistance |
Variable (> 200 ?) |
PS?< 10 mW |
RH |
Heater resistance |
2.8 ? ± 0.2 ? |
at room temperature |
TH?(H) |
Heating time (high) |
5 sec ± 0.1 sec |
|
TH?(L) |
Heating time (low) |
20 sec ± 0.1 sec |
|
DT (L) |
Detection timing (low) |
< 0.1 sec |
before switching to LOW |
IS?(H) |
Current?consumption (high) |
132mA ± 15mA |
VH=0.9V |
IS?(L) |
Current?consumption (low) |
59mA ± 10mA |
VH=0.2V |
PS |
Power dissipation
|
Less than?10 mW |
|
Environmental conditions |
|||
Symbol |
Parameter |
Specification |
Conditions etc. |
Tao |
Operating?temperature |
-10°C to 60°C |
Recommended range |
Tas |
Storage?temperature |
-30°C to 100°C |
|
RH |
Relative humidity |
Less than 95% RH |
|
(O2) |
Oxygen?concentration |
21% ± 1% (Standard condition) |
Absolute minimum level: more than 18% |
The sensitivity characteristics are influenced by the variation in oxygen concentration. Please consult FIS for details. |
|||
Sensitivity characteristics |
|||
Model |
SB-500-12 |
||
Symbol |
Parameter |
Specification |
Conditions?etc. |
RS |
Sensor resistance |
4.5 k? - 40 k? |
at 100ppm of CO |
α(30-100) |
Sensitivity slope (30?- 100 ppm) |
1.05 to 2.1 |
log (RS(30 ppm)?/ RS(100 ppm)) log (30/100) |
α(100-300) |
Sensitivity slope (100 -?300 ppm) |
0.5 to 1.0 |
log?(RS(300 ppm)?/ RS(100 ppm))
log?(300/100)
|
Standard Test Conditions: |
Temp: 20°C ± 2°C Humidity: 65% ± 5% (in clean air)? |
VC? ? ? ?????: 5.0 V ± 5%
VH?(high)?: 0.9 V ± 5% VH?(low)??: 0.2 V ± 5% ?RL? ? ??????: 10 k? ± 1% |
|
Pre-heating time: more than 4 days |
|||
Mechanical characteristics |
|||
Items |
Conditions |
Specifications |
|
Vibration |
Frequency: Acceleration: Sweep time: |
5?-?500 Hz 1.3G 40 min. |
Should satisfy the specifications shown in the sensitivity characteristics after test. |
Drop |
Height: Number of impacts: |
60 cm 3 times |
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