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Tin Dioxide Semiconductor Gas Sensor for Methane Detection - SB-12A-00

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• Target gas: Methane/Hydrocarbons/Hydrogen
• Operating temperature: -10°C to 50°C
• Storage temperature: -30°C to 100°C
• Relative humidity: Less than 95% RH
• Sensor resistance: 0.2kΩ to 1.0kΩ
• Home gas leak detector

Model Number: SB-12A-00
Data Sheet:

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Product Specification

SB-12A-00 Methane Gas Sensor Description
The SB-12A is a tin dioxide semiconductor gas sensor which has an excellent performance in methane detection with significant low power consumption concept (120mW).

High sensitivity, low sensitivity to noise gases, quick response speed and strong poisoning resistance features achieve reliable gas detection system applications.

SB-12A-00 Methane Gas Sensor Application
• Home gas leak detector

SB-12A-00 Methane Gas Sensor Specifications

Standard Operating conditions
Symbol	Parameter	Specification	Conditions etc.
V_H	Heater voltage	0.9 V ± 0.05 V	AC, DC or pulse
V_C	Circuit voltage	Less than 5 V	DC: Pin2 (+) - Pin 1 (-)
R_L	Load resistance	Variable (> 200 Ω)	P_S < 10 mW
RH	Heater resistance	2.8 Ω ± 0.2 Ω	at room temperature
I_H	Heater current	132 mA	I_H = V_H / R_H (typical value)
P_H	Heater power consumption	120 mW	P_H = V_H² / R_H (typical value)
Environmental conditions
Symbol	Parameter	Specification	Conditions etc.
Tao	Operating temperature	-10°C to 50°C	Recommended range
Tas	Storage temperature	-30°C to 100°C
R_H	Relative humidity	Less than 95% RH
(O2)	Oxygen concentration	21% ± 1% (Standard condition)	Absolute minimum level: more than 18%
(O2)	Oxygen concentration	The sensitivity characteristics are influenced by the variation in oxygen concentration.
Sensitivity characteristics
Model	SB-12A-00
Symbol	Parameter	Specification	Conditions etc.
R_S	Sensor resistance	0.2kΩ to 1.0kΩ	at CH4 3000 ppm
β	slope	0.45 to 0.65	Rs (at CH4 3000 ppm) Rs (at CH4 1000 ppm)
Ethanol selectivity		≥ 5.0	Rs (at C2H5OH 1000 ppm) Rs (at CH4 3000 ppm)
Sensitivity of CH4		≥ 9.0	Rs (in air) Rs (at CH4 3000 ppm)
Standard Test Conditions:		Temp: 20°C ± 2°C Humidity:65% ± 5% (in clean air)	VC : 5.0 V ± 1% VH : 5.0 V ± 1% RL : 10 kΩ ± 5%
Standard Test Conditions:		Pre-heating time: more than 48 hours
Low temperature dependency		1.2 ± 0.2	Rs (CH4 3000 ppm at -10°C ) Rs (CH4 3000 ppm at 20°C 65%)
High temperature dependency		0.85 ± 0.15	Rs (CH4 3000 ppm at 50°C 60%) Rs (CH4 3000 ppm at 20°C 65%)
Mechanical characteristics
Items	Conditions		Specifications
Vibration	Frequency: Acceleration: Sweep Time:	5 - 500 Hz 1.3 G 40 min.	Should satisfy the specifications shown in the sensitivity characteristics after test.
Drop	Height: Number of impacts:	60 cm 3 times