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Tin Dioxide Semiconductor Gas Sensor for Hydrocarbon Detection - SB-11A-00

? Target gas: Methane/Propane/Hydrocarbons/Hydrogen
? Heater voltage: 0.9 V ± 0.05 V
? Circuit voltage: Less than 5 V
? Operating temperature: -20°C to 50°C
? Storage temperature: -20°C to 70°C
? Relative humidity: Less than 95% RH
? Sensor resistance: 0.2k? to 1.0 k?
? Home gas leak detector

Model Number: SB-11A-00
Data Sheet:

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Product Specification

SB-11A-00 Hydrocarbon Gas Sensor Description
The SB-11A is a tin dioxide semiconductor gas sensor which has an excellent performance in methane, propane, butane and other hydrocarbons 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-11A-00 Hydrocarbon Gas Sensor Application
? Home gas leak detector

SB-11A-00 Hydrocarbon Gas Sensor Specifications

Standard Operating conditions
Symbol	Parameter	Specification	Conditions etc.
V_H	Heater voltage	0.9 V ± 0.05 V	AC or DC
V_C	Circuit voltage	Less than 5 V	DC (polarity is important)
R_L	Load resistance	Variable (> 200 ?)	P_S < 10 mW
R_H	Heater resistance	2.8 ? ± 0.2 ?	at room temperature
I_H	Heater current	130 mA	I_H = V_H / R_H (typical value)
P_H	Heater power consumption	120 mW	P_H = V_H² / R_H (typical value)
P_S	Power dissipation of sensing element	Less than 10 mW	P_S = (V_C - V_RL)²/R_S
Environmental conditions
Symbol	Parameter	Specification	Conditions etc.
T_ao	Operating temperature	-20°C to 50°C	Recommended range
T_as	Storage temperature	-20°C to 70°C
R_H	Relative humidity	Less than 95% RH
(O2)	Oxygen concentration	21% (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-11A-00 (revised on March 6, 2008)
Symbol	Parameter	Specification	Conditions etc.
R_S	Sensor resistance	0.2k? to 1.0 k?	at methane 3000 ppm
β	Sensitivity	0.48 to 0.68	Rs (at CH4 3000 ppm) Rs (at CH4 1000 ppm)
γ	Sensitivity	≥ 8.0	Rs (in air) Rs (at i-C4H10 1000 ppm)
?	Sensitivity	≥ 10.0	Rs (in air) Rs (at CH4 3000 ppm)
Standard Test Conditions:		Temp: 20°C ± 2°C Humidity:65% ± 5% (in clean air)	V_C : 5.0 V ± 1% V_H : 0.9 V ± 1% R_L : 750 ? ± 5%
Standard Test Conditions:		Pre-heating time: more than 48 hours
Mechanical characteristics
Items	Conditions		Specifications
Vibration	Frequency: Vertical amplitude: Duration:	100 cpm 4 mm 1 hour	Should satisfy the specifications shown in the sensitivity characteristics.
Shock	Acceleration: Number of impacts:	100 G 5 times