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Tin Dioxide Semiconductor Gas Sensor for CO and Methane - SB-95-12

? Target gas: Carbon Monoxide/Methane
? 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

Model Number: SB-95-12
Data Sheet:

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Product Specification

SB-95-12 Carbon Monoxide and Methane Sensor Description
The SB-95-12 is a tin dioxide semiconductor gas sensor which has an excellent performance in detecting both CO and methane selectively with single sensor element. This unique feature was realized by using a mini-bead type sensing element with a periodic temperature change operation method.

SB-95-12 Carbon Monoxide and Methane Sensor Application
? Home gas leak detector

SB-95-12 Carbon Monoxide and Methane Sensor Specifications

Standard Operating conditions
Symbol	Parameter	Specification	Conditions etc.
V_H (H)	Heater voltage (high)	0.9 V ± 5%	AC, DC or pulse
V_H (L)	Heater voltage (low)	0.2 V ± 5%	AC, DC or pulse
V_C	Circuit voltage	Less than 5 V	DC: Pin2 (+) - Pin 1 (-)
R_L	Load resistance	Variable (> 200 ?)	P_S < 10 mW
R_H	Heater resistance	2.8 ? ± 0.2 ?	at room temperature
T_H(H)	Heating time (high)	5 sec ± 0.1 sec
T_H (L)	Heating time (low)	20 sec ± 0.1 sec
I_S (H)	Current consumption (high)	132mA ± 15mA	V_H=0.9V
I_S(L)	Current consumption (low)	59mA ± 10mA	V_H=0.2V
P_S	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%
(O2)	Oxygen concentration	The sensitivity characteristics are influenced by the variation in oxygen concentration. Please consult FIS for details.
Sensitivity characteristics
Model	SB-30-00
Symbol	Parameter	Specification	Conditions etc.
R_S(L)	Sensor resistance at LOW period	4.5 k? - 40 k?	at 100ppm of CO
α_(L)(30-100)	Sensitivity slope (30 - 100 ppm)	0.35 to 0.65	log (R_S(30 ppm) / R_S(100 ppm)) log (30/100)
α_(L)(100-300)	Sensitivity slope at LOW period	0.5 to 1.0	log (R_S(300 ppm) / R_S(100 ppm)) log (300/100)
R_S(H)	Sensitivity resistance at HIGH period	0.2 k? - 2.3 k?	at 3000ppm of methane
β_(H)	Sensitivity slope at HIGH period	0.45 to 0.65	R_S(3000 ppm) / R_S(1000 ppm)
Standard Test Conditions:		Temp: 20°C ± 2°C Humidity: 65% ± 5% (in clean air)	V_C : 5.0 V ± 5% V_H(high) : 0.9 V ± 5% V_H (low) : 0.2 V ± 5% R_L(high) : 750? ± 1% R_L (low) : 10 k? ± 1%
Standard Test Conditions:		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