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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?

Model Number: SB-500-12
Data Sheet:

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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.
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
D_T (L)	Detection timing (low)	< 0.1 sec	before switching to LOW
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-500-12
Symbol	Parameter	Specification	Conditions?etc.
R_S	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 (R_S(30 ppm)?/ R_S(100 ppm)) log (30/100)
α_(100-300)	Sensitivity slope (100 -?300 ppm)	0.5 to 1.0	log?(R_S(300 ppm)?/ R_S(100 ppm)) log?(300/100)
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? ? ??????: 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