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Tin Dioxide Semiconductor Gas Sensor for Refrigerant Detection(HCFCs) - SP-41-00

? Target gas: HCFCs (R-22)
? Heater voltage: 5.0 V ± 4%
? Circuit voltage: 5.0 V ± 4%
? Operating temperature: -10°C to 60°C
? Storage temperature: -20°C to 70°C
? Relative humidity: Less than 95% RH
? Sensor resistance: 1 k? to 10 k?
? Industrial gas leak detector

Model Number: SP-41-00
Data Sheet:

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Product Specification

SP-41-00?Gas Sensor for Refrigerant Detection?Description
The SP-41 is a tin dioxide semiconductor gas sensor which has a high sensitivity to HCFCs (e.g. Freon: R-22) with reduced sensitivity to other gases such as alcohol.

SP-41-00?Gas Sensor for Refrigerant Detection?Application
? Industrial gas leak detector

SP-41-00?Gas Sensor for Refrigerant Detection?Specifications

Standard Operating conditions
Symbol	Parameter	Specification	Conditions etc.
V_H	Heater voltage	5.0 V ± 4 %	AC or DC
V_C	Circuit voltage	5.0 V ± 4 %	AC or DC
R_L	Load resistance	Variable	P_S?< 15 mW
R_H	Heater resistance	40 ? ± 2 ?	at room temperature
P_H	Heater power?consumption	400 mW?(Typical value)	P_H?= V_H²?/ R_H
P_S	Power?dissipation of sensing element	Less than?15 mW	P_S?=(V_C?- V_RL)²/R_S
Environmental conditions
Symbol	Parameter	Specification	Conditions etc.
Tao	Operating?temperature	-10°C to 60°C	Recommended range
Tas	Storage?temperature	-20°C to 70°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.
Sensitivity characteristics
Model	SP-41-00
Symbol	Parameter	Specification	Conditions?etc.
RS	Sensor resistance	1 k? to 10 k?	At 1000 ppm of R-22/air
β	Ratio of sensor?resistance	0.25 to 0.55	Rs at 3000 ppm?of R-22 Rs at?1000 ppm?of R-22
Standard Test Conditions:		Temp: 20°C ± 2°C Humidity:65% ± 5% (in clean air)	V_C_?: 10.0 V ± 1% ?? V_H?: 5.0 V ± 1% ? ? R_L?: 10.0 k? ± 5%
Standard Test Conditions:		Pre-heating time: more than?96 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