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Electrochemical Sulfur Dioxide Gas Sensor (SO2 Sensor) - 7SH CiTiceL

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• Operating Principle: 3-electrode electrochemical
• Measurement Range: 0-20 ppm SO2
• Maximum Overload: 100 ppm SO2
• Filter: None
• Sensitivity: 1.25 ± 0.25 µA/ppm
• Response Time (T90): <15 Seconds
• Resolution: 0.1 ppm
• Repeatability: 2% of signal
• Linearity: Linear

Model Number: 7SH CiTiceL
Data Sheet:

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Product Specification

7SH CiTiceL Sulfur Dioxide Sensor (SO2 Sensor) Key Features & Benefits:
• Robust, industry standard 7-Series packaging
• Compact Size

7SH CiTiceL Sulfur Dioxide Sensor (SO2 Sensor) Technical Specifications

MEASUREMENT
Operating Principle	3-electrode electrochemical
Measurement Range	0-20 ppm SO2
Maximum Overload	100 ppm SO2
Filter	None
Sensitivity*	1.25 ± 0.25 µA/ppm
Response Time (T90)*	<15 Seconds
Baseline Offset (clean air)*	-0.1 to +0.2 ppm SO2 equivalent
Zero Shift (+20°C to +40°C)	< 0.1 ppm SO2 equivalent
Resolution	0.1 ppm (when used with recommended electronics)
Repeatability	2% of signal
Linearity	Linear

ELECTRICAL
Recommended Load Resistor	10 Ω
Bias Voltage	Not Required

MECHANICAL
Weight	17 g
Housing Material:
Cap	Polycarbonate
Body	ABS
Orientation	Any

ENVIRONMENTAL
Operating Temperature Range	-20°C to +50°C
Recommended Storage Temp	0°C to 20°C
Operating Pressure Range	Atmospheric ± 10%
Operating Humidity Range	15 - 90% RH non-condensing

LIFETIME
Long Term Sensitivity Drift	<2% signal loss/month
Expected Operating Life	Two years in air
Storage Life	6 months in CTL container

* Specifications are valid at 20°C, 50% RH and 1013 mBar, using City Technology recommended circuitry. Performance characteristics outline the performance of sensors supplied within the first 3 months. Output signal can drift below the lower limit over time.

Poisoning
CiTiceLs are designed for operation in a wide range of environments and harsh conditions. However, it is important that exposure to high concentrations of solvent vapours is avoided, both during storage, fitting into instruments and operation.

When using sensors with printed circuit boards (PCBs), degreasing agents should be used before the sensor is fitted. Do not glue directly on or near the CiTiceL as the solvent may cause crazing of the plastic.

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