英国CITY二氧化硫传感器 4SREV.2气体检测模块

4S Rev. 2 CiTiceL

4S Rev. 2 CiTiceL®

Sulfur Dioxide (SO2) Gas Sensor

Part Number: 2112B2015R

Patent : US7794779

Key Features & Benefits:

MEASUREMENT

Operating Principle 3-electrode electrochemical Measurement Range0-20 ppm SO2Maximum Overload150 ppm SO2

FilterTo remove H2S

Filter Capacity1000 ppm hrs @ 25 ppm H2S

Sensitivity 0.5 ± 0.1 µA/ppm

Response Time (T90)< 25 Seconds at 20OC

Baseline Offset (clean air)-0.2 to +0.5 ppm equivalent Zero Shift (+20°C to +40°C)< 0.1 ppm equivalent

Repeatability < ±2% of signal

LinearityLinear over measurement

range 0-20 ppm and within ±5%ELECTRICAL

Recommended Load Resistor10

Bias VoltageNot required

ResolutionDependent on electronics.

(0.1 ppm when using

recommended electronics)

Housing Material Noryl 110

Weight Approx. 4.5 gOrientationAny

ENVIRONMENTAL

Typical ApplicationsPortable life safety

Operating Temperature Range:

Continuous-20°C to +50°CIntermittent-40°C to +55°C

Industry leading reliability

Improved performance variability

Lifetime will be reduced if regularly exposed to extremes of temperature

Recommended Storage Temp0 - 20°C Operating Pressure Range1 atm ± 20%

Operating Humidity Range15% to 90%RH non-condensing.

Extended exposure to extreme humidity conditions will degrade sensor performance.

All dimensions in mm All tolerances ±0.15 mm unless otherwise stated

INTRINSIC SAFETY DATA

Maximum current at 150 ppm0.1 mA

Maximum o/c Voltage< 0.75 VMaximum s/c Current< 1.0 A

LIFETIME

Long Term Output Drift< 10% per annumExpected Operating Life2 years in clean air

Storage Life6 months in original packaging

Standard Warranty12 months from date of despatch

IMPORTANT NOTE: All performance data is based on conditions at 20°C, 50%RH and 1 atm, using City Technology recommended circuitry. For sensor performance data under other conditions, please contact City Technology Ltd.

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4S Rev. 2 CiTiceL

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4S Rev. 2 CiTiceL

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.

Whilst CiTiceLs are designed to be highly specific to the gas they are intended to measure, they will still respond to some degree to various gases. The table below is not exclusive and other gases not included in the table may still cause a sensor to react.

Gas

Carbon Monoxide Nitric OxideNitrogen DioxideHydrogen SulfideChlorineAmmonia

HydrogenHydrogen CyanideAcetyleneEthene

FormulaCONONO2H2SCl2NH3H2HCNC2H2C2H4

Concentration Used (ppm)

30050625520400101050

Reading (ppm SO2)

<10 - 5<-10<0.1<-20<1<5<30<45

Note: The figures in this table are typical values and should not be used as a basis for cross calibration. Cross sensitivities may not be linear and should not be scaled. All data based on a 5 minute gassing. For some cross interferents break through will occur if gas is applied for a longer time period.

The cross-sensitivity values quoted are based on tests conducted on a small number of sensors. They are intended to indicate sensor response to gases other than the target gas. Sensors may behave differently with changes in ambient conditions and any batch may show significant variation from the values quoted.

SAFETY NOTE

This sensor is designed to be used in safety critical applications. To ensure that the sensor and/or instrument in which it is used, are operating properly, it is a requirement that the function of the device is confirmed by exposure to target gas (bump check) before each use of the sensor and/or instrument. Failure to carry out such tests may jeopardize the safety of people and property.

Every effort has been made to ensure the accuracy of this document at the time of printing. In accordance with the company’s policy of continued product

improvement City Technology Limited reserves the right to make product changes without notice. No liability is accepted for any consequential losses, injury or damage resulting from the use of this document or from any omissions or errors herein. The data is given for guidance only. It does not constitute a specification or an offer for sale. The products are always subject to a programme of improvement and testing which may result in some changes in the characteristics

quoted. As the products may be used by the client in circumstances beyond the knowledge and control of City Technology Limited, we cannot give any warranty as to the relevance of these particulars to an application. It is the clients’ responsibility to carry out the necessary tests to determine the usefulness of the products and to ensure their safety of operation in a particular application.

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