Prozone Engineers

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.

 

Mechanical installation

 

When installing the sensor, it must only be screwed in hand-tight and a gas tight seal ensured. Spanners and similar mechanical aids may not be used, as excessive force may damage the sensor thread.

 

Cross sensitivity table

 

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 other gases. The table below is not exclusive and other gases not included in the table may still cause a sensor to react.

 

The ao2 has been tested with a number of gases which may be present in automotive exhaust to establish their level of cross interference.

 

 

Technical specifications

Measurement

Operating principle partial pressure electrochemical

Measurement range 0-100% o2

Output* 9 – 13 mv in air

Response time (t90)* <5 s

Response time (t 99.5) <40 s

Baseline offset* <20 mv

Linearity linear 0-100% o2

Electrical

On board temperature <2% o2 equivalent

Compensation variation from 0°c to 40°c

External  load resitor 10 kw minimum

Connector 3 pin molex header (molex 22-29-2031)

Recommended mating part molex 3-way housing (molex 22-01-2035)

Molex crimp terminals (molex 08-45-0110)

Mechanical

Material 40 g (nominal)

Weight housing red abs

Orientation any

Environmental

Typical application vehicle exhaust analysis

Operating temperature range -20°c to +50°c

Operating pressure range 0.5 – 2.0 bar

Differential pressure range 0 to 500 mbar max

Operating humidity range 0 – 99% rh non-condensing

Lifetime

Long term ouput drift in 100% o2 <10% signal loss/year

Expected operating life 360,000% o2 hours at 20°c               286,000% o2 hours at 40°c                    or 2 years in air at stp.

Packaging sealed blister

Specifications are valid at 20°c, 50% rh and 1013 mbar, using city technology recommended circuitry. Performance characteristics outline the performance of sensors supplied.

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.