Most of analyser can’t be used for inline measurement due to the process condition 

Reliability/

Compatible with analyzer

Timely Fast response

Representative

Inexpensive

Safe

Reliable

The number one reason for analyzer breakdown and none availability is the sample system./分析仪故障和不好用的一个原因就是由于采样系统的问题

The systems engineer has to have an understanding of the process and the challenges associated with the measurement./系统工程师对于工艺要有很好的理解并对于所要测量的组份有全

There is no substitute for experience.

There may be more than one way to make a sample system.

Simple is best.

High quality correct materials components a must.

Compatible with analyzer

The sample system is required to condition the sample for the analyzer.

Pressure.

Temperature.

Particulates.

Phase.

Water and Unwanted Contaminants.

Materials of construction.

Timely Fast response

Process DCS and Advanced control schemes need reliable timely data.

Transport and conditioning lag times can add more than the analysis time.

Careful experienced design is required to reduce time lag to acceptable levels.

Representative

Any conditioning changes the composition of the sample.

Careful selection of elements in the sample system is required to ensure the sample analyzed is similar as far as possible to the process.

Inexpensive

Simple is best for analyzer Sample systems.

Total cost of ownership should be considered.

Safety

Temperature. Less than 70 deg C

Toxic. Avoid “measure something else”

Provide purges

Pressure relief valves.