We would be happy to talk to you about your application.
Our Leak Detection unit is shipping and in use world-wide.
Please visit our website at www.h2scan.com.
If you have specific questions I would be happy to answer them.
The answer to your question depends on your parameters, chiefly:
1) Range of detection
2) Accuracy desired
3) Price/Volume
H2scan has units that are only sensitive to hydrogen if that's important to you.