Quality Instruments, Spare Parts, Service & Support from your Gas Sampling Specialists at ASI
Experience and Expertise from Hundreds of Reconditioned and Repaired CEMS Dilution Probes

Fast and Consistent Turnaround Times for your Serviced Equipment

Did you know we also offer Full Service for your EPM Out-of-Stack (OOS) diluting sampler?

has the service knowledge of this system that remains unmatched. We have been involved with the service and rebuilds for numerous OOS systems over the years. Despite the fact that many of these systems are racking up the miles, we are doing our part to ensure that these instruments are running better than ever!

Full Service & Rebuilds

Pressure & Temperature Modifications

Several Upgrades Available

Many Spare Parts Available

EPM Out-of-Stack Diluter Seal Upgrade
To Eliminate Leakage and Sample Contamination


Occasionally we are asked to convert the "S" Series OOS back to the original configuration (using Kalrez® O-ring seal) to resolve these issues. Although this is indeed possible, the costs for modifications and the need for us to have the entire OOS Sampler at our shop to do the conversion makes this approach impractical and undesirable to the end user.

To resolve these issues, a very simple and low cost OOS upgrade has been implemented that has been well received and proven effective. In general, the upgrade consists of eliminating the 3/4" SS ferrule configuration and changing it to a 3/4" graphite ferrule configuration. The advantages to this upgrade are as follows:

Easy to tighten knurled nut
Leak-tight seal at junction of diluter tip and inner flange assembly
Operating temperature of up to 750°F (400°C) remains the same
Quick and easy ferrule change out during scheduled maintenance
Possibility of knurled nut cross-threading to inner flange assembly eliminated
Diluter section and knurled nut is all that we need to perform the upgrade
Minimal downtime when using one of our diluters while yours is out for upgrade

Scope of work:

Simply send us the diluter section and knurled nut from your OOS Sampler. Be sure to let us know if you will need a loaner unit while your equipment is out for upgrade.

We will remove the 3/4" Swagelok® nut and ferrules from the diluter tip, and inspect the diluter tip. The existing diluter tip can be reused if it is free of any major channels or deformation that had resulted from the stainless steel ferrule configuration. If the diluter tip cannot be reused, we will provide a quote for the tip replacement.

The diluter will then go through our standard cleanup service. This consists of external and internal aspirator cleaning cycle and aspirator performance testing (test certificate with performance data is provided).

The internal threads of the knurled nut will be removed. This will eliminate the possibility of cross-threading to the inner flange assembly. The threads of the knurled nut were originally intended to retain the piece onto the inner flange assembly during diluter removal, they serve no other purpose.

A new 3/4" SS nut (modified) will be supplied with the upgraded diluter, along with a package of 5ea. graphite ferrules.

Please contact us for more information or pricing, and refer to our service code "SRVC-PRB-B2". If your systems is down for scheduled maintenance, consider sending in the entire unit for a "Full Service" (reference our service code "SRVC-PRB-B").

Get a Service Quote ...

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Alpha Suite Inc.  2020