You can add any Positive or Dual (positive & negative pressure) channel on an existing OB1 chassis.

This added channel can either replace an existing channel, or be installed on a free slot.

The steps of an Elveflow Instrument Upgrade process

1- The User needs to fill & send back the spreadsheet file attached to send Elveflow the important information regarding this upgrade.
2- The User needs to fill & send back the contamination form so that Elveflow personel can process your device.
3- The User needs to send back these documents to Elveflow Support (
4- Elveflow will perform the upgrade of your instrument.
5- Elveflow will ship back the upgraded instrument to you.
6- The User needs to update the instrument in the ESI software to reflect the changes made in the instrument.

1. Sending Elveflow your requirements and your device to be upgraded.

The installation, tuning and testing of the new channel has to be performed by qualified Elveflow personel.

So to request such an upgrade, the first step is to send an email to, indicating your OB1 serial number (see on the back of your OB1), and detailing your current configuration, and the modification you would need. 

When your instrument will reach the Elveflow offices, an inspection will be performed, usually the same day or the day after.

The typical OB1 channel installation is a quick operation that will be followed by a performance test on a test rig, to ensure the upgraded OB1 meets Elveflow performance and quality standards.

The upgraded OB1 is then usually shipped back to the customer within a couple of days.

2. Refreshing your OB1 configuration in ESI, once your upgraded equipment is received.

Following the receipt of your modified instrument, it is important that the ESI software is aware of this configuration change.

Indeed you may have declared your OB1 as e.g. a 4x 200 mbar channel in the past, but you need ESI to reflect your upgraded OB1 configuration, e.g. 3x 200 mbar channel + 1x 2000 mbar channel.

If you do not refresh your device configuration in ESI, you won't be able to use your new configuration.

Detection is not automatic, and new channel installation need to be set in the software by the end user.

You can just delete your OB1, shutdown and restart ESI, then re-add the OB1 in the ESI software.

The steps required are below

1. Open the OB1 parameters 

2. Delete your current OB1 

3. Shutdown and restart ESI,

Your ESI initialization file will be updated.

4. Re-add your OB1 accordingly

Congratulations, you can now use your upgraded OB1 in ESI ;-)