The Pioneer of Modern Leak Testing

Uson Releases the 628 – Differential Pressure Decay Non-Destructive Leak Tester

New tester simplifies operation and increases production efficiency

Houston, TX, USA – Uson announces the worldwide launch of the a new industrial-grade 628, accurate differential pressure decay leak tester at a competitive price.

“Customers are often faced with a challenge to inspect components at multiple stages of the assembly process,” explains Chetan Desai, Director of Technology at Uson. “The 628 combines the proprietary differential pressure measurement technology in a compact industrial form factor to help customers identify product defects early in the fabrication or assembly process with high accuracy.”

The Uson 628 is a modern interpretation of the classic automatic leak tester that has been serving the automotive, industrial and medical device industries for many years. Available in a variety of pressure ranges from vacuum to 15 bar (225 psi) with up to 30 different programs that can be created and stored in the instrument’s memory for fast recall of test parameters.

The Uson 628 provides users on a tight budget with the precision and accuracy delivered by our industry leading differential pressure decay transducers. Some leak testing applications may not be complicated but nonetheless, they require reliable technology that will deliver accurate and repeatable results. This is the business in which the Uson 628 excels.

The Uson 628 is the next generation of differential leak tester that replaces the successful Qualitek 626. The 628 with its unique front panel indicators, easy to navigate menu system, large backlit screen, selectable language options, pressure unit selection, firmware updates and data transfer via USB makes the 628 an instrument destined for international acclaim.

Quality without compromise.

Contact Us


Uson L.P. - Corporate

8640 N. Eldridge Parkway
Houston, TX 77041 USA

Tel: +1-281-671-2000
Fax: +1-281-671-2001


Uson UK – Europe

Western Way
Bury St. Edmunds
Suffolk, IP33 3SP United Kingdom

Tel: +44-1284-760606
Fax: +44-1284-763049


Uson – China

Room 601, 567 Lan Gao Road
Shanghai, 200333, China

Main: 021-583 65859, 021-583 59187
Fax: 021-583 59185, 021-337 73559