KKR-backed Spectris Group has acquired Sentech, a Pennsylvania and North Carolina-based sensor business, from Astor Place Holdings. No financial terms were disclosed.

Based in London, Spectris is a supplier of high-tech precision instrumentation, test equipment, and software for industrial applications. Sentech will join Hottinger Brüel & Kjær, which is part of Spectris HBK. HBK, which has offices in Denmark, Germany and the UK, is a provider of test and measurement solutions.

This is Spectris' first acquisition since it became a KKR portfolio company. The deal is expected to close later this year. Harris Williams served as exclusive financial advisor to Sentech.