Rototherm expands with acquisition of Mainstream Measurements

The acquisition, the value of which has not been disclosed, marks a strategic step in expanding Rototherm’s product range and technical expertise.

Port Talbot headquartered manufacturer of measurement and control instrumentation, Rototherm has expanded via acquisition.

It has acquired Yorkshire-based Mainstream Measurements a supplier of specialist measurement solution using ultrasonic sensors to gauge how water flows in places like pipes, rivers, and drainage systems. The acquisition, the value of which has not been disclosed, marks a strategic step in expanding Rototherm’s product range and technical expertise.

Mainstream Measurements has built a strong reputation providing solutions across a range of industrial measurement applications. By joining the Rototherm group, Mainstream Measurements will benefit from increased manufacturing capability, broader distribution, and long-term investment in product development.

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Tarkan Conger,director of Rototherm, said:“We are delighted to welcome Mainstream Measurements into the Rototherm group. The company’s technical knowledge, strong customer relationships, and complementary product portfolio make this an excellent strategic fit. This acquisition allows us to broaden our offering while continuing to deliver the high standards our customers expect.

“This is a highly complementary acquisition strengthening our ultrasonic flow division, which last year grew 35%, ultrasonics will now account to around 50% of our revenue. We are also expecting good growth in 2026 in our defence business which is going from strength to strength.”

Bev Bruce, Director of Mainstream Measurements , added: “This is an exciting step forward for Mainstream Measurements. Rototherm shares our values and our focus on quality and service, which made this a great fit. Our customers can expect the same personal service they’re used to, backed by the additional strength and resources of a larger group.”

Mainstream Measurements will continue to operate under its existing name.