PICOTURN PTCM

Compact Controller

Accurate Technologies Inc. (ATI) offers the PICOTURN PTCM rotational speed sensor for turbochargers. Compared to optical or magnetic sensing systems, the PICOTURN system is proven as a rugged, reliable, simple, accurate and cost effective solution. The system’s functional principle is a 1MHz pulse induction with eddy current discrimination, using a compressor mounted solenoid sensor that detects and counts compressor vanes individually, generating a standard TTL/CMOS output signal.

The PICOTURN PTCM consists of a sensor with a 1.5m cable, a compact, ruggedised signal-conditioning box, plus a lead for output and power supply. Both the sensor and PTCM box are rated as IP67 proof if connected and installed as per PICOTURN’s recommendations, making it ideal for underbonnet fitments. The PTCM is capable of compressor wheel speed measurement up to 400,000 rpm with a minimum operating speed of 200 rpm.

The PICOTURN system benefits from high sensitivity, allowing a large distance between sensor and the rotating vanes in the range of 1 mm at 0.6mm vane thickness. Various sensors are available to accommodate numerous user cases differentiated by the length and thread of the sensor head. The PTSM-H series benefits from enhanced sensitivity, enabling use with titanium wheel and other critical applications where higher temperatures are a priority.