The Original System
for Turbocharger Speed Measurement
Accurate Technologies Inc. (ATI) offers the PICOTURN 1G 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. Maximum wheel speed measurement is 400,000 rpm, with a minimum operating speed of 390 rpm. The preferred turbo compressor wheel material is aluminum; titanium wheels require individual testing to verify compatibility with the PICOTURN sensor.
Standard PICOTURN-1G Sensors are passive sensors, exchangeable with an individual controller module. Use any 1G sensor with the PICOTURN-BM controller.

The PICOTURN system benefits from high sensitivity, allowing a large distance between sensor and the rotating vanes in the range of 1 at 0.6mm vane thickness. Various sensors are available to accommodate numerous user cases differentiated by the length and thread 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.
Sensor Tip Element Temperature | Standard sensor: –40°C to +250°C* H-type sensor: –40°C to +270°C* |
IP67 rating | Yes |
Sensor Body Dimensions | Fine thread M5x0.5, with various lengths 25mm to 60mm Standard thread M5x0.8, with various lengths 40mm to 70mm |
Extension cable | Max length 1.5 meters / 2.5 meters |
* Excess temperature tolerated for short periods |
Dimensions | 150 x 84 x 30 mm |
IP67 rating | No |
Number of Vanes | 1 to 15, 16 to 31 |
Digital Output | TTL/CMOS (One impulse per N vanes, N = 1 to 31) |
Analog Output | 0.5 to 4.5V |
Temperature | -40°C to +85°C |
Supply Voltage | 8 to 30 volts DC |
-40°C to +280°C Sensor Head Temperature Range; 1.5m Cable Length
-40°C to +250°C Sensor Head Temperature Range; 1.5m Cable Length
Name | Part Number | Description |
PTCM V1.0 | 220340001 | Signal conditioning box with standard interface |
PTCM V1.0L | 220390001 | Signal conditioning box with LEMO interface connector |
PICOTURN-BM V6.2 | 202300004 | Controller with BNC output connectors for 8-30V power supply |
PTCM-1.5-nc | 220320001 | System interface power cable, open ends, 1.5 m length |
PTCM-3.0-nc | 220320002 | System interface power cable, open ends, 3.0 m length |
PTCM-1.5-BNC | 220320003 | System interface power cable, BNC connectors for singals, banana jack connectors for power, 1.5 m length |
Extension Cable | 220120001 | SMB-SMB, for sensors; 1.5m length |
PTSM 5F.x Clamping nut | 220030002 | For fine thread sensors -SM5F.x |