Picoturn Turbocharger Speed Sensor

PicoTurn Rotational Speed Sensor

Industry Leader & World Supplier of PicoTurn Systems

PicoTurn systems are used to measure turbocharger rotational speed with high accuracy. PMT has been the Sales and Technical support channel for PicoTurn products for over 20 years. We are the ONLY TECHNOLOGY CENTER with the ability to calibrate turbocharger rotational speed sensor signal conditioning boxes.

PicoTurn is a test system for measuring turbocharger rotational speed using the eddy current reduction technique. This technique directly senses each vane of the turbocharger wheel with a speed sensor that is mounted in a hole bored into the turbocharger housing. PicoTurn measures rotational speeds to 400,000 rpm, requires no modification of rotating parts, and senses the compressor wheel directly. It is compatible with single and two-stage turbocharger systems.

PicoTurn turbo speed sensor offers IP67 compliant sensors, standard digital TTL and CMOS output signals, compact housing, and a programmable number of vanes. The system has open architecture and works well stand alone or fits easily into another measurement system. PicoTurn rotational speed sensor is ideal for engine testing in passenger cars and commercial vehicles, as well as other applications that require high precision rotational measurement.

Rotational Speed Sensor Technology Features

The PicoTurn integrated circuits are realized without any analog component. Again, ScioSense (previously Acam) uses its TDC technology to set new standards in circuit design and takes the advantages of this principle like:

  • Measuring principle: Attenuation by eddy currents
  • Sensing directly the compressor wheel
  • Fully integrated sensor electronics
  • Self-adjustment simplifies mounting
  • Comfortable spacing sensor-wheel
  • Suitable even for small compressor wheels (32mm)
  • No modification of rotating parts
  • Rotational speeds up to 400.000 rpm
  • Optional signal conditioning with PT2G-BX, PT2G-BD
  • Analog output (0.5 – 4.5 V)
  • Digital output (TTL, 50% duty cycle)
  • Number of vanes programmable (1-31)
  • Compact housing (105 x 30 x 85mm³)

Applications

  • Turbocharger speed sensing and measurement
  • Engine test cells
  • Test car instrumentation
  • Gear speed
  • Vane speed for various wheels and materials

PICOTURN – Rotational Speed Sensing

Additional Information

Documentation & Downloads

Picoturn Measuring Principle

Rotational Speed Sensor for Turbochargers

The sensor is made of a simple coil with a ferrite core. Together with a resistor this forms an R-L network, the time constant of which is measured by a TDC. Placing a vane of the compressor wheel in front of the coil will change the time constant of the R-L network by the appearance of eddy currents. A DSP-unit following the TDC measurement unit processes the time data and calculates the rotational speed.

The time measurement is done with very high precision. The resolution is about 125 ps. The time constant of the R-L network can be very small, allowing high sampling rates in the range of 1 to 3 million samples per second.

The effect of eddy current damping is best for paramagnetic materials. This method therefore is very good for detecting aluminum wheels.

The maximum distance of the sensor from the wheel depends on the shape of the vanes. It varies from 0.8 mm (32 mm wheels) to 1.6 mm than 1 mm (90 mm wheels). Thanks to the ratio measurement any trimming of the coils is not necessary. The length of the cable between sensor and circuit may be up to several meters. This allows to separate the electronics part from the sensing part, reducing thermal and vibrational influences on the electronics.

The special kind of measurement reduces the influence of changes in the dielectric constant (e.g. by dirt) to a minimum.

Ordering Numbers

PT2G (Second Generation):
Product(Sensors)

PT2G-SM5.3

Description

Intelligent sensor with integrated signal processing and TTL output, sensor length 60 mm / 54 mm thread, 230°C

Part No

MNR 1537

Product(Sensors)

PT2G-SM5.5

Description

Intelligent sensor with integrated signal processing and TTL output, sensor length 46 / 40 mm tread, 230°C

Part No

MNR 1591

Product(Sensors)

PT2G-SM5.6

Description

Intelligent sensor with integrated signal processing and TTL output, sensor lenght 75 / 69 mm tread, 230°C

Part No

MNR 1660

Product(Sensors)

PT2G-SM5F.2

Description

Intelligent sensor with integrated signal processing and TTL output, sensor lenght 75 / 69 mm fine read, 230°C

Part No

MNR 1590

Product(Sensors)

PT2G-SM5F.3

Description

Intelligent sensor with integrated signal processing and TTL output, sensor length 56 / 40 mm fine thread, 230°C

Part No

MNR 1538

Product(Sensors)

PT2G-SM5F.5

Description

Intelligent sensor with integrated signal processing and TTL output, sensor length 76 / 60 mm fine thread, 230°C

Part No

MNR 1666

Product(Accessories)

PT2G-BX

Description

Signal conditioning box with RS232 interface

Part No

MNR 1526

Product(Accessories)

PT2G-BD

Description

Signal conditioning box with display

Part No

MNR 1527

Product(Accessories)

PT2G-XS-01.5

Description

Adapter cable, interconnecting PT2G-SM…sensor and PT2G-B…signal conditioning box, 1,5 m lenght

Part No

MNR 1771

Product(Accessories)

PT2G-XS-03

Description

Cable connecting sensor and signal conditioning box, 3 m length

Part No

MNR 1569

Product(Accessories)

PT2G-XS-05

Description

Cable connecting sensor and signal conditioning box, 5 m length

Part No

MNR 1539

Product(Accessories)

PT2G-XS-10

Description

Cable connecting sensor and signal conditioning box, 10 m length

Part No

MNR 1540

Product(Accessories)

PT2G-C-2U

Description

Power supply cable , open end, 2 m length

Part No

MNR 1542

Product(Accessories)

PT2G-C-2B&2BNC

Description

Combination cable for power supply and signals(2 x BNC, 2 X “banana” 4 mm), lenght 3 m / 3.6 m

Part No

MNR 1659

Product(Accessories)

PT2G-X-CT

Description

Cable, interconnecting PT2G-B…box and PICOTRUN-CT calibration device

Part No

MNR 1543

Product(Accessories)

PT2G-CCT

Description

Cable connecting PT2G-BD to PICOTURN-CT calibration device

Part No

MNR 1767

Product(Accessories)

PT2G-C-CSM2M

Description

Cable, connecting one PT2G sensor to a “CNTMM” counter minimodule by GSM GmbH, lenght 2m (also available in 10m)

Part No

MNR 1963

Product(Accessories)

PT2G-C-ETAS_E441

Description

Cable connecting two sensors PT2G to one “E441” module by ETAS GmbH, lenght: 2m

Part No

MNR 1984

Product(Accessories)

PT2G-C-IPTRKLM

Description

Cable. connecting one PT2G sensor to an IPETRONIK “SIM_CNT” or “-FRQ” counter module

Part No

MNR 1667

PICOTURN-BM/SM (First Generation)
Product(Controller Unit)

PICOTURN-BM V6

Description

Controller with BNC output connectors for 8 to 30 V power supply

Part No

MNR 1242

Product(Sensors)

PICOTURN-SM5.1

Description

Sensor M5, L=60 mm, 1.5 m cable length, for temperatures up to 180°C

Part No

MNR 586

Product(Sensors)

PICOTURN-SM5.2 (*)

Description

Sensor M5 L=60 mm, with reduced head diameter (3.6 mm), 1.5 m cable length, 180°C

Part No

MNR 607

Product(Sensors)

PICOTURN-SM5.3

Description

Like SM5.1 but for high temperatures up to 230°C

Part No

MNR 933

Product(Sensors)

PICOTURN-SM5.5 (*)

Description

Sensor M5 L=46 mm, 1.5 m cable length, 230°C

Part No

MNR 998

Product(Sensors)

PICOTURN-SM5.5L (*)

Description

Sensor M5 L=46 mm, 2.0 m cable length, 230°C

Part No

MNR 1108

Product(Sensors)

PICOTURN-SM5.6 (*)

Description

Sensor M5 L=75 mm, 1.5 m cable length, 230°C

Part No

MNR 1059

Product(Sensors)

PICOTURN-SM5.7 (*)

Description

Sensort M5 L=45 mm, with reduced head diameter (3.6 mm), 1.5 m cable length, 180°C

Part No

MNR 1065

Product(Sensors)

PICOTURN-SM5F.2

Description

Sensor M5 fine thread for high temperature range up to 230°C, L=41 mm, 1.5m cable length

Part No

MNR 934

Product(Sensors)

PICOTURN-SM5F.3 (*)

Description

Sensor M5 fine thread for high temperatures up to 230°C, L=56 mm, 1.5 m cable length

Part No

MNR 1081

Product(Sensors)

PICOTURN-SM5F.3L (*)

Description

Sensor M5 fine thread for high temperatures up to 230°C, L=56 mm, 2.0 m cable length

Part No

MNR 1109

Product(Accessories)

PICOTURN-CT

Description

Calibration Device for PICOTURN-BM controllers

Part No

MNR 890

Product(Accessories)

PT2G-C-2B

Description

Power supply cable, 4 mm “banana” connectors, 2 m lenght

Part No

MNR 1541

Product(Accessories)

Extension cable

Description

1.5 m SMB-SMB, for sensors

Part No

MNR 594

Product(Accessories)

Extension cable (**)

Description

2.5 m SMB-SMB, for sensors

Part No

MNR 707

Product(Accessories)

Clamping nut

Description

for M5 fine thread sensors -SM5F.x

Part No

MNR 696

Ordering Numbers

PT2G (Second Generation):
Product(Sensors)

PT2G-SM5.3

Description

Intelligent sensor with integrated signal processing and TTL output, sensor length 60 mm / 54 mm thread, 230°C

Part No

MNR 1537

Product(Sensors)

PT2G-SM5.5

Description

Intelligent sensor with integrated signal processing and TTL output, sensor length 46 / 40 mm tread, 230°C

Part No

MNR 1591

Product(Sensors)

PT2G-SM5.6

Description

Intelligent sensor with integrated signal processing and TTL output, sensor lenght 75 / 69 mm tread, 230°C

Part No

MNR 1660

Product(Sensors)

PT2G-SM5F.2

Description

Intelligent sensor with integrated signal processing and TTL output, sensor lenght 75 / 69 mm fine read, 230°C

Part No

MNR 1590

Product(Sensors)

PT2G-SM5F.3

Description

Intelligent sensor with integrated signal processing and TTL output, sensor length 56 / 40 mm fine thread, 230°C

Part No

MNR 1538

Product(Sensors)

PT2G-SM5F.5

Description

Intelligent sensor with integrated signal processing and TTL output, sensor length 76 / 60 mm fine thread, 230°C

Part No

MNR 1666

Product(Accessories)

PT2G-BX

Description

Signal conditioning box with RS232 interface

Part No

MNR 1526

Product(Accessories)

PT2G-BD

Description

Signal conditioning box with display

Part No

MNR 1527

Product(Accessories)

PT2G-XS-01.5

Description

Adapter cable, interconnecting PT2G-SM…sensor and PT2G-B…signal conditioning box, 1,5 m lenght

Part No

MNR 1771

Product(Accessories)

PT2G-XS-03

Description

Cable connecting sensor and signal conditioning box, 3 m length

Part No

MNR 1569

Product(Accessories)

PT2G-XS-05

Description

Cable connecting sensor and signal conditioning box, 5 m length

Part No

MNR 1539

Product(Accessories)

PT2G-XS-10

Description

Cable connecting sensor and signal conditioning box, 10 m length

Part No

MNR 1540

Product(Accessories)

PT2G-C-2B

Description

Power supply cable, 4 mm “banana” connectors, 2 m lenght

Part No

MNR 1541

Product(Accessories)

PT2G-C-2U

Description

Power supply cable , open end, 2 m length

Part No

MNR 1542

Product(Accessories)

PT2G-C-2B&2BNC

Description

Combination cable for power supply and signals(2 x BNC, 2 X “banana” 4 mm), lenght 3 m / 3.6 m

Part No

MNR 1659

Product(Accessories)

PT2G-X-CT

Description

Cable, interconnecting PT2G-B…box and PICOTRUN-CT calibration device

Part No

MNR 1543

Product(Accessories)

PT2G-CCT

Description

Cable connecting PT2G-BD to PICOTURN-CT calibration device

Part No

MNR 1767

Product(Accessories)

PT2G-C-CSM2M

Description

Cable, connecting one PT2G sensor to a “CNTMM” counter minimodule by GSM GmbH, lenght 2m (also available in 10m)

Part No

MNR 1963

Product(Accessories)

PT2G-C-ETAS_E441

Description

Cable connecting two sensors PT2G to one “E441” module by ETAS GmbH, lenght: 2m

Part No

MNR 1984

Product(Accessories)

PT2G-C-IPTRKLM

Description

Cable. connecting one PT2G sensor to an IPETRONIK “SIM_CNT” or “-FRQ” counter module

Part No

MNR 1667

PICOTURN-BM/SM (First Generation)
Product(Controller Unit)

PICOTURN-BM V6

Description

Controller with BNC output connectors for 8 to 30 V power supply

Part No

MNR 1242

Product(Sensors)

PICOTURN-SM5.1

Description

Sensor M5, L=60 mm, 1.5 m cable length, for temperatures up to 180°C

Part No

MNR 586

Product(Sensors)

PICOTURN-SM5.2 (*)

Description

Sensor M5 L=60 mm, with reduced head diameter (3.6 mm), 1.5 m cable length, 180°C

Part No

MNR 607

Product(Sensors)

PICOTURN-SM5.3

Description

Like SM5.1 but for high temperatures up to 230°C

Part No

MNR 933

Product(Sensors)

PICOTURN-SM5.5 (*)

Description

Sensor M5 L=46 mm, 1.5 m cable length, 230°C

Part No

MNR 998

Product(Sensors)

PICOTURN-SM5.5L (*)

Description

Sensor M5 L=46 mm, 2.0 m cable length, 230°C

Part No

MNR 1108

Product(Sensors)

PICOTURN-SM5.6 (*)

Description

Sensor M5 L=75 mm, 1.5 m cable length, 230°C

Part No

MNR 1059

Product(Sensors)

PICOTURN-SM5.7 (*)

Description

Sensort M5 L=45 mm, with reduced head diameter (3.6 mm), 1.5 m cable length, 180°C

Part No

MNR 1065

Product(Sensors)

PICOTURN-SM5F.2

Description

Sensor M5 fine thread for high temperature range up to 230°C, L=41 mm, 1.5m cable length

Part No

MNR 934

Product(Sensors)

PICOTURN-SM5F.3 (*)

Description

Sensor M5 fine thread for high temperatures up to 230°C, L=56 mm, 1.5 m cable length

Part No

MNR 1081

Product(Sensors)

PICOTURN-SM5F.3L (*)

Description

Sensor M5 fine thread for high temperatures up to 230°C, L=56 mm, 2.0 m cable length

Part No

MNR 1109

Product(Accessories)

PICOTURN-CT

Description

Calibration Device for PICOTURN-BM controllers

Part No

MNR 890

Product(Accessories)

PT2G-C-2B

Description

Power supply cable, 4 mm “banana” connectors, 2 m lenght

Part No

MNR 1541

Product(Accessories)

Extension cable

Description

1.5 m SMB-SMB, for sensors

Part No

MNR 594

Product(Accessories)

Extension cable (**)

Description

2.5 m SMB-SMB, for sensors

Part No

MNR 707

Product(Accessories)

Clamping nut

Description

for M5 fine thread sensors -SM5F.x

Part No

MNR 696

PICOTURN-SM5.1, -SM5.3

precision-measurement-picoturn-orno-sm51-sm53

PICOTURN-SM5.7

precision-measurement-picoturn-orno-sm57

PICOTURN-SM5.2

precision-measurement-picoturn-orno-sm52

PICOSTRAIN-SM5F.2

precision-measurement-picoturn-orno-sm5f2

PICOTURN-SM5.5

precision-measurement-picoturn-orno-sm55

PICOTURN-SM5F.3

precision-measurement-picoturn-orno-sm5f3

PICOTURN-SM5.6

precision-measurement-picoturn-orno-sm56