Contact us
Contact us for more information 
Please fill out the form below and we will come back to you by email with more information on this product. If you have any questions or comments to PCH Engineering A/S, please do not hesitate to contact usBy using this form you agree with the storage and handling of your data by this website.


Product type, what can we do for you?




Please contact me
Please fill in the form and our local distributor will contact you as soon as possibl. By using this form you agree with the storage and handling of your data by this website.


Product type, what can we do for you?




Technical information
Text technical information...


Product type, what can we do for you?





PCH 1026 Digital Structural Vibration Monitor

  • Low frequency monitoring from 0.05 Hz
  • 4 input channels (internal/external)
  • 4 raw outputs (12 conditioning bands)
  • GL-certified Safety Shock Detection (SSD) relay
  • Tower Frequency Detection (real-time FFT analysis)
  • Supports fieldbus communication protocols
  • Built-in self-test and diagnostics (PL-d, SIL 2)
  • Wide range of customisation options


Digital, low-frequency safety and control system

PCH 1026 is a highly configurable, digital monitor with a built-in accelerometer. It is designed for low frequency, structural vibration monitoring applications in wind turbines.

PCH 1026 provides far more precise electronic monitoring of the wind turbine than mechanical and electronic detectors. This reduces the turbine downtime and results in a more economical power production.


Designed with the wind industry for the wind industry

The PCH 1026 structural vibration monitor is designed in close collaboration with world-leading wind turbine manufacturers and is currently protecting more than 120,000 wind turbines worldwide.

The monitor is regularly being upgraded with new functionality based on customer feedback and needs.

a consultant



Main features

  • Sensors: 1 built-in 3-axis accelerometer + up to 4 external sensors
  • Frequency range: adjustable, 0.1-200 Hz or 0.1-1,000 Hz (2 bands only) 
  • Measuring range: adjustable 
  • Signal detection: RMS, Peak, Peak to Peak 
  • Measuring parameter: acceleration (m/s², mm/s², μm/s², g, mg, μg, Inch/s², mInch/s², μInch/s²), velocity (mm/s), displacement (m, mm, μm, Inch, Mils, μInch) 
  • Outputs: 4 4-20 mA outputs, 12 data channel outputs, 4 alarm relays, 1 GL2010 certified SSD card with independent output for safety loop 
  • Communication: USB, RS232, RS-485, CANbus, CANopen, ProfiBUS, ProfiNet, ProfiSAFE, EtherCat, Ethernet/TCP 
  • Compliance: SIL 2, PL-d, IP 54, ISO 13843, GL2003, GL2010




SSD – Safety Shock Detection (CHF 1133)

The monitor can be delivered with integrated Safety Shock Detection (SSD) functionality, certified by Germanischer Lloyd, which is more reliable than a mechanical switch.


TFD – Tower Frequency Detection (CHF 1116)

The Tower Frequency Detection (TFD) functionality detects cracks in cement towers or looseness in tower bases. The monitor will constantly monitor the resonance frequency of the tower, and any changes will trigger an alarm to alert the turbine controller.


Basic drive train monitoring (CHF 1115)

The PCH 1026 monitor offers FFT-analysis for condition monitoring of the drive train, including the turbine, main bearing, gearbox, and generator.


External vibration sensors

You can connect up to four external sensors in single or dual directions in addition to the PCH 1026 turbine monitor's built-in 3-axis accelerometer. This means that the monitor will fit your need for sensors today and can be expanded if you need more advanced monitoring in the future.


External single direction sensor, A (CHB 1102)

The CHB 1100-series is used with the PCH 1026 wind turbine and structural vibration monitor for advanced nacelle monitoring.

Examples are monitoring of low frequency torsional vibrations between the gear box output and the generator.

Furthermore, the CHB accelerometer is suitable for basic gear mesh monitoring of the gear box up to 1000 Hz.

  • Sensor type: Capacitive accelerometer
  • Frequency range: 0.1–200 Hz (-1dB)
  • Directions: One direction, axial
  • Signal detection: Peak
  • Sensitivity: 300 mV/g = 30.6 mV/m/s²
  • Measuring parameter: Acceleration (m/s²)


External dual direction sensor, A & B (CHB 1101)

The external dual direction accelerometer is used for advanced nacelle monitoring with distributed pick-up points.

A separate cable with integrated D-Sub and M12 connector makes installation and connection to the vibration monitor very easy.

  • Sensor type: Capacitive accelerometer
  • Frequency range: 0.1–100 Hz (-1dB)
  • Directions: Perpendicular directions X, Y
  • Signal detection: Peak
  • Sensitivity: 300 mV/g = 30.6 mV/m/s²
  • Measuring parameter: Acceleration (m/s²)




PCH 1026 is a structural vibration monitor for very low frequency vibration monitoring applications such as:




PCH 1026 is a self-contained monitor in a sealed, rugged casing. To function, only a DC power supply and desired output connections are required.


Highly adaptable digital platform

The design of PCH 1026 is based on a digital platform adaptable to multiple customer solutions. Configurations and settings are changed quickly and easily through a PC user software, even in the field.

The PCH 1026 monitor offers three internal sensors (accelerometers) allowing for measurements in three directions (X, Y and Z), each with independent conditioning channels available.

The filter techniques used in the conditioning channels are based on experience from a vast amount of wind turbine applications. If necessary, two or three conditioning channels can be assigned to just one sensor, i.e., one direction, if signals of different frequencies have the strongest appearance in the same direction.


Easy OEM and personnel access

PCH 1026 can be accessed by OEM's and authorized personnel through the complementary PCH Vibration Studio software, which makes the setup and configuration of the monitor easy. The configuration is carried out through the RS232/USB service port.


Built-in self-test and diagnostics

The PCH 1026 comprises a test function which can be used to test both the internal sensors (accelerometers) as well as the outputs of the monitor.

It reports to any connected controller by means of the System Failure relay and the serial port.

Details concerning the cause of the System Failure can be found using the comprehensive information list in the complementary PCH Vibration Studio software.

The PCH 1026 has a test pin for PLC controlled self-test.

The unit also features several external diodes for easy verification of unit-, alarm-, and communication status.




Sensor options

In addition to the three internal sensors, the PCH 1026 can be connected to up to four directional external sensors such as the CHB 1102/17 and the CHB 1101.

This allows you to monitor tasks such as differential nacelle vibrations, torsional vibrations from the output shaft of the gearbox, and many other tasks requiring multiple pick-up locations in the wind turbine.

Filter range options

The PCH 1026 turbine monitor has 12 simultaneous conditioning bands with high and low band filters. The filter ranges can be customised.


Input / output options

The PCH 1026 is highly configurable with more than 200 combinations, and its input and output options include:
  • internal 3-axis accelerometer
  • up to 4 external sensors
  • up to 4 independent industrial 4-20 mA outputs
  • up to 4 independent alarm relays
  • 1 System Failure relay
  • 12 data channel outputs
  • 1 optional GL2010 certified SSD card (high-power/low power) with an independent output for a safety loop
  • setting up and accessing data from internal Zoom FFT on up to 2 channels
  • industrial communication protocol support: USB, RS232, RS-485, CANbus, CANopen, InterBUS, ProfiBUS, ProfiNet, ProfiSAFE, DeviceNET, EtherCat, Ethernet/TCP etc.


Alarm limits and delay times

The alarm relays of the turbine monitor can be individually configured.




The PCH 1026 is certified according to Germanischer Lloyd GL2010 guidelines and ISO13849-1 as a PL-d safety component.

It is SIL 2 and PL-d compliant and has an IP 54 rating.


See the product data sheet for further details.






a consultant

Copyright © PCH Engineering A/S - All Rights Reserved. Content Management System.