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Demo Code for PHLib Programming Library for PicoHarp 300

PicoQuant GmbH - January 2015


The PicoHarp 300 is a TCSPC system with USB 2.0 interface. It requires a 686 class PC with USB 2.0 host controller, 1 GB of memory and at least 1 GHz CPU clock. The PicoHarp software is suitable for Windows XP, Vista, 7 and 8, including the x64 versions.


The Demo code relies on the PH300 DLL for which the manual is available here:

What's new in version (

  • a firmware fix to deal with occasional system errors

What's new in version

  • a firmware fix for lost counts at very short measurement times (all modes)
  • a firmware fix for T3 mode (data was corrupted at maximum binning)
  • simplified access to support information and the support web site
  • a new device driver meeting most recent signature requirements
  • official support of Windows 10 (but dropping support of Windows XP and Vista)

What's new in version

  • a bugfix to deal with firmware errors in some hardware devices
  • functionality and documentation remained unchanged.

What's new in version 3.0

  • a programmable time offset in the sync input to replace adjustable cable delays (4 ps resolution, ±100ns)
  • a programmable time offset in all router channels to tune for relative delay (4 ps resolution, ±8ns)
  • a programmable marker holdoff time to suppress marker glitches
  • acquisition offset now also applicable in T3 mode
  • a routine to obtain info on hardware features
  • a routine to obtain hardware debug information
  • a routine to disable/enable multistop
  • consistent return of success/error instead of data


Do not connect the PicoHarp device before installing the software.

Before installation, make sure to backup any work you kept in previous installation directories and uninstall any older versions of PHLib. The PHLib package can be distributed on CD/DVD or via download. The setup distribution file is setup.exe. If you received the package via download or email, it may be packed in a zip-file. Unzip that file and place the distribution setup file in a temporary disk folder. Start the installation by running setup.exe before connecting the PicoHarp device. On some versions of Windows you may need to log on as administrator.

The setup program will install the programming library including manual, and programming demos and the device driver for the PicoHarp. Dependent on the version of Windows you may be prompted to confirm the driver installation.

To uninstall the PHLib package, you may need to be logged on as administrator. Backup your measurement data before uninstalling. From the start menu select: PicoQuant - PH300-PHLib vx.x > uninstall. Alternatively you can use the Control Panel Wizard 'Add/Remove Programs' (in some Windows versions this Wizard is called 'Software')


PicoQuant GmbH disclaims all warranties with regard to this software and associated documentation including all implied warranties of merchantability and fitness. In no case shall PicoQuant GmbH be liable for any direct, indirect or consequential damages or any material or immaterial damages whatsoever resulting from loss of data, time or profits arising from use or performance of this software.

License and Copyright Notice

With this product, you have purchased a license to use the PicoHarp software. You have not purchased the software itself. The software is protected by copyright and intellectual property laws. You may not distribute the software to third parties or reverse engineer, decompile or disassemble the software or any part thereof. Copyright of this software including manuals belongs to PicoQuant GmbH. No parts of it may be reproduced or translated into other languages without written consent of PicoQuant GmbH.

Trademark Disclaimer

PicoHarp, HydraHarp TimeHarp and NanoHarp are registered trademarks of PicoQuant GmbH. Other products and corporate names appearing in the product manuals or in the online documentation may or may not be registered trademarks or copyrights of their respective owners. They are used only for identification or explanation and to the ownerís benefit, without intent to infringe.

Contact and Support

PicoQuant GmbH
Rudower Chaussee 29
12489 Berlin, Germany
Phone +49 30 6392 6929
Fax +49 30 6392 6561


PicoHarp 300 v3.x Demo Code






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