The PDM03-9107-USB is an advanced plug-and-play photon counting module designed to deliver high sensitivity and low noise performance. It features a 29mm diameter photomultiplier, integrated with fast counting electronics and a low-power high voltage supply. This module is engineered for ease of use, requiring just a PC or laptop with a USB port for operation, making it highly versatile for various applications. The counting electronics include an amplifier/discriminator with an adjustable threshold and a multi-channel scaler/counter timer, enabling precise data recording and storage based on time. 

With three software-configurable counting modes, users can choose between pre-set number of channels, pre-set total measurement period, or continuous operation, all managed via dedicated application software. The PDM03-9107-USB boasts a spectral range of 280-630nm, offering flexibility for different detection needs. For those requiring extended UV sensitivity, the PDM03-9107Q-USB variant extends the range down to 160nm. The module's effective photosensitive diameter of 25mm, paired with a typical dark count rate of 100cps at 20°C, provides a unique detection capability, making it ideal for low-light conditions.

Designed with a positive-polarity high-voltage supply, the PDM03-9107-USB ensures maximum count-rate stability even at very low light levels. Its mumetal rectangular housing offers excellent protection against external magnetic fields, enhancing its reliability in various environments. This module is particularly suited for applications requiring photon-counting mode light detection, such as time-resolved fluorescence and luminescence studies. Its robust design and user-friendly interface make it an indispensable tool for scientific investigations that demand precise light detection down to single photons.