The L25D19 is a precision-engineered 25 mm (1”) diameter end window photomultiplier, renowned for its blue-green sensitivity thanks to its advanced bialkali photocathode. This photomultiplier is equipped with 8 linear focused type dynodes, making it an exceptional choice for applications requiring high sensitivity and precision. Its robust design ensures reliable performance across a variety of demanding environments.

Constructed with hard glass, the L25D19 offers a spectral range from 290 nm to 630 nm, which is ideal for detecting a wide spectrum of light. The photomultiplier’s refractive index is precisely measured at 1.49, ensuring minimal light loss and optimal performance. This model is particularly noted for its scintillation counting capabilities, fast time response, and excellent pulse height resolution, making it a valuable tool in scientific and industrial applications.

The L25D19 also features a standard voltage divider configuration, which includes a well-distributed voltage across its dynodes to maintain consistent performance and longevity. The design of this photomultiplier is focused on maximizing efficiency while minimizing noise, ensuring that every photon is accurately detected and measured. With these attributes, the L25D19 stands out as a reliable component in any photodetection system.