The 9878B Photomultiplier is a state-of-the-art 29 mm (1.13") diameter device, designed to deliver exceptional performance in high-temperature environments. Featuring a high-temperature bialkali photocathode, this photomultiplier is engineered to operate efficiently at temperatures reaching up to 150°C. Its robust construction includes 11 BeCu dynodes configured in a box grid design, ensuring optimal electron multiplication and signal amplification.

The 9878B is crafted with a focus on durability and precision. Its tarnish-free gold-plated base pins enhance longevity and maintain excellent connectivity, even in challenging conditions. The photomultiplier's borosilicate window is designed to cover a spectral range of 280 nm to 630 nm, facilitating a wide array of applications where spectral sensitivity is crucial. With a refractive index of 1.49, this device ensures minimal light loss and maximum efficiency in capturing photons.

This photomultiplier's quantum efficiency peaks at 17%, with a luminous sensitivity of 50 µA/lm, making it a reliable choice for applications that require precise light measurement. The 9878B's design includes a nominal anode sensitivity of 20 A/lm and can reach up to 50 A/lm, supported by an overall voltage range of 1400 to 1600 V. Additionally, its magnetic field sensitivity and temperature coefficient are meticulously calibrated to ensure stable performance across varying conditions.

Weighing just 55 grams, the 9878B is lightweight yet robust, making it easy to integrate into various systems. This photomultiplier is an ideal choice for professionals seeking a reliable, high-performance solution for demanding applications. With its advanced features and durable construction, the 9878B is engineered to meet the needs of the most challenging environments, ensuring accurate and consistent results.