
( Brand: Hamamatsu ), ( Model: R647-25 ), ( Part Type: Laser )
The Hamamatsu Photomultiplier Tube R647-25 is a versatile and high-performance photon detection device, meticulously engineered by Hamamatsu Corporation for a wide range of scientific applications. This photomultiplier tube (PMT) offers exceptional sensitivity, making it an ideal choice for low-light-level detection in various fields such as astronomy, medical imaging, and particle physics.
The R647-25 PMT features a photocathode with a peak quantum efficiency of approximately 22% at 420 nm, ensuring efficient conversion of photons into electrical signals. Its large active area of 54 mm provides ample coverage for a broad range of light sources, enhancing its overall detection efficiency.
The R647-25 PMT employs a high-gain photomultiplier stage consisting of nine dynodes, resulting in a typical output pulse of 2-10 pC. This high output pulse enables easy amplification and fast signal processing, ensuring swift response times even in demanding applications.
Hamamatsu's proprietary technology ensures that the R647-25 PMT offers excellent stability and reliability, with a long-term operating lifetime of over 10,000 hours. Its robust construction, combined with a compact and lightweight design, makes it suitable for both benchtop and field deployments.
In summary, the Hamamatsu Photomultiplier Tube R647-25 is an exceptional photon detection solution for researchers and scientists in search of high-performance, versatile, and reliable photon counting equipment. Its advanced features, exceptional sensitivity, and long-term reliability make it a valuable asset in a variety of scientific applications.
The Hamamatsu R647 photodiode (model R647-25) is a popular choice in various optical detection applications due to its high sensitivity and large active area. Here are the pros and cons of buying this photodiode, followed by a conclusion and recommendation.
Pros:1. High Sensitivity: The R647-25 photodiode offers a high quantum efficiency of up to 85% in the visible range, making it an excellent choice for applications that require high sensitivity to light.
2. Large Active Area: With a 2.5mm active diameter, the R647-25 can easily handle high power densities, making it suitable for applications with high-intensity light sources.
3. Low Dark Current: Compared to other photodiodes in its class, the R647-25 has a relatively low dark current, which helps reduce noise in low light conditions.
4. Robust Construction: Hamamatsu photodiodes are known for their durable construction, ensuring longevity and reliability in various harsh environments.
Cons:1. High Cost: The R647-25 is a premium photodiode and may be more expensive than other options in the market.
2. Requires External Circuitry: Due to its high sensitivity, the R647-25 requires external circuitry for proper operation, which could add to the overall cost and complexity of the system.
3. Limited Wavelength Sensitivity: While the R647-25 has high sensitivity in the visible range, its response decreases significantly beyond 650nm, which may not be suitable for near-infrared applications.
Conclusion:The Hamamatsu R647-25 photodiode is an excellent choice for applications that require high sensitivity to visible light and can handle high power densities. Its large active area and low dark current make it a reliable option for various optical detection applications. However, its high cost and the need for external circuitry may be a deterrent for some users. If budget is a concern, consider less expensive alternatives with similar specifications. If cost is not a concern and the application requires high sensitivity, the R647-25 is a recommended choice.
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