R3991A-07

The R3991A-07 is a high-gain, side-on type PMT with a bialkali photocathode, designed for ultra-sensitive light detection in scientific and industrial applications. Its φ28mm metal package provides excellent photon counting capability and fast timing performance.

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Parameter	Specification
Photocathode Type	Bialkali (Sb-K-Cs)
Spectral Response	300–650 nm
Peak Wavelength	420 nm
Cathode QE (Typ.)	25% @ 420 nm
Anode Luminous Sensitivity	50 A/lm (Min. @ 1000V)
Gain	1×10⁷ (Typ. @ 1000V)
Rise Time	2.2 ns
Transit Time	24 ns (Cathode to Anode)
Dark Current	5 nA (Max. @ 1000V)
Supply Voltage	1000V (Max.)
Package	Metal (φ28 mm) with borosilicate glass window

Means of Payment

For your convenience, we accept multiple payment methods in USD, including PayPal, Credit Card, and wire transfer.

RFQ (Request for Quotations)

It is recommended to request for quotations to get the latest prices and inventories about the part.
Our sales will reply to your request by email within 24 hours.

IMPORTANT NOTICE

1. You’ll receive an order information email in your inbox. (Please remember to check the spam folder if you didn’t hear from us).
2. Since inventories and prices may fluctuate to some extent, the sales manager is going to reconfirm the order and let you know if there are any updates.

Shipping Method

Currently, our products are shipped through DHL, FedEx, SF, and UPS.

Delivery Time

Once the goods are shipped, estimated delivery time depends on the shipping methods you chose:

FedEx International, 5-7 business days.

The following are some common countries’ logistic time.