---
type: product
schema_version: 1
stock_number: "65359-3"
canonical_url: "https://www.artisantg.com/Scientific/65359-3/Hamamatsu-R645-Phototube"
json_url: "https://www.artisantg.com/Scientific/65359-3/Hamamatsu-R645-Phototube.json"
generated_at: "2026-11-07T02:06:22.536Z"
last_updated: "2026-05-27T19:05:39.947-05:00"
---

# Hamamatsu R645 Phototube

_Summary and Categories are this item's record. The description sections and FAQ are machine-assisted and can contain errors; where they disagree with the record, the record is correct, and where description sections disagree with each other, Details wins._

## Summary

- Manufacturer: Hamamatsu
- Model: R645
- Condition: New From Surplus Stock
- Price: Quote only
- Availability: Not in Stock
- Warranty: 1-Year Warranty with 30-Day Return Guarantee
- ITAR restricted: No
- Shipping weight: 5 lb
- Shipping dimensions: 14X14X6 in

## Categories

- Lab & Analytical > Optical (primary)

## Details

### Configuration

- Spectral Response (nm): 185 to 850
- Peak Wavelength (nm): 450
- Tube Diameter (mm): Ø20
- Photocathode Area Min. (mm): Ø15
- Input Window Material: UV Glass
- Anode Supply Voltage (V): 100
- Peak Cathode Current (μA): 1
- Average Cathode Current Density (μA/cm2): 0.5
- Average Cathode Current (μA): 0.25
- Ambient Temperature (°C): -80 to +50

## Images

- <https://www.artisantg.com/itemimages/hamamatsu_r645_view1_2022811131316.jpg>
- <https://www.artisantg.com/itemimages/hamamatsu_r645_view2_2022811131316.jpg>
- <https://www.artisantg.com/itemimages/hamamatsu_r645_view3_2022811131316.jpg>