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Phototube

R840

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For UV to visible, Peak wavelength : 340 nm, Photocathode area : 8 mm dia., Tube diameter : 15 mm

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Specifications

Features For UV to Visible
Type Standard
Spectral Response (Short) 185 nm
Spectral Response (Long) 650 nm
Spectral Response (Peak) 340 nm
Tube Diameter Dia.15 mm
Photocathode Area Min. Dia.8 mm
Photocathode Material Sb-Cs
Input Window Type Head-on
Window Material UV Glass
[Maximum Ratings] Anode Supply Voltage 100 V
[Maximum Ratings] Peak Cathode Current 2 µA
[Maximum Ratings] Average Cathode Current Density 5 μA/cm2
[Maximum Ratings] Average Cathode Current 0.5 μA
[Maximum Ratings] Temperature -80 to +50 ℃
Luminous Sensitivity Typ. 80 µA/lm
Luminous Sensitivity Min. 40 µA/lm
Dark Current Max. 2 pA
Rcommended Operating Voltage 15 V
Interelectrode Capacitance 2.4 pF

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