PTI--RatioMaster™

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RatioMaster

Technical Notes

System
Specifications

System
Enhancements

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PMT

PMTs

R 1527 or R 928

R 1527 PMT

Features:

Spectral response - 185 to 680nm
Cathode Sensitivity
- Luminous - 60 µ A/lm
- Radiant at 400nm - 60mA/W
Anode Sensitivity (at 1000V)

Luminous - 400 A/lm
Radiant at 400nm - 4.0 x 10⁵ A/W

Low Dark Current - 0.1 nA
Low Dark Counts (R1527P) - 10 cps

Parameter	Description/Value	Unit
Spectral Response	185 to 680	nm
Wavelength of Maximum Response	400	nm
Photocathode Material Minimum Effective Area	Low noise bialkali 8 x 24	— mm
Window Material	UV Glass	—
Dynode Secondary Emitting Surface Structure Number of stages	Low noise bialkali Circular-cage 9	— - -
Direct Interelectrode Capacitances Anode to Last Dynode Anode to All Other Electrodes	4 6	pF pF
Base	11-pin base JEDEC No. B11-88	—
Weight	45	g
Suitable Socket	E678–11A (option)	—
Suitable Socket Assembly	E717–21 (option)	—

PTI

R 928 PMT

Features:

Wide Spectral Response - 185 to 900 nm
High Cathode Sensitivity
- Luminous - 250 µ A/lm
- Radiant at 400nm - 74mA/W
High Anode Sensitivity (at 1000V)

Luminous - 2500 A/lm
Radiant at 400nm - 7.4 x 10⁵ A/W

Low Drift and Hysteresis

Parameter	Description/Value	Unit
Spectral Response	185 to 900	nm
Wavelength of Maximum Response	400	nm
Photocathode Material Minimum Effective Area	Multialkali 8 x 24	— mm
Window Material	UV Glass	—
Dynode Secondary Emitting Surface Structure Number of stages	Multialkali Circular-cage 9	— - -
Direct Interelectrode Capacitances Anode to Last Dynode Anode to All Other Electrodes	Approx. 4 Approx. 6	pF pF
Base	11-pin base JEDEC No. B11-88	—
Weight	Approx. 45	g
Suitable Socket	E678–11A (option)	—
Suitable Socket Assembly	E717–21 (option)	—

PTI