Features

Designed for Use with the VCM-F Confocal Base System
Choose from Single- and Dual-PMT Units
High Sensitivity GaAsP with Low Noise or Standard Sensitivity Multialkali PMT Options
Spectral Responses

300-720 nm, High Sensitivity Models
185-900 nm, Standard Sensitivity Models

Software-Controlled Selection Between Three Included Emission Filters

Bandpass: 440 ± 40 nm
Bandpass: 525 ± 50 nm
Longpass: 600 nm

Thorlabs offers two different photomultiplier tube (PMT) Units for use with the VCM-F Confocal Base System. The PCU2A consists of two broadband, standard-sensitivity PMT modules. The PCUxB series consists of either one (PCU1B) or two (PCU2B) high-sensitivity, low noise PMT modules (see table for details). The dual-PMT units (PCU2A or PCU2B) are ideal for multichannel fluorescence imaging using the VCM-F Confocal Base System, as they can be fully controlled using the ThorVCM software. Each Dual PMT Unit comes standard with three emission filters that can be selected via software control. The user can toggle between a 440/40 and 525/50 bandpass filters or a 525/50 bandpass and 600 nm longpass filter. For other emission filters, please contact us for details and pricing.

Item#	PCU1B	PCU2B	PCU2A
Optical
Number of PMT Modules	1	2	2
Spectral Response	300 - 720 nm		185 - 900 nm
Sensitivity (Peak λ)	550 nm		450 nm
Radiant Sensitivity	176 mA/W		105 mA/W
Dark Current (Analog Mode)	0.4 nA (Typ.) 1.0 nA (Max)		2.0 nA (Typ.) 10 nA (Max)
Dark Count (Photon Counting Mode)	100 s^-1 (Typ.) 300 s^-1 (Max)		N/A
Rise Time	1.0 ns		1.4 ns
Ripple Noise	0.6 mV		0.5 mV
Gain	10⁶		10⁷
Optical Input	SMA
Electrical
Input Voltage	100 - 240 VAC
Output Signals	0 to -3.5 V
Output Impedance	50
Frequency Bandwidth (-3 dB)	DC - 50 MHz
Interface	USB 2.0
General
Storage Temperature	-20 to 50 °C
Operating Temperature	15 to 40 °C
Dimesions (W x H x D)	12.60" x 4.72" x 10.63" 320 mm x 120 mm x 270 mm

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Posted Comments:

Poster: jjurado

Posted Date: 2011-05-12 08:47:00.0

Response from Javier at Thorlabs to Gediminas: Thank you very much for your interest in this photomultiplier system. We will contact you directly to discuss pricing and technical information.

Poster: gadolinis

Posted Date: 2011-05-10 22:53:10.0

Hello. Could you tell me, how much cost unit, for emission collection till 700 nm? How big is photodetector active aria? Best Regards, Gediminas

Poster: Thorlabs

Posted Date: 2010-07-13 10:12:02.0

Response from Javier at Thorlabs to balaji2007: thank you for your feedback. Below are the noise specifications for the PMTs used in the PCU1A and PCU1B: For the PCU1A: (Anode) Dark Current (after 30 min.) - 2 nA (typical), 10 nA (max.) Ripple Noise (peak to peak) - 0.5 mV For the PCU1B: (Anode) Dark Current (after 30 min.) - 0.4 nA (typical), 1.0 nA (max.) Ripple Noise (peak to peak) - 0.6 mV (See Specs Tab) We do not have quantum efficiency graphs for these, at the moment, but I can send you specification sheets with responsivity curves. I will contact you directly.

Poster: balaji2007

Posted Date: 2010-07-10 21:36:53.0

It will be nice to see the quantum efficiency and noise specification of your PMTs.

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PMTs for Confocal Fluorescence Imaging

Features