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Quad Amplifier Module

For many cutting-edge applications in flow cytometry, off-the-shelf components do not meet your exacting requirements. Whether you’re customizing an existing cytometer or building your own, the Tuolumne will simplify the process. The Tuolumne quad transimpedance amplifier module provides fixed-gain signal amplification to suit your needs.

Designed to work with both traditional PMTs as well as Silicon Photomultipliers (SiPMs), the Tuolumne allows you flexibility in customizing your instrument. This standalone unit is compact and easy to use, with simple I/O and power connections for plug-and-play convenience. The Tuolumne delivers excellent performance at low cost in a small, lightweight package.

The Tuolumne provides low noise amplification of output from PMTs or other devices that require an amplified current-to-voltage signal. It offers a broad input signal range, and a simple flip of a switch allows for inverted output signal. The Tuolumne comprises a 4-channel amplifier board in a compact housing, with I/O provided through SMA-type connectors for easy hook up.

The Tuolumne puts the performance of your flow cytometer in your hands.

The Tuolumne is a compact (9” x 8.5” x 3”) quad port PMT amplifier module for use in flow cytometry applications.

The frequency response of the Tuolumne amplifiers



Uses SMA-type connectors:

  • four amplifier inputs (from sensor)
  • four outputs
  • select non-inverted, grounded, or inverted output with an internal switch for each channel


Transimpedance Gain:

  • 7,600 V/A inverting or non-inverting

Input Characteristics:

  • Zin =50 Ω, max Iin =100 μA

Output Characteristics:

  • max Vout = 5 V (10 V pp)


  • 2 Hz to 200 kHz (f3dB)

Installation Requirements


  • approx. 9” x 8.5” x 3” (W x D x H)


  • 900 g (2 lbs.)


  • 15°C—30°C, 60% RH


  • 12 VDC, 1 A
  • 120–240 VAC, 50/60 Hz DC adapter included

† For Research Use Only. Not for diagnostic use. Specifications subject to change without notice.
The Tuolumne, or use thereof, may be covered in whole or in part by patents in the U.S. and other jurisdictions. A current list of applicable patents can be found here.

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