EXT-16DX - 16 channel Extracellular Amplifier
RI-T1DX - 16 Channel Resistance Meter and Current Injector


  • Extracellular recordings with up to 16 channels
  • Up to 16 gain stages, 16 high pass and 16 low pass filter corner frequencies; set by rotary switch
  • Customized configuration for all channels (set by factory)
  • Digital display of selected channel, gain, high pass and low pass filter corner frequency
  • Remote operation with digital I/O card or manual operation with switches and push button
  • Brightness of displays adjustable for simultaneous fluorescence measurements
  • Referenced or single ended recording mode (set by switch)
  • External npi power supply or rechargeable batteries for extra-low-noise operation
  • Extracellular signals available at BNC connectors or at SCSI/SubD connector for direct linking to data acquisition card

With R/I-T1DX

  • Electrode resistance test separately for each electrode
  • Current injection (up to ±1 µA, bipolar) for each electrode


16 Channel Headstage with Current Injection

16-channel headstage with current injection

  • 16 single-ended channels
  • One layer for current injection / resistance measurement
  • Shielding layer
  • Designed for use with NeuroNexus probes with A16 package


16 Channel Switchable Headstage

Switchable 16-channel stimulation headstage

  • 16 single-ended recording channels
  • Each channel switchable to high-voltage stimulation
  • 1mm pins for connecting electrodes


16 Channel Headstage for in-vivo

16 channel headstage for in-vivo recordings

  • 16 recording channels
  • Built-in acceleration sensor (3 axis)
  • Two independent stimulation lines
    for high-voltage stimulation with separate electrodes
  • Omnetics connector for direct connection of
    NeuroNexus probes with CM-16 package

Technical Data

>1012 Ω, range ±2 V

Differential Input:
CMR >70 dB at 1 kHz (tested with 0 Ω input resistance)

Input Capacitance:
10 pF

CHANNEL Monitor:
-8V…+7V; +13V in single ended mode

single pole, attenuation: -6 dB / octave, corner frequencies (Hz): DC, 0.1, 0.3, 0.5, 1, 3, 5, 10, 30, 50, 100, 300, 500, 800, 1k, 3k; selected by rotary switch


LOWPASS Filter:    
single pole, attenuation: -6 dB/octave, corner frequencies (Hz): 20, 50, 100, 200, 300, 500, 700, 1k, 1,3k, 2k, 3k, 5k, 8k, 10k, 13k, 20k; selected by rotary switch

LOWPASS Monitor:

10, 20, 50, 100, 200, 500, 1k, 2k, 5k, 10k; selected by rotary switch

GAIN Monitor:    

range: ±10 V into 1 kW / ±1 V into 50 W

External power supply:    
115/230 Volt AC, 60/50 Hz, fuse 1.6/0.8 A, slow

19” rackmount cabinet
19” (483 mm), 10” (250 mm), 3.5” (88 mm)

Headstage Size:
without housing, approx. 40 mm x 18 mm, with holding bar


Part No. Description
EXB-16DX 16 channel extracellular amplifier (requires headstage and power supply)
EXB-16DX-8 8 channel extracellular amplifier (requires headstage and power supply)
EXB-16DX-4 4 channel extracellular amplifier (requires headstage and power supply)
EXB-16B 16 channel amplifier/filter (no headstage, just BNC inputs and outputs, requires power supply)
EXT-PWR-03D External power supply for EXT-16DX, EXT-16B or R/I-T1DX (can drive one EXT-16DX and one R/I-T1DX simultaneously)
R/I-T1DX Electrode Resistance Test and Current Injection system for EXT-16DX