BMA-400 AC/DC low-noise 4-channel extracellular bioamplifier

Four-channel extracellular bioamplifier

Product Category: Amplifiers
Part No.: 09-03010
  • 4-channel AC/DC amplifier for all extracellular recording
  • Low-noise, wide gain range
  • Multi-channel EEG, EMG, ECG recording
  • True DC response with adjustable offset
  • Stimulus passing to electrodes
  • Isolation head-stage (ISO-Z) and high impedance head-stage (HS-1) are available

Input type: Differential
Input range for full-scale output: +100mV - 0.5V 
Input impedance: >1000 Megohm
Noise, referred to input: <5mV P-P, wideband
Common Mode Rejection: >95dB
Gain range: 10X - 50,000X, 12-positions 
Low-pass filter: 100Hz - 50kHz, 6-positions
High-pass filter: DC - 100Hz, 6-positions
Filter type, slope: Butterworth, flattest response, -12dB/octave
Stim/record input: TTL
Input connections (rear panel): Amphenol 703-91T-3478-009 7-pin 
Output connections (rear panel): BNC jack
Data port connector (rear panel): 25-pin D-SUB female
Power requirements: 115/230VAC, 10VA 
Dimensions: 12W x 4H x 9D inches, 30 x 10 x 23 cm

Note 1: Not to be used for human life support applications.

The BMA-400 Bioamplifier is a low-noise, four-channel instrument for amplifying EEG, ECG, EMG, and other extracellular biopotential signals. It features low noise, a wide gain range, and sharp cutoff bandpass filters. It can be used as a stable DC amplifier, and includes adjustable DC input offset controls.

Logic inputs control stimulus passing through the recording electrodes. This stim/record inputs, as well as the four channel outputs, are connected to a multi-pin connector on the rear panel for convenient cable connections. Four standard input cables are provided, and a range of electrode lead-wires are available (needle, snap, etc.). Unwired input plugs are available for fully custom electrode configurations.

Applications for the BMA-400 Bioamplifier include multi-channel EEG, EMG, and other extracellular biopotential measurements. Head-stages are available for high-impedance electrodes or custom recording applications, including the ISO-Z isolated head-stage. 

Data Sheet

Other Attachments


Alligator clip electrode leads, set of 3

Alligator clip electrode leads, set of 3

Part No. 10-02065

Color-coded, solid copper miniature alligator clip leads. 39" (1m) long, terminated with 1.5mm Touch-Proof plug. Application: animal ECG recording.

BMA-400 PS (12V)

Part No. 08-03112

Battery charger for BMA-400, 12V input, for car battery operation.

110/220V International power supply for SYSTEM 400/H, BMA-931

BMA-400 PS: International Power Supply

Part No. 09-03200

110/220V International power supply for SYSTEM 400/H, BMA-931

BNC patch cable, 20' long


Part No. 10-10012

BNC-BNC patch cable, 20' long

BNC patch cable, 3' long


Part No. 10-10010

BNC-BNC patch cable, 3' long

BNC patch cable, 6' long


Part No. 10-10011

BNC-BNC patch cable, 6' long

CT-1000 high-level input cable, BNC termination, 2' long

CT-ICA-SE high-level input cable

Part No. 10-06011

CT-1000 high-level input cable, BNC termination, 2' long

D-482 ECG, EMG electrode

D-482 ECG, EMG electrode

Part No. 10-02066

Disposable pre-gelled ECG, EMG electrode, 1" (2.5cm) dia, pack of 150