CWE Biomedical Amplifier BMA-200 AC/DC
High-performance, battery-operated biopotential amplifier with built-in audio monitor
● High-performance portable extracellular amplifier
● Battery operated
● Amplifier for EEG, ECG, EMG, and other extracellular applications
The BMA-200 is a low-noise, portable, battery operated amplifier for EEG, ECG, EMG, and other extracellular applications. The BMA-200 features a wide gain range, sharp cutoff bandpass filters, an AC calibrator, and a built-in audio amplifier and speaker for monitoring the signal. Stimulus delivery to the electrodes is accomplished by a front-panel switch, or via an external logic signal. True DC response is switch-selectable, with a variable DC offset control. Low-power circuitry contributes to long operating time between charges, or the unit can be operated continuously with the included AC adapter. It can be used as a stable DC amplifier, and includes adjustable DC input offset controls.
Positive and negative DC voltages are provided at the input connector for bridge excitation or powering optional head-stage active probes. For human subject recording, the ISO-Z Isolation Amplifier head-stage should be used. Active probes are available for high-impedance microelectrode applications. The BMA-200 is fully compatible with the complete line of cables, electrodes, and other accessories available for the BMA-931 modular amplifier.
The BMA-200 is the latest in our line of high-performance preamplifiers. Its versatility and wealth of features make it equally at home in the laboratory or as a rugged field instrument.
Options:
● 220V charger/adapter
● Pre-wired input cable
● ISO-Z Isolation head-stage
● Electrodes
● Spare connectors & pin plugs
Note: Not to be used for human life support applications.
| Channels | 1 |
| Input Type | Differential instrumentation amp |
| Impedance | > 109 Ω |
| Wideband Noise, RTI | <7μV P-P |
| Common Mode Rejection | >95 dB |
| Gain Range | 10X - 50,000X, 12-positions |
| Filter Type, Slope | Butterworth, flattest response, -12 dB/octave |
| Coupling | AC or DC, switchable |
| Input Offset Adjustment Ranges | +2 mV, +20 mV, +200 mV, jumper selectable |
| Voltages at Input Jack for External Devices | +7.2 V, 20 mA max current |
| AC Calibrator | 1 mV P-P square wave, approx. 10 Hz |
| Low-pass Filter | 100 Hz - 50 kHz, 6-positions |
| High-pass Filter | DC - 300 Hz, 6-positions |
| Input Connector | Amphenol 703-91T-3478-009 7-pin |
| Stimulus Record Input | TTL negative logic, or switch closure |
| Stimulus Inputs (Rear Panel) | 2 mm (0.080”) pin jacks |
| Audio Amplifier | 200 mW, built-in mylar speaker |
| Audio Output Connector | 3.5 mm stereo mini-phone jack |
| Output Connector (Rear Panel) | BNC jack |
| Operating Time Between Charging | Approx. 24 hours |
| Power Adapter/Charger | 24 VDC |
