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TWO CHANNELS COMBINAISON BRIDGE-ECG-EMG-EEG AMPLIFIER
(Model: ETH-256)
The ETH-256 is a 2 channels high performance, general-purpose life science research amplifier, allowing faithful low noise recording of biopotential (Electrocardiogram, Electromyography, Electroencephalogram) signals. And ideal tool for both physiology and pharmacology teaching and research!

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Presentation

The ETH-256 is a high performance general-purpose life science research amplifier. Its high input impedance and high CMR allow faithful low noise recording of biopotential (ECG,EMG,EEG) signals, as well as outputs from strain gauge type transducers, such as force, displacement and pressure.

Each channel can provide ±5.0V of excitation at 50 mA, adequate for most commonly used transducers. In addition, customers may specify adapter cables to accommodate Grass, Gould or HP sensors.

Working principles

The ETH-256 offers eight gain settings, x1, x5, x10, x50, x100, x500, x1k and x5k. Signals may be further conditioned using high and low pass frequency filters. All filters are four pole active design with sharp roll offs. High pass filter cuts, useful for biopotential measurements, are available at DC, 0.03 Hz, 0.3 Hz and 3 Hz. Low pass filters, useful for limiting high frequency noise, are available at 5 Hz, 50 Hz, 150 Hz, 2 kHz and 10 kHz.

Either of the ETH-256 amplifier's channels may be configured as a bridge-style transducer amplifier or as a biopotential amplifier. In bridge mode the ETH-256 amplifier's 10 GW input impedance and differential input allow it to accept input from force, displacement or pressure transducers. In addition, input from many thermistors, pH electrodes and other variable resistance devices is possible.

In the biopotential mode, the ETH-256 functions as a low noise AC coupled preamplifier for the recording of biopotentials. A three-lead cable with integral isolation amplifiers is provided to allow safe surface recording of ECG, EMG and EEG signals from human subjects.

ETH-256C: includes the C-ISO-256 isolated headstage for recording ECG, EMG, and EEG signals from humans
ETH-256C: includes the C-ISO-256 isolated headstage
for recording ECG, EMG, and EEG signals from humans
Key features

• 8 different gain settings: x1, x5, x10, x50, x100, x500, x1k and x5k
• Channels may be configured as a bridge-style transducer amplifier or as a biopotential amplifier
• Low noise AC coupled preamplifier
• All filters four pole active design with sharp roll offs
• High pass and low pass filters
• Three-lead cable with integral isolation provided

Domains of application

• Low noise recording of biopotential(ECG,EMG,EEG) signals in humans
• Outputs from strain gauge type transducers, such as force, displacement and pressure
• Biopotential amplifier
• Teaching or research context for all physiology applications

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Number of channels 2
Operational Modes Bridge, Biopotential (ECG, EMG, EEG)
Gain x1, x5, x10, x100, x500, x1k, x5k (push button selectable)
Low Pass Filter 4 pole active filters at 5, 50, 150, 2k, and 10 khz
High Pass Filters 4 pole active filters at DC, 0.03, 0.3, and 3 Hz
Input Impedance 10 Gz
Output Impedance 100z
CMR 100 db @ 60 Hz
Offset Range + 5 V
Input Range + 5 V
Input Connector BNC and DIN
Isolation Optical with optional cable
Transducer Excitation Voltage + 5 V
Current 50 mA/channel
Power 12 VAC wall adapter
Enclosure Aluminum (CE Compliant)
Part Number ETH-256C (with isolated 3-lead cable)

Model:
ETH-256
Two Channels Combinaison Bridge-ECG-EMG-EEG Amplifier
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Related products:
ETH-401
Four channel transducer amplifier
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BP-100 Intravascular blood pressure transducer
DT-475 Displacement transducer
FT-104 Force transducer
RM-200 Respiration monitoring belt
PT-100 Pulse plethysmograph
TM-100 Temperature sensor
SP-304 Spirometer
A full range of professional sensors and cables is available on request
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