Making Physiology Happen

ETH-256 Two Channel Combination Bridge/ECG/EMG/EEG Amplifier with Isolated Head Stage

Description

The ETH-256 is a high performance general-purpose life science research amplifier. Its high input impedance and high CMR allows low noise recording of biopotential signals, as well as outputs from strain gauge type transducers, such as force, displacement and pressure. The optional C-ISO-256 isolated head stage may be used with the ETH-256 for recording ECG, EMG and EEG signals from humans.

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.

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 gigOhm 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.

Also consider the IA-400D  a 4 channel amplifier, that with the C-ISO-256, can also be used for measuring biopotentials such as ECG, EMG etc in humans.

Comparision between the IA-400D and the ETH-256

 

ETH-256 Vs IA-400D

Comparision between the IA-400D and the ETH-256

Quick Comparision between the ETH-256 and IA-400D

ETH-256 IA-400D
Number
of Channels
2 4
Gain Set by Transducer and
x1,
x5, x10, x100, x500, x1k, x5k 
Set by Transducer
(x400 with C-ISO-256)
Low
Pass Filter
5,
50, 150, 2k, and 10 khz
50Hz and 10kHz
High
Pass Filter
DC,
0.03, 0.3, and 3 Hz
DC
(0.05 Hz with C-ISO-256)
Transducer
Excitation Voltage
+5V and -5V +5V and -5V
Power 12 VAC wall adapter 12 V DC wall adapter

 

Some Transducers compatible with the ETH-256
C-ISO-256
3-lead isolated Biopotential recording preamplifier
BP-100
Blood Pressure Transducer with Extension Cable
BP-102
Blood Pressure Transducer System
BP-600
Non-Invasive Blood Pressure Sensor with DIN8 connector
CM-100
Conductvity Probe
DO2E-200
Combination Current-to-voltage adapter, includes Clark style 02 probe
DT-475
Displacement Transducer
EIM-100
Emotional Intensity Meter
EM-100
Event Marker with DIN connector
ES-300
Electronic Stethoscope
FRS-100
Foot Reaction Switch
FT-302
Dual Range Force Transducer (0 to 10g and 0 to 100g)
FT-325
Hand Dynamometer with DIN connector
GN-100
Single-Axis Goniometer
HS-100
Humidity Sensor
HSM-300
Heart Sounds Microphone with DIN Output
IC-200
Intracellular Probe
ISE-100
pH Electrode
LS-100
Light Sensor
PHRM-100
Polar(R)Heart Rate Monitor Trans./Receiver with DIN connector
PT-104
Pulse Plethysmograph (piezo crystal) with DIN connector
RM-204
Respiration Monitor (piezo crystal) for use with iWorx interfaces.
RM-204A
Respiration Monitor (piezo crystal) fwith DIN Connector (Animal)
SP-304
Spirometer with reuseable 300 Liter flow head
TCI-300K
Thermocouple K-type Interface
TCI-300T
Thermocouple T-type Interface
TM-100
Temperature Sensor with DIN connector
TM-200
Skin Surface Temperature Sensor with DIN connector


Part Number: ETH-256

Manual: ETH-256

iWorx ETH-256 Specifications
Number of channels 2
Operational Modes Bridge, Biopotential (ECG, EMG, EEG) 
Gain x1, x5, x10, x100, x500, x1k, x5k
Low Pass Filter
(4 pole active)
5, 50, 150, 2k, and 10 kHz
High Pass Filters
(4 pole active)
DC, 0.03, 0.3, and 3 Hz
Input Impedance 10 gigOhm
Output Impedance 10 Ohm
CMR 100 db @ 60 Hz
Offset Range + 5 V
Input Range + 5 V
Input Connector BNC and DIN
Isolation Optical with optional C-ISO-256
Noise <10 mV (RTI)/<2 uVolt (RTI)
Transducer Excitation Voltage + 5 V
Current 50 mA/channel
Power 12 VAC wall adapter
Enclosure Aluminum