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BN-EOG2 - BioNomadix 2Ch EOG Pair

BIOPAC BN-EOG2 / BN-EOG2-T - BioNomadix 2Ch EOG

The Dual EOG BioNomadix amplifier is specifically designed to measure Electrooculogram (EOG) data on one or both channels.The transmitter unit can be used either with an MP160/MP150 using a matched receiver unit, or directly with a BioNomadix Logger. The matched pair emulates a "wired" connection from subject to computer, with all the benefits of a fully-wireless recording system.

BIOPAC BN-EOG2 / BN-EOG2-T - BioNomadix 2Ch EOG

BIOPAC BN-EOG2 BioNomadix 2Ch EOG Wireless Transmitter & Receiver Pair (for use with MP160/MP150 or BioNomadix Logger)

BIOPAC BN-EOG2-T - BioNomadix 2Ch EOG Amplifier/Transmitter module only (BioNomadix Logger use only)

The Dual EOG BioNomadix amplifier is specifically designed to measure Electrooculogram (EOG) data on one or both channels.The transmitter unit can be used either with an MP160/MP150 using a matched receiver unit, or directly with a BioNomadix Logger. The matched pair emulates a "wired" connection from subject to computer, with all the benefits of a fully-wireless recording system.

EOG signal data is transmitted at a rate of 2,000 Hz, providing an extremely high resolution EOG waveform at the receiver's output. Raw data from the pair is bandlimited from .005 Hz to 100 Hz, to provide a clinical standard, very high quality recording. The matched pair incorporates internal highpass and lowpass filters to provide for high quality amplification of the EOG waveform, which results from the corneal-retinal electrical potential. The pair is used to amplify the potentials appearing on the skin surfaces, surrounding the eyes, which are proportional to degree of eye movement and travel. The high signal to noise ratio and high time-based sampling resolution permit the pair to be used for precise oculomotor research/visual attention and visual evoked response studies.

Due to battery operation of the wireless transmitter and close proximity to the subject's body, common-mode rejection ratio is extremely high, considerably in excess of any typical wired EOG recording system. Accordingly, notch filters to remove mains interference (50 or 60 Hz) are typically not required.

EOG data can be recorded from two independent sites, typically above and below an eye and from temple to temple.

Use AcqKnowledge to evaluate nystagmus, saccadic eye movements and vestibular function. Using AcqKnowledge, wide bandwidth EOG data can be filtered to specific frequency ranges to accommodate high quality EOG signal identification even in the presence of extensive subject motion.

Biopotential amplifier/transmitter signal to noise ratio is very high (in excess of 70 dB), as the noise floor of the amplifier/transmission system is only 0.9 µV rms (bandwidth of .005 Hz to 100 Hz).

The module set has a fixed gain of 2,000. The largest EOG signal which can be measured is 10 mV pk-pk. The smallest signal which can be detected is less than 1.0 µV rms.

Interference with other recording modules or systems is greatly minimized because the transmitter is completely battery operated and operates totally independently of any other recording grounds or power sources. The recording transmitter is also extremely safe to use, because there is no physical connection to supply mains.

The transmitter attaches to the subject's head via stretchy Velcro strap, a stretch-mesh BioNomadix Shirt (see accessories), or Coban™ self-adhesive wrap (WRAP1). The exterior transmitter body dimensions (W x H x D) are approximately 6 cm x 4 cm x 2 cm and it weighs approximately 54 grams.

The transmitter's battery can provide power for up to 72 hours of continuous operation.

The BioNomadix series of wireless, wearable physiology monitoring devices for life science research are available for a wide range of signals, including ECG, EEG, EOG, EMG, EGG, Respiration, Pulse, Temperature, Electrodermal Activity, Impedance Cardiography and Accelerometry. BioNomadix are typically dual-channel units, offering either two of the same signal or a combination of signals.

BioNomadix noninvasively records high-quality, full-bandwidth data while comfortably allowing subjects to move freely in natural indoor environments. Each BioNomadix device consists of two parts, a transmitter that is worn by the subject to amplify and send the physiological data, and a receiver module or BioNomadix Logger. BioNomadix transmitters use digital transmission and short leads or transducers placed close to the signal source to provide excellent signal quality. BioNomadix are configured for specific signal types, so you don’t have to adjust settings on the hardware or software for high quality data.

Multiple BioNomadix units can be used to provide the optimum signal combination for a research study requiring biopotential or transducer signals. When used with a BIOPAC MP System, up to 16 channels of BioNomadix data can be recorded for multi-subject or multi-parameter protocols. The system also works with multiple MP160/MP150 systems or third-party data acquisition hardware via an isolated power supply module (IPS100C). The BioNomadix Logger can pair with up to 3 transmitter units providing up to 6 channels of physiological data as well as a color display for visual feedback, speaker for auditory feedback, vibration for haptic feedback, voice journal for participant comments, event markers, alarms, and a built-in accelerometer.  AcqKnowledge software adds the power of sophisticated automation and scoring routines for each signal type, plus customization options.

BioNomadix accessory items include transducers, electrode leads, and a custom, pocketed stretch-mesh shirt to comfortably hold multiple devices in place. The shirt has zippers placed for easy access to electrode sites and is available from extra small to extra large.

Developed and manufactured by BIOPAC Systems Inc., a leader in life science data acquisition and analysis, the new BioNomadix series delivers all the benefits of a wireless solution with the signal quality & integrity of a wired system. BioNomadix provides a cost-efficient option for uncompromised wireless physiological subject monitoring.

BioNomadix Transmitter and Receiver are shipped as a pair with matching serial numbers and include a strap and battery charger. To identify the matched Transmitter-Receiver Pair, press and hold "ID" button on Transmitter and match to Receiver with flashing "Status" LED.

Wireless EOG Specifications

Signal type: Electroculography (EOG), two channels

Bandlimits: Max: 0.005 to 100 Hz; Factory preset: 0.005 to 35 Hz
               Filter Options: 0.005 or 1 Hz HP, 35 or 100 Hz LP

Notch filter: 50/60 Hz user-controlled switch—factory preset OFF

Noise Voltage (shorted inputs): 0.9 µV rms (bandwidth of 0.005 Hz to 100 Hz)

Input Voltage Range: up to 10 mV P-P

Output Voltage Range: ±10 V  (receiver output)

CMRR: 110 dB typical at 50/60 Hz, 90 db minimum

CMII: 1000 M ohms (50/60 Hz)

Data transmit rate: 2,000 Hz (between BioNomadix transmitter and receiver)

Fixed Gain: 2,000

Operating time: ~72 hours continuous operation from full-charge

Transmitter: ultra-low power, 2.4 GHz bi-directional digital RF transmitter

Transmitter LED: Charge when YELLOW (blinking rate changes based on operational mode); unit has approx. 1 hour of power remaining when LED blinks all turn YELLOW.

Transmitter Battery: L-ion battery: full charge ~1 hour, ~500 charge cycles

Charger: BN-CHARGER included with each module pair

Receiver Power: MP160/MP150 Research System, isolated power supply IPS100C or BioNomadix Logger

Included strap: 76 cm - BN-STRAP76; additional sizes available

Size & Weight: Transmitter (approx.): 6 cm x 4 cm x 2 cm; 54 grams
                     Receiver (approx): 4 cm x 11 cm x 19 cm; 380 grams

Input (signal source): See BioNomadix Electrode Leads

Ground notes:

Each biopotential transmitter requires at least one GND. To eliminate redundant biopotential GND, use a 3-lead electrode lead cable for one input (CH A or B) and a 2-lead electrode lead cable for the other input (CH A or B) on each BioNomadix transmitter.

Advanced Setup Options
For details on these advanced options, see the MP Hardware Guide (available under the AcqKnowledge Help menu or Support > Manuals).


Calibration is not required—BioNomadix are factory-calibrated for specific signal types. For optional calibration to validate measurements, see the MP Hardware Guide.

Filter options

Switches can be set to enable the mains notch filter (50/60 Hz) and to set module bandwidths (as low as 1.0 Hz to 35 Hz).

Alternative signal

Switches can be set to record Derivative Mode as an integral EOG velocity indicator, which can be used for saccade or eye velocity investigations. This alternative signal replaces the raw signal; to display both signals, set up an AcqKnowledge calculation channel to process the raw signal.