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BIOAMPLIFIER WITH BANDPASS FILTERS
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Contact our Behavioral Research Specialists for more information
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These BioAmplifiers are designed for a wide range of applications including EMG, ECG, EEG, SPR, and others. They have a built-in bandpass filter network, a 60 (or 50) Hz notch filter that can be bypassed, and a coupler filter between the preamp and main amplifier sections. These BioAmplifiers provide a maximum gain of 50 thousand. With the selectable preamp coupling, high pass filter settings of 0.1, 1.0, 8, 13, 90, and 150 Hz are available. The selectable low pass filter settings are 13, 40, 150, and 1,000 Hz. These BioAmplifers can also be set ot “open” where no low pass filtering is used. The high and low pass filter sections are two pole butterworth filters, -12 dB per octave. The V75-04 is used when isolation is required to prevent interference when multiple signals are being recorded from one subject. Isolation from earth ground for safety may also be required in situations where other sources of voltage with respect to earth ground are present in the environment and represent a hazard to the subject.
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BIOAMPLIFIER (NO FILTERS)
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Contact our Behavioral Research Specialists for more information
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The V75-02 and V75-05 are designed for a wide range of applications and are used when filtered signals in bands not available on the V75-01 and V75-04 are to be studied or when sharper filtering than the 12 dB per octave cutoffs included in the V75-01 and V75-04 filters is desired. A 60 (or 50) Hz notch filter is built in and can be bypassed These BioAmplfiers can be used with the V75-50 EEG Band Separation Filter, the V75-48 High Performance Bandpass or in virtual applications when filtering is being done through digital signal processing. Like the V75-01 and V75-04, these BioAmplifiers have high gain and low noise making it useful for all physiological signals. The V75-05 is used when isolation is required to prevent interference when multiple signals are being recorded from one subject. Isolation from earth ground for safety may also be required in situations where other sources of voltage with respect to earth ground are present in the environment and represent a hazard to the subject.
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DIRECT COUPLED BIOAMPLIFIER
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Contact our Behavioral Research Specialists for more information
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The V75-03 and V75-06 are directly coupled to the input signal without a preamplifier-coupling filter. These are used for very low frequency signals. A 60 (or 50) Hz notch filter is built in and can be bypassed. Biopotentials from electrodes may be of very large potential with only a small variation "riding on top" of the overall signal. AC coupled amplifiers like the V75-01, V75-02, V75-04, and V75-05 BioAmplifiers de-couple any overall, large DC potential and pass only the variation (above the frequency selected on the preamplifier coupling control). These BioAmplifiers are used when the entire signal (absolute level) or very slow variations are of interest for signals like ENG and EOG. The V75-06 is used when isolation is required to prevent interference when multiple signals are being recorded from one subject. Isolation from earth ground for safety may also be required in situations where other sources of voltage with respect to earth ground are present in the environment and represent a hazard to the subject.
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ISOLATED BIOAMPLIFIER WITH BANDPASS FILTERS
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Contact our Behavioral Research Specialists for more information
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These BioAmplifiers are designed for a wide range of applications including EMG, ECG, EEG, SPR, and others. They have a built-in bandpass filter network, a 60 (or 50) Hz notch filter that can be bypassed, and a coupler filter between the preamp and main amplifier sections. These BioAmplifiers provide a maximum gain of 50 thousand. With the selectable preamp coupling, high pass filter settings of 0.1, 1.0, 8, 13, 90, and 150 Hz are available. The selectable low pass filter settings are 13, 40, 150, and 1,000 Hz. These BioAmplifers can also be set ot “open” where no low pass filtering is used. The high and low pass filter sections are two pole butterworth filters, -12 dB per octave. The V75-04 is used when isolation is required to prevent interference when multiple signals are being recorded from one subject. Isolation from earth ground for safety may also be required in situations where other sources of voltage with respect to earth ground are present in the environment and represent a hazard to the subject.
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ISOLATED BIOAMPLIFIER (NO FILTERS)
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Contact our Behavioral Research Specialists for more information
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The V75-02 and V75-05 are designed for a wide range of applications and are used when filtered signals in bands not available on the V75-01 and V75-04 are to be studied or when sharper filtering than the 12 dB per octave cutoffs included in the V75-01 and V75-04 filters is desired. A 60 (or 50) Hz notch filter is built in and can be bypassed These BioAmplfiers can be used with the V75-50 EEG Band Separation Filter, the V75-48 High Performance Bandpass or in virtual applications when filtering is being done through digital signal processing. Like the V75-01 and V75-04, these BioAmplifiers have high gain and low noise making it useful for all physiological signals. The V75-05 is used when isolation is required to prevent interference when multiple signals are being recorded from one subject. Isolation from earth ground for safety may also be required in situations where other sources of voltage with respect to earth ground are present in the environment and represent a hazard to the subject.
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ISOLATED DIRECT COUPLED BIOAMPLIFIER
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Contact our Behavioral Research Specialists for more information
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The V75-03 and V75-06 are directly coupled to the input signal without a preamplifier-coupling filter. These are used for very low frequency signals. A 60 (or 50) Hz notch filter is built in and can be bypassed. Biopotentials from electrodes may be of very large potential with only a small variation "riding on top" of the overall signal. AC coupled amplifiers like the V75-01, V75-02, V75-04, and V75-05 BioAmplifiers de-couple any overall, large DC potential and pass only the variation (above the frequency selected on the preamplifier coupling control). These BioAmplifiers are used when the entire signal (absolute level) or very slow variations are of interest for signals like ENG and EOG. The V75-06 is used when isolation is required to prevent interference when multiple signals are being recorded from one subject. Isolation from earth ground for safety may also be required in situations where other sources of voltage with respect to earth ground are present in the environment and represent a hazard to the subject.
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4-CHANNEL EEG AMPLIFIER (FULL BAND)
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Contact our Behavioral Research Specialists for more information
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The V75-08 features four independent amplifiers for EEG recording. This allows multi-site recording of full band EEG in a minimum amount of space and with great economy. Continuous recording sleep studies using 16 channels can be accomplished with just 5 modules (4 V75-08 EEG Amplifiers and an interface module). The unit has a gain control for each channel consisting of a range switch and a vernier control. Maximum gain is 50 thousand. Gain ranges of 5, 10, 20 or 50 thousand are set with the switch and are precisely calibrated. The vernier control may be switched off of the calibrated position and used to set any gain from the full gain selected with the switch to zero by turning counterclockwise.
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ISOLATED 5-LEAD ECG AMPLIFIER (PROG. LEAD SELECT AND DEFIB. PROTECTION)
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Contact our Behavioral Research Specialists for more information
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The V75-11 ECG Isolated Amplifier/Coupler performs all the standard multi-lead ECG monitor functions by either manual or program control. Switch selectable options are available to make this module meet the requirement of almost any application. Sensitivity is selected manually; lead selection and calibration may be performed manually or by program control. The unit is isolated so that it may be used with other amplifiers and couplers and to provide isolation for safety. The notch filter (50 or 60Hz) may be switched off. It features a low frequency cutoff filter switch for 0, 1, 1.0 or 10 Hz, and artifact suppression, time-constant-select-switching for 1.0 seconds or 10 seconds.
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ADJUSTABLE (PROGRAMMABLE/MANUAL) HI/LO BANDPASS FILTER (48dB/Oct)
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Contact our Behavioral Research Specialists for more information
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The V75-48 consists of independent low pass and high pass filter sections and can accept two signals for independent Hi Pass filtering and Lo Pass filtering or one signal to provide bandpass filtering. Both the Hi Pass filter and Low Pass Filter are continuously adjustable either by manual or program control. A display on the front panel indicates the filter setting for both the Hi Pass and LowPass filters multiplied by the range.
The extremely sharp filter skirts (-48 dB per Octave) and the continuous adjustment make this filter the choice for demanding applications for very narrow band and/or precisely defined signals.
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EEG BAND SEPARTION FILTER (5 BANDS)
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Contact our Behavioral Research Specialists for more information
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This filter separates EEG signals into five bands simultaneously. The input may come from any bioamplifier capable of amplifying signals between 1 and 40 Hz. The 4-pole Butterworth bandpass filters give -24 dB/octave cutoffs. This level of filtering is adequate at the nominal EEG bands for nearly any purpose. Multiple units can be used in series to increase the roll off to -48 dB per octave (two filters), -72 dB per octave (three filters), etc. The V75-02 and V75-05 bioamplifiers without filters are recommended for use with this filter owing to the economy of not paying more for the models with onboard filters. One (or more) of these may be used with the V75-08 4-channel EEG amplifier.
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