Qubit Systems’ S225 Electrooculograph (EOG) Sensor is used to monitor eye movement of a stationary subject. A reference electrode is placed on the forehead, electrodes are placed on the right and left temples for lateral eye movement detection, and above and below an eye for vertical eye movement detection. The sensor must be used with the C410 LabPro Interface and C901 Logger Pro software or other data acquisitions interface and software.

All human electrophysiology and human respiratory monitoring products produced by Qubit Systems Inc. are not approved for medical or clinical applications.

The S225 EOG Sensor detects Lateral and vertical movement of the eyes and these are plotted on different channels as voltages, or the EOG can be calibrated for each subject to provide angles of eye movement in both the horizontal and vertical plane. A convenient reset button allows the instrument to be zeroed when the subject is looking straight ahead.

Like the S220 GSR sensor, the S225 EOG sensor has applications in both physiology and psychophysiology laboratories, and is always extremely popular with students who wish to investigate how mind and muscle interact.

The S225 EOG sensor comes with 3 electrode cables, a set of 100 disposable electrodes, an AC/DC transformer and a laboratory manual. The lab manual outlines the source of the electrical signals and various experiments which can be conducted with the sensor.

Students are fascinated by the electrophysiology of muscles that control eye movement, and more so by the way in which our eyes track and scan objects.

Numerous experiments are possible to determine how different subjects respond to different images. Show the subject an advertising poster and determine how the subject’s eyes move to the most important features of the image. Advertisers use EOG devises in poster design. Show the subject a map and ask them to find a particular city, or a group of cities with certain characteristics (e.g. population size). How effective is the legend of the map in helping the subject? How often is the legend consulted? Does the subject scan the map in a specific pattern or more irregularly?

Specifications:

• power supply: 6V, 500mA
• size (h/w/l) cm: 5.8/12.8/13.1
• weight (g): 340
• materials: plastic (tan, black)
• warranty: 1 years

The S220 Galvanic Skin Response (GSR) Sensor measures the psycho-galvanic reflex. This reflex generates a change in skin conductivity during periods of stress, excitement or shock.

All human electrophysiology and human respiratory monitoring products produced by Qubit Systems Inc. are not approved for medical or clinical applications.

The S220 GSR sensor monitors skin conductivity between two reusable electrodes attached to 2 fingers of one hand. While the subject is at rest, a steady background signal will be monitored by C901 LoggerPro software on the computer screen. It is also possible to obtain an audible signal. The subject may then be stimulated in different ways and the degree of stimulation measured graphically.

The GSR sensor can be used in bio-feedback studies in which the subject learns to control emotional state voluntarily by using relaxation techniques. This is often done with closed eyes while listening to the audible signal from the GSR sensor. The pitch of this signal declines as skin conductivity decreases, allowing the subject to concentrate on, and monitor, the degree of relaxation. Alternatively, the subject can watch the graphical response on the computer screen while using relaxation techniques such as controlled breathing. Relaxation techniques with eyes open and eyes shut can then be compared. The sensor must be used with the C410 LabPro Interface and C901 Logger Pro software or other data acquisitions interface and software.

As well as relaxation studies, the S220 GSR sensor can also be used to determine the types of stimuli that excite various subjects. For example, the stimulatory or relaxing effect of different colors can be assessed, as well as the effects of various patterns and images.

Specifications:

• power supply: 6V, 500mA
• size (h/w/l) cm: 5.8/12.8/13.1
• weight (g): 350
• materials: plastic (tan, black)
• warranty: 1 years

data from GSR Sensor:

Qubit Systems’ strain-gage based isometric S216 Hand Dynamometer is designed for measurements of grip strength, pinch strength and to perform muscle fatigue studies.  This instrument can be used with the C410 LabPro interface and C901 Logger Pro software in a variety of experiments, and may be combined with other sensors such as the S210 EMG sensor for comprehensive studies of muscle activity.

The S216 Hand Dynamometer is factory calibrated in Newtons (N)  kilograms (Kg) or punds (lb) of force. The sensor amplifies the force applied converting it into voltage that is monitored by the C410 LabPro interface and read in the desired units of force in C901 LoggerPro software.  To measures grip strength  hold the sensor in a vertical position with arm perpendicular to the body and fingers on the pad.  Both, relative strength of the left and right hand and muscle fatigue and endurance can be measured. To measure the pinch strength (finger strength) place the fingers on the pinch senor pads in a vertical alignment.  Its sensitivity ensures that all students may obtain excellent signals, and may participate in the full complement of studies.

A favorite investigation involves the control of grip strength in which students attempt to obtain repeated measurements of the same magnitude. By changing frequency of repetition, muscle control and endurance may be studied. Coupled with EMG measurements, this provides a very informative and entertaining laboratory session.

All human electrophysiology and human respiratory monitoring products produced by Qubit Systems Inc. are not approved for medical or clinical applications.

Specifications:

• Force Range: 0 – 600 N
• Typical Accuracy: ± 0.6 N
• Resolution: 0.2141 N
• maximum force without damage done to sensor: 0 to 850 N
• size: 17.5×2.5 cm
• weight: 100g
• warranty: 1 years

Qubit Systems’ surface S210 electromyograph (EMG) Sensor records the electrical activity of muscles. Normal muscle tissue is electrically silent when relaxed. When it is active during a contraction, an electrical current is generated that can be measured at the surface of the skin. The strength of the signal depends upon the number of muscle motor units recruited to contract the muscle.

The electrical signal from S210 EMG  Sensor is recorded by C410 LabPro interface and C901 Logger Pro software on the computer screen. This waveform can be analyzed using Logger Pro’s zoom In feature and data analysis capabilities. Either raw data may be collected from the EMG sensor or data that is rectified for easier analysis.

An audible signal is produced as the muscle is flexed so that the subject receives a visual and an aural indication of the strength of the contraction. Both stimuli may be used by the subject to control the contraction of the muscle and the number of motor units recruited. The EMG may also be used to study involuntary muscle movement such as the “knee jerk” reaction.

The EMG Sensor S210 can be combines with Qubit Systems’ S216 Hand Dynamometer (sold separately) for comprehensive studies of muscle activity.

A favorite investigation involves the control of grip strength in which students attempt to obtain repeated measurements of the same magnitude. By changing frequency of repetition, muscle control and endurance may be studied. Coupled with EMG measurements, this provides a very informative and entertaining laboratory session.

All human electrophysiology and human respiratory monitoring products produced by Qubit Systems Inc. are not approved for medical or clinical applications.

Specifications:

• power supply: 6V DC, 500mA
• size (h/w/l) cm: 5.8/12.8/13.1
• weight (g): 250
• materials: plastic (tan, black)
• warranty: 1 years