Application:

A handheld electrophysiological amplifier system, battery powered, with audio feedback.  This device is designed to amplify electrophysiological signals from muscle and provide audio feedback to assist clinicians in locating areas of muscle activity.  This device needs to be used particularly in needle EMG guided injection applications.

Specifications for Electrophysiological Amplifier Unit, EMG unit

Input resistance:  100 GigaOhms

Maximum Electrode Impedance:  300 MegaOhms

CMMR:  60 Hz >90dB; 120 Hz > 85dB

Signal to Noise Ratio:  > 110dB

Gain:  Continuously variable 200-20,000

Gain:  300 mW

Input Connectors:  Panel mounted male touchproof type

Power Supply:  Two AA batteries (Approximately 2.5 Volts DC)

Fuse:  ½ Amp Slo-Blow

Enclosure:  Flame retardant ABS, UL flammability rating 94V-O

Dimensions:  5.0"L x 2.6"W x 1.0"H (130 mm x 65 mm x 26 mm) or smaller

Weight:  Approx. 0.1 lb with cable (50 grams) or lighter

Warranty:  30-90 days

Connector:  Three female 1.5 mm touchproof connectors designed to mate with the unit itself.  The opposite end of the cable must have two colors keyed alligator clips and one male 1.5 mm touchproof connector designed to mate with electrodes.

Cable length: 28 inches (71cm) from touchproof female connectors to touchproof male connector.  32 inches (81cm) from touchproof female connectors to colored keyed alligator clips.