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AT53 Portable Dual-Channel EMG

The AT53 is an easy-to-use, portable, surface EMG instrument for single site, dual site and ratio (A/B) monitoring. Simple enough for the EMG novice, yet featured for the most demanding practitioner. It provides both easy-to-understand patient feedback and useful statistical information.

Its BUILT-IN MICROPROCESSOR provides statistical information for most clinical and research applications -- without the size, cost and complexity of fully-computerized systems. And, with no software to learn, you can use the AT53 EMG the day you receive it. Technology that WORKS FOR YOU.

Patient Oriented Feedback

The most important aspect of EMG feedback is the QUALITY OF INFORMATION it provides.

Audio: The AT53 EMG uses a speaker (not a tiny piezoelectric crystal) for clear, easy-to-understand audio feedback. Your patients can easily hear the changes in their EMG activity.

Audio feedback selections for each channel include: 1) piano, 2) continuous, 3) clicks, and 4) raw signal. Feedback can be provided continuously, above threshold or below threshold.

Visual: Two bright, LED numerical and two fifteen segment lightbar displays provide easy-to-see visual feedback for each channel. The autoranging numerical display automatically displays the full range of EMG activity from 0.01 to 999 ÁV, without manual range adjustment.

TPI: Additionally, you can select whether the numeric display provides real-time---or time period averaged feedback every 1, 2, 4, 10 or 60 seconds---making the trend of muscle activity CLEARER TO THE PATIENT.

Portable. Both battery and line-powered. Complete with all accessories, including a carrying case.

Advanced Feedback Features

SUSTAINED EMG ACTIVITY provides audio feedback when EMG activity is sustained above the threshold for a user-selectable time period.

LAST VALUE ATTAINED (LVA) continuously updates and displays the maximum or minimum EMG value attained (as a target for patient motivation) while the lightbar provides real-time EMG feedback to the patient.

Statistical Capabilities

The AT53 EMG provides both summary and intra-session statistics for the mean, max., min., SD, %SD and the %Time > or < Threshold. Simply press a Statistics button to collect or display this USEFUL DATA.


The AT53 EMG is designed to meet/exceed the electrical and safety standards specified by UL 2601, IEC 601 and CSA 871. The default parameters are bolded.


Two Independent Channels A only, B only, A/B (ratio), A+B Simultaneously
Home-Use Software Lockout Enabled, Disabled
Visual Feedback -- Per Channel
Display Options Numerical LED + Lightbar, Lightbar only, Numerical LED only
Numerical LED Displays Three red digits, 0.5" high
Numerical LED Range 0.01 - 999 ÁV, auto-ranging
TPI (Time Period Integration) Settings 0.5, 1.0, 2.0, 4.0, 6.0, 10.0, 60.0 seconds
LVA (Last Value Attained) Settings Continuous, Maximum, Minimum
Lightbar Range 15 segments, Logarithmic scale corresponding to threshold setting
Audio Feedback -- Per Channel
Tones Piano, Continuous, Clicks, Raw
Volume Levels 0 to 7, 4 is the default
Audio Provided Continuously, Above or Below Threshold, After 3 or 5 seconds
Statistics -- Per Channel
Statistics Acquired (Summary) Min., Max., Mean, SD, %SD, %Time> or <Threshold
Statistics Acquired (Intra-Stats) Choice of Min., Max., Mean, SD, %SD, %Time> or <Threshold
Sampling Capacity 30 to 300 minutes of data (depending on the sampling rate)
Intra-Session Data Collection Rate 0.5, 1.0, 2.5 or 5.0 minutes
Data Display Rate 2.5 seconds
4 Hz (every 0.25 seconds) of VRMS
Electrical -- Per Channel
Resolution 0.10 ÁV
Bandpass 25-425 Hz
Bandpass Rolloff 18 dB per octave
Common Mode Rejection 120 dB
Notch Filter 60 Hz, 25 dB, (50 Hz option)
Differential Input Impedance & Input Noise > 1,000,000 megohms; 0.3 ÁV
Leakage Current In compliance with UL 2601 specifications
Audio Output 3.5 mm stereo earphone jack, (mono output)
Analog Output Linear 0-3 volt DC signal, compatible with most computer interfaces
Line Power Input 120 volt, 60 HZ, 220 volt, 50/60 Hz
Battery Longevity Rating 10 to 12 hours continuous use
Battery Recharge 16 hours maximum with built-in overcharge protection
Dimensions & Weight 2.5"H x 7.7"W x 5.3"D; 1 pound 11 ounces


Qty Item
(1) UL listed isolation adapter
(4) Installed Ni-Cad rechargeable batteries
(2) 6-foot EMG sensor cable
(1) Leather strap for ambulatory use
(50) Quick-Stick pre-gelled, disposable EMG electrode sets
(1) Top cover instruction label
(1) Carrying case
(1) Owners manual
Warranty: 1 year parts and labor on instrument; 90 days on accessories, 3 year extended warranty available.

Indications: EMG feedback is indicated where general relaxation training or neuro muscular re-education is desired.

Contraindications: There are no known contraindications with the AT53 EMG for the purpose of general relaxation training or neuromuscular re-education.

NOTE: No warranty or claim is made regarding the efficacy of products in clinical use, but only with regard to electronic specifications,
which specifications are subject to change without notice.

NOTE: Federal Law (USA) restricts this device to sale by or on the order of a physician or other health practitioner licensed by the state.

Prices and specifications subject to change without notice.

Other Products: AT33 Portable Single-Channel EMG

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