Can’t find what you’re looking for? Please call us at 888-345-4858 for assistance.

Welch Allyn 28600 TM 286 AutoTymp Tympanometric System

In stock
SKU : 71090
MPN : 28600

Includes: Tympanometry Mode, Reflex Mode, and Audiometry Mode; Audiometry Headset (External), Threshold Audiometry Card, Thermal Printer Paper (3 rolls), Ear-Tip Set (#26100); 100-240 V, 50-60 Hz AC, IEC Plug Type-B.

  • Fast detection of middle ear pathologies
  • 226 Hz tympanograms offer summary information
  • Manual and automated audiometry
  • Lightweight and portable Internal printer
  • Acoustic reflex measurements available in 500, 1000, 2000, 4000 Hz frequencies

The Welch Allyn TM 286 AutoTymp is a flexible screener for tympanometry, audiometry, acoustic reflex measurements. It is lightweight, portable, and designed to make detection and documentation of the middle ear pathologies fast and accurate.

QuickMedical SKU 71090
Manufacturer Welch Allyn
Custom Specifications
Tympanometry Mode - Direction of SweepPositive to negative
Reflex Mode - PressureReflex measures are set automatically to pressure at peak compliance with an offset of -20 daPa if peak pressure is negative and +20 daPa if peak pressure is positive
Reflex Mode - Reflex DeterminationCompliance change of 0.05 cm3 or greater
Reflex Mode - Reflex Test Time1 to 12 seconds depending upon the number of ipsilateral test frequencies selected (4 maximum) and intensity required
Reflex Mode - Rise/Fall Time5 to 10 msec
Reflex Mode - Total Harmonic Distortion< 5% for outputs less than 110 dB HL and < 10% at 110 dB HL
Tympanometry Mode - Admittance (Compliance) Range226 Hz: 0.0 to 1.5 cm3 or 0.0 to 3.0 cm3
Tympanometry Mode - Harmonic Distortion< 3%
Tympanometry Mode - Pressure Range+200 to -400 daPa
Tympanometry Mode - Probe Tone226 Hz, ± 2%
Tympanometry Mode - Rate of Sweep600 daPa/sec except near tympanogram peak where sweep rate slows to 200 daPa/sec to provide better definition of peak compliance
Tympanometry Mode - Sound Pressure Level226 Hz: 85.5 dB SPL, ± 2.0 dB, measured in a 2.0 cm3 coupler
Tympanometry Mode - Sound Pressure Level 226 Hz 85.5 dB SPL, ± 2.0 dB, measured in a 2.0 cm3Probe Tone 226 Hz, ± 2%
Tympanometry Mode - Tympanogram Test TimeApproximately 1 second
Reflex Mode - Output LevelsIpsilateral: 500 and 4000 Hz: 80, 90,100 dB HL; 1000 and 2000 Hz: 85, 95, 105 dB HL
Weight5 lbs (2.3 kg)—unit and probe
Audiometry Mode - External Headset Earphones125 Hz: -10 to 50 dB HL; 500 to 4000 Hz: -10 to 90 dB HL; 6000 Hz: -10 to 85 dB HL; 250 and 8000 Hz: 10 to 70 dB HL
Tympanometry Mode - Pressure Accuracy± 10 daPa or ± 15%, whichever is greater
Reflex Mode - Frequencies500, 1000, 2000, and 4000 Hz for ipsilateral stimulation
Audiometry Mode - Accuracy1± 2%
Audiometry Mode - Accuracy2125 to 4000 Hz ± 3 dB; 6000 and 8000 Hz ± 5 dB
Audiometry Mode - ContinuousTone is steady when present bar is depressed
Audiometry Mode - FM (frequency modulated)Tone is frequency modulated at a rate of 5 Hz, ±5%
Audiometry Mode - Frequencies125, 250, 500, 750, 1000, 1500, 2000, 3000, 4000, 6000, 8000 Hz
Audiometry Mode - PulsedTone is pulsed at 2.5/sec (i.e., 200 msec ON, 200 msec OFF)
Power - Line Voltage100 -
Unit of Measure (UOM) EA
Dimensions 4.7" (L) x 12.5" (W) x 14.5" (H)
Country of Origin US
Return Policy

Every effort is made to accurately pack and ship your order. Should you encounter a problem, please follow the instructions below.

The following items have return restrictions or are not returnable:

Special Order Items

Upholstered Items (ie: stools and tables )

Opened or defaced product

Discontinued product

Disposable product

Used instruments

Expired product

Product returned after 30 days of invoice

Products drop-shipped directly from the manufacturer

Freight Damage – Inspect your shipment

Thoroughly inspecting your order is CRITICAL. We recommend you check your order immediately while the driver is present. If there is damage to the packaging or to the internal contents, please have the delivery driver make appropriate notations before signing for the shipment. Promptly notify our returns department of any freight damage. If damage is concealed, you MUST:

1 - Notify us within 48 hours of receipt.

2 - Report damage in writing to

3 - Include pictures and a description of the damage so that we may file the appropriate paperwork.

4 - Retain all original packaging material and packing information to accommodate for possible freight inspection.

Credit for returned goods

In order to receive credit for in stock items shipping from QuickMedical, product(s) must be returned within 30 days of invoice, must be unopened, and in salable condition.

Customer is responsible for return shipping.

Special order items, upholstered items (i.e.: stools and tables), opened or defaced products, discontinued products, used instruments, expired products, and products returned after 30 days of invoice WILL NOT be returnable.

In case of customer error, credit issued for in stock items will be less a 25% restocking and freight costs.

Return policy for non-stock, special order, and or drop shipped items will be subject to the return goods policy of the manufacturer.

All returns must have a Return Goods Authorization number clearly identified on the shipment. All items returned in any other manner will not be processed.

Please email or dial 888-345-4858 should you have questions about a return or to obtain a Return Goods Authorization number.


All products are new and warranted by the manufacturer. If you need specific product warranty information, call QuickMedical at 888-345-4858.

© 2021 QuickMedical. All Rights Reserved.