Welch Allyn Atlas

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Pricing up to 50% below the cost of new,
with service and warranty included.
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Welch Allyn Atlas Patient Monitor Features

The Welch Allyn Atlas is a portable patient monitor that can easily go anywhere with the patient. The Atlas can be used as a countertop monitor, put on a mobile stand, or mounted to a wall. The monitor offers a large display. The large, bright display can easily be seen from across the room. The Welch Allyn patient monitor offers multi-parameter monitoring with 3-lead, and 5-lead ECG, heart rate, pulse rate, pulse oximetry, and blood pressure readings. The monitor offers a battery for short-term transport or low-power conditions. The Atlas was designed to be for conscious sedation, anesthesia procedures, and surgery.

  • Easy to use and can be configured to fit your needs
  • Multiparameter monitor including, 3-5 lead ECG, SpO2, NIBP, and heart rate
  • LED Display that is bright and can be seen across the room
  • Simple, straightforward menu operation

Welch Allyn Atlas Specifications


  • Height: 8.75 in (23 cm)
  • Width: 13 in (33 cm)
  • Depth: 9.5 in (24 cm)
  • Weight: 9.5 lb (4.3 kg)


  • Display Type: Cathode Ray Tube / LED
  • Display Size: 10.8 in x 4.9 in (275 mm x 125 mm)
  • Screen Display (numeric):
    • Heart Rate (ECG)
    • MAP (mean arterial pressure)
    • Respiration Rate (impedance respiration, models 622xx and 623xx)
    • Respiration Rate (ETCO2, model 623xx only) CO2 concentration (model 623xx only)
  • Screen Display (waveform)
    • ECG – one line, or cascading to two lines, with a 1 mV scale bar on the first line
    • SpO2 Impedance Respiration (models 622xx and 623xx)
    • ETCO2 (model 623xx)
  • Numeric Display:
    • 3-digit green LED: Pulse
    • 3 digit red LED: Systolic
    • 3 digit red LED: Diastolic
    • 2-digit red LED: SpO2%
    • 4-digit green LED: Temperature (models 622xx and 623xx)
  • Trend Data:
    • Date/Time, Heart Rate, Systolic, Diastolic, MAP, SpO2
    • Respiration Rate, Temperature (models 622xx and 623xx)
    • CO2 concentration (model 623xx)
  • Trend Sampling: Sample at every BP cycle, or every 15 minutes
  • Trend Capacity: 144 samples, maximum time span 36 hours


  • Power Voltage: 100 to 240 VAC
  • Power Frequency: 50-60 Hz
  • Power Current: 1 A

Storage and Operation Conditions

  • Storage Temperature: -20° to 50° C
  • Storage Humidity: 15 to 95% non-condensing
  • Storage Altitude: -170 to 1700 meters
  • Operating Temperature: 10° to 40° C
  • Operating Humidity: 15 to 90% non-condensing
  • Operating Altitude: -170 to 17000 meters


  • AlarmRange:
    • Systolic Low Limits: 60 – 245 mmHg
    • Systolic High Limits: 65 – 250 mmHg
    • Diastolic Low Limits: 30 – 150 mmHg
    • Diastolic High Limits: 35 – 155 mmHg
    • MAP Low Limits: 45 – 185 mmHg
    • MAP High Limits 50 – 190 mmHg
  • Initial Cuff Pressure: 120, 140, 160, 180, 200, 240, 280 mmHg – user selectable
  • Repeated Cuff Pressure: Previous Systolic pressure + 40 mmHg
  • Maximum Inflation time: 3 minutes (typical:< 40 seconds)
  • Inflation Over-Preeure Dump: <3000 mmHg
  • Inflation Over-Pressure Dump backup”: <330 mmHg


  • Heart Rate Range: 21 to 249 beats/minute
  • Heart Rate Accuracy: ±3 beats/minute or ±3% whichever is greater
  • Bandwidth, Normal Mode: 0.5 to 40 z
  • Bandwidth, Extended Mode: 0.05 to 100 Hz
  • Leads: 3-wire to 5-wire, available in AHA or IEC colors
  • Connectors: AAMI 6 pin
  • Electrodes: Disposable snap electrodes
  • Display Sweep Speeds: 6.25, 12.5, 25 mm/second
  • Gain: 10 mm/mV, and automatic gain with visual scale indicator
  • Scale Reference Bar: A fixed 1 mV reference bar is displayed with the top ECG waveform for scaling the waveform. This is provided in place of a standardizing voltage.
  • Lead Display: Single, user selectable: I, II, III; or I, II, III, aVR, aVL, aVF, V
  • Heart Rate Display: numeric
  • Waveform Display: One or two rows (cascading) of ECG waveform display
  • Leads Off Condition: Detected and displayed (selected lead only)
  • Alarms: High and Low Heart Rate
  • Alarm Ranges
    • Heart Rate Low Limits: 21 to 245 beats/minute
    • Heart Rate High Limits: 25 to 249 beats/minute
    • Pulse Tone: Constant frequency, ECG used alone; Synchronized to SpO2 pulse tone, ECG and SpO2 used together, frequency varies with perfusion
    • Input Impedance >2.5 Megohms at 10Hz

Refurbished Welch Allyn Atlas Monitor

Soma Tech Intl offers a Refurbished Welch Allyn Atlas Monitor System up to 50% below OEM prices with the same service and warranty as new. The Welch Allyn Monitor is not only technically refurbished but also cosmetically refurbished to make it work and look like new. When the refurbishing process starts on the Welch Allyn, it is carefully inspected and tested by our own in-house biomedical engineers who are highly skilled and certified to work on patient monitors. If necessary, parts are replaced to make sure that all aspects of the monitor are functioning properly. Once everything is in working order, the unit is calibrated back to the original engineering manufacturer’s specifications. This ensures that the unit is working the same way that it originally left the manufacturer. After the Welch Allyn system is working like new it undergoes a special cosmetic restoration process. The Atlas Monitor is cleaned, minor scratches and dents are repaired, it’s painted, and new decals are replaced if necessary. After this strenuous refurbishing process, the unit functions and looks new. Soma Tech Intl is ISO 13485 certified and ensures that the best quality is given to all capital medical equipment that they sell. Before the Welch Allyn Monitor is labeled patient-ready and packed up for shipment, it goes through one last quality control test that makes sure all aspects are again working as they should. If you are looking to buy refurbished Welch Allyn AtlasMonitor Systems contact soma at [email protected] or call us at 1-800-GET-SOMA.

Soma Tech Intl is also actively looking to purchase a Welch Allyn Atlas Monitor. If you or your facility is looking to sell your Monitor, be sure to contact Soma Tech Intl. Soma has a dedicated and experienced purchasing department that helps you through the entire process. Selling your used or pre-owned Welch Allyn Monitor to Soma Tech Intl takes out the middle man in the equation. This also ensures that your medical facility gets top dollar for your equipment. Soma Tech Intl is 100% HIPPA compliant and makes sure that your equipment gets to our facility in the same condition that it left yours. Soma Tech Intl also gives the option for trade-in credit on your medical equipment. If you or your facility is looking to regain floor space for new equipment, or looking to upgrade current equipment, contact Soma Tech Intl’s purchasing department at [email protected] or send us a message on our Sell to Soma website.


Questions about our Patient Monitors?

Soma Tech Intl offers a wide range of patient monitors. If you have any questions about any of our patient monitors or need a quick quote, call us and one of our knowledgeable sales representatives will help you.

Looking to sell your patient monitors? Soma ensures your facility gets top dollar for your equipment and also gives the option for trade-in credit.

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