Welch Allyn 420

Model: 420

Taking vital signs just got easier with the Welch Allyn Spot Vital Signs, the first ever hospital-grade, automated, multi-parameter device created specifically to spot-check vital signs. The Spot Vital Signs offers measurements that are quick, easy, affordable, and accurate; lightweight portability; and a variety of mounting options to meet your needs. The base unit measures blood pressure and heart rate, with Nellcor Pulse Oximetry.   Welch Allyn 420 Spot Vital Signs Monitor – 42N0B; With Blood pressure and Nellcor Pulse Oximetry

Vital signs in seconds with hospital-grade technology Easy to use, accurate and affordable. Measures noninvasive blood pressure (NIBP), pulse rate, and SpO2 IR Connectivity to Electronic Medical Records

Lightweight and portable with a variety of mounting options

All configurations include NIBP, pulse rate and MAP

Nellcor pulse oximetry Standard non-invasive blood pressure (NIBP) as well as pulse rate. Large LCD display with backlight.

Extremely user-friendly and easy to use

Lightweight and portable: Weighs just 4.5 pounds

Uses the oscillometric method to determine systolic and diastolic pressure and pulse rate.

Noninvasive Blood Pressure (NIBP)
Cuff Pressure Range 0 to 300 mmHg
Initial Cuff Inflation  160 mmHg (adjustable)
Systolic Range 60 to 250 mmHg
Diastolic Range 30 to 160 mmHg


Performance Measurement Range 70% to 100%
Pulse Rate Range 25 to 240 bpm


Dimensions: 9.70″(24.64cm) x 5.72″ (14.53cm) x 4.73″ (12.01cm)
Weight: 4.5 lbs (2.04 kg)

Blood Pressure Accuracy: Meets or exceeds SP1–1992 AAMI Standards.