Exceptionally compact, lightweight, and designed for the way you work, the 504DX series offers advanced DOX™ pulse oximetry and heart rate monitoring, plus the reliability and ease of use that have put Criticare monitors in a class by themselves.

Ergonomic design and intuitive operations. Unique DOX™ digital SpO2 technology improves performance, even under the most challenging clinical conditions. Full-featured audible and visual alarms ensure accurate extended, unattended monitoring. The optional fully-integrated, internal printer produces high quality hard copies of graphic trends, tabular trends, and sleep summary reports. Sleep summary reports can be used to detect sleep apnea and requires no additional software. For additional analysis, the 504DX series is compatible with Profox* Oximetry sleep study software.


  • Advanced DOX™ SpO2 and Heart Rate monitoring—from routine, periodic spot-check measurements—to extended, continuous monitoring.
  • With just one compact, lightweight, portable monitor, accommodate all of your patients—from neonate to adult.
  • Unique DOX™ digital SpO2 technology for improved pulse recognition and artifact rejection.
  • Audible and visual alarms provide instant notification.
  • Optional printer, with user-definable report formats, enables accurate documentation of SpO2 and heart rate—short term or overnight—for graphic, tabular, and sleep summary reports.
  • 24-hour internal memory supports Profox* Oximetry sleep study software.
  • Built-in, rechargeable sealed lead acid battery ensures uninterrupted operation throughout patient transport or during power failure.

Pulse Oximetry
Range: 0% to 99%
Resolution: 1%
Accuracy: 70% to 99% range: ±2%; 40% to 69% range: ±3%; <40%: unspecified
Method: Dual wavelength LED

Heart (Pulse) Rate
Range: 20 to 300bpm
Resolution: 1bpm
Accuracy: ±1bpm or ±1%, whichever is greater

Physiological/System: Audible; visual (EN475); adjustable volume
Silence: Yes; Temporary (2 min) or Permanent
Parameter/Range/ Default:

  • High Saturation: 70% to 98% or Off; Off
  • Low Saturation: 30% to 99% or Off; 85%
  • High Pulse: 80 to 250bpm or Off; 150bpm
  • Low Pulse: 20 to 150bpm or Off; 50bpm

Type: LED
Parameters: SpO2; pulse rate; pulse bar
Status: Alarm Silence; Sensor; Low Battery; External Power; Neonatal Mode
Text: Alphanumeric LCD
Languages: Selectable; English, French, German, Italian, Portuguese, Spanish

Data Storage
Capacity: 24 hr at 4 sec intervals

System Output

Com Port: RS 232-compatible; digital or analog; mini-din
Serial Interfaces: ASCII, text, or CSV; Profox-compatible

Type: Thermal line printer; optional
Tabular Mode: 5, 15, 30 sec intervals; 1, 2, 3, 5, 10, 15, 30, 60 min intervals; Off
Graphical Mode:

  • Resolution: 5, 15, 30 sec; 1, 2 min
  • Span: 1, 4, 8, 12, 24 hr

Weight: With printer and battery: 1.52kg; 3.34 lb
Size: Base unit: 14.4cm (H) x 17.8cm (W) x 12.2cm (D); 5.67" (H) x 7" (W) x 4.81" (D)

Power Requirements
Voltage: 50 Hz: 220/240 VAC; 60 Hz: 110/120 VAC
Battery: Sealed lead acid; life: 6 hr, typical; recharge time: 8 hr

Operating Temperature: 0º to 45º C; 32º to 113º F
Storage Temperature: -5º to 55º C; 23º to 131º F
Operating Humidity: 15% to 90%, noncondensing