Model 3231 USB Specifications

Oxygen Saturation Display Range: 0% to 100% SpO2
Pulse Rate Display Range: 18 to 321 beats per minute (BPM)
Declared Accuracy*: The table below shows Arms values measured using the Model 3231 in a clinical study.

Range Specified Oxygen Saturation (Arms) Finger Oxygen Saturation (Arms) Thumb Oxygen Saturation (Arms) Low Perfusion Oxygen Saturation (Arms)
70 – 100% ±2 ± 1.31 ± 1.56 ±2
70 – 80% ±2 ± 1.65 ± 1.91 ±2
80 – 90% ±2 ± 1.05 ± 1.21 ±2
90 – 100% ±2 ± 1.18 ± 1.49 ±2


This graph shows plots of
the error (SpO2 – SaO2) by
SaO2 using the 3231 with a
linear regression fit and
upper 95% and lower 95%
limits of agreement. Each
sample data point is
identified by subject from a
clinical study in non-motion
conditions.

Pulse Rate Declared Accuracy Range (Arms)*: 20 to 250 BPM ±3 digits
Low Perfusion Pulse Rate Declared Accuracy Range (Arms)*: 40 to 240 BPM ±3 digits
Measurement Wavelengths and Output Power**:
Red. 660 nanometers @ 0.8 mW max. average
Infrared. 910 nanometers @ 1.2 mW max. average

Temperature:
Operating. -5 °C to 40 °C / 23 °F to 104 °F
Storage/Transportation. -40 °C to 70 °C / -40 °F to 158 °F
Device temperature will not exceed 41 °C as measured during a controlled
environment test.

Humidity:
Operating. 10% to 95% non-condensing
Storage/Transportation. 10% to 95% non-condensing

Altitude:
Operating. Up to 5,000 meters / 16,404 feet
Hyperbaric Pressure. Up to 4 atmospheres

Weight: < 72 g / 2.5 oz., including cable and connector

Classifications per IEC 60601-1 / CAN/CSA-C22.2 No. 601.1/ UL 60601-1:
Degree of Protection: Type BF-Applied Part
Enclosure Degree of Ingress Protection: IP32
Mode of Operation: Continuous

* ±1 Arms represents approximately 68% of measurements.
** This information is especially useful for clinicians performing photodynamic therapy.

This product complies with ISO 10993-1, Biological evaluation of medical devices – Part 1: Evaluation and testing.
This device is not made with natural rubber latex.
This product complies with RoHS.
This product complies with REACH.