ri-fox N Pulse Oximeter

ri-fox N is a pulse oximeter which measures pulse rate (PR) and oxygen saturation (SpO2) in less than 3 seconds. The pulse oximeter easily clips onto the patient’s finger, preferably the index finger. The measurements are easy to read on the LED display screen in both dark and lit settings. This small, mobile device is suitable for use in hospitals, clinics as well as long-term care settings or home.

Pulse oximetry

Pulse oximetry is defined as: A test used to measure the oxygen level (oxygen saturation) of the blood. It is an easy, painless measure of how well oxygen is being sent to parts of your body furthest from your heart, such as the arms and legs. A clip-like device called a probe is placed on a body part, such as a finger. The probe uses light to measure how much oxygen is in the blood. This information helps the healthcare provider decide if a person needs extra oxygen.1

During the COVID-19 pandemic the NHS (National Health Service, UK) noted that low levels of oxygen in your blood can be a sign you're getting worse. A pulse oximeter can help you spot this before you feel breathless or have any other symptoms, so you can get help quickly.2

Image gallery


ri-fox N front view


ri-fox N screen image


ri-fox N side and back view


ri-fox N side view

Features and Benefits

  • A small, mobile device with integrated sensor
  • Simple and fast measurement by attaching to the finger, preferably the index finger
  • Screen displays SpO2 and pulse rate measurements
  • LED screen is visible in both dark and lit rooms
  • The pulse bar graph on the screen visually indicates pulse rate
  • Automatically switches off after 8 seconds to save battery
  • Battery status indicator (top right-hand corner) displays the charge left in the batteries
  • Batteries have a lifetime of approx. 30 hours (in continuous operation)
  • Batteries are simple and quick to change
  • Standard AAA-batteries are included
  • Includes a wrist strap

Product details

ri-fox N

SpO2 measurement range 70% - 100%
SpO2 measurement accuracy 70 % - 100 % ±2 %
<70 % not defined
Pulse rate measurement range 30 - 235 bpm
Pulse rate measurement accuracy 30 - 100 bpm ±2 bpm
101 - 235 bpm ±2 %
Display LED
SpO2, pulse rate, pulse signal, visual indicator for low battery
  Operating temperature 5 °C to 40 °C
  Storage temperature -20 °C to 55 °C
  Operating humidity ≤80 %, non condensing
  Storage humidity ≤93 %, non condensing
Energy supply 2 batteries AAA, alkaline type LR03
Battery life Approx. 30 hours
Dimensions 66 x 39 x 32 mm
Weight 48 g with batteries
Disinfection Surface disinfection

Ordering information

ri-fox N Pulse Oximeter

1905 All ri-fox N Pulse Oximeter


Vital Signs Devices

Riester RVS-200 web
RVS-200 Wall Diagnostic Station

Integrated Modular Wall Diagnostic Station with vital signs monitor and the option to add medical devices

RVS-100 Vital Signs Monitor

RVS-100 Vital Signs Monitor with versatile, intuitive touch screen with Early Warning Scores (EWS) and Bluetooth connectivity 

Where to buy?

Riester products are available in over 150 countries. Enter your country to find a Riester distribution partner near you.


John Hopkins Medicine Website, accessed 06 May 2022


National Health Service Website, accessed 06 May 2022