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A portable cerebral oxygenation monitoring device.



Measures local tissue saturation (TSI), as well as oxy-, deoxy-
and total hemoglobin.

  • Get insight in local cerebral oxygen consumption, blood volume and blood flow.

  • Non-invasive, light, easy and truly portable

  • In the lab and in the field

  • Bluetooth connection (up to 150 meters)

  • On board data collection

  • Superior analysis software, OxySoft

  • Sport science/cerebral studies

  • Possible to combine multiple devices



NIRS made easy


NIRS device

The PortaLite is ideally suited for measurements in the brain during everyday activity. The small and flexible probe is easy to attach and connected with one wire to the portable battery housing. It is a highly portable device and currently one of the smallest and most portable brain oxygenation monitoring devices on the market. Therefore, the PortaLite is utilized in a wide range of applications e.g. functional studies, sports science, and rehabilitation.

The system has three light sources and is therefore capable of measuring tissue saturation index (TSI), which is an absolute measure of oxygenated hemoglobin. Furthermore, the PortaLite uses near-infrared spectroscopy (NIRS) to measure oxy-, deoxy-, and total hemoglobin concentrations at the capillary level. The PortaLite has been used by our customers during dual tasking (Maidan 2015), to detect epileptic seizures (Jeppesen 2014) and to measure the effect of hypoxia while when climbing the highest volcano of the world (Burtscher and Koch 2015). All publications with the PortaLite can be found on our publications page


The PortaLite is an easy to use and truly portable oxygenation monitoring device. With the PortaLite you are enabled to do online measurements using Bluetooth or offline measurements through on-board data collection. This makes it a perfect device for measurements both in the lab and in the field. It has a flexible sensor to fit the curvature of the head or smaller muscles like the intercostal or trapezius muscle to offer even more possibilities.

Before the Portalite was developed, researchers took the OxyMon up to great heights to measure the effect of hypoxia (Rupp 2013) or zero gravity (Brümmer 2011) on the brain; with the introduction of our portable NIRS devices, this can now be done a lot easier, with the same data quality.

The near infrared spectroscopy technique


how it works

Optical oximetry and near-infrared spectroscopy (NIRS) in particular is a tool for assessing the oxygenation status and hemodynamics of various organs, e.g. muscle and brain non-invasively. It relies mainly on two characteristics of human tissue. Firstly, the relative transparency of tissue for light in the NIR range, and secondly on the oxygenation dependent light absorbance of hemoglobin. Read more >

portaLite highlights

  • Virtually no setup time

  • Insert online and offline events.

  • Up to 50 Hz sampling rate

  • 1 channel to measure absolute oxygenated hemoglobin percentage, 3 channels to measure relative concentrations.

  • Light emitting diodes: 3 x 2 wavelengths

  • Wavelengths standard nominal 760 and 850 nm

  • Photodiode with proprietary ambient light protection

  • Bluetooth connection (up to 150 meters) for online measurements

  • Fast charging battery that lasts up to 8 hours on a single charge. Upgradable up to 16 hours.

All specifications

PortaLite mini

The mini variant of PortaLite which is optimised for pediatric research. 


Real-time processing of NIRS data

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All of our devices are bundled with OxySoft. OxySoft is our dedicated software application used to collect, store, view, and analyze all necessary data from the OxyMon. This user-friendly software is developed by Artinis and highly customizable to individual requirements. OxySoft provides in real-time the calculation of oxy-, deoxy-, total hemoglobin and TSI.

PortaLite research package

Designed, produced and manufactured in The Netherlands, EU.

PortaLite package


  • 1x PortaLite (or PortaLite mini)

  • 1x Laptop with pre-installed software

  • 1x Strong and sturdy (micro) Pelicase

  • 1x License key

  • 1x Bluetooth dongle

  • OxySoft, data analysis software

  • Batteries and charger

  • Stickers and bandages

  • Dark cloth/Bandana

  • User Guide