Compumedics · sleep diagnostics
Sleep studies: PSG, home PSG and screening
From sleep centre to home measurement: polysomnography, home sleep tests and analysis in one environment. For sleep centres, pulmonologists, clinical neurophysiology departments and ENT specialists, with Dutch-language patient instructions and support.
Sleep EEG alongside your EEG systems in the clinical neurophysiology department? See Neurology.

Sleep: choose what you want to measure
For each application you can see which system we advise and why. If you are unsure, we will look at your practice together.
Polysomnography at the sleep centre
A full study at the sleep centre, scored in a single software environment.
Home measurements: Falcon PSG and Falcon HST
Falcon PSG records more channels than Falcon HST (home sleep test) and is intended for adults without significant comorbidity. Falcon HST is a simpler home measurement.
Screening for sleep apnoea
Simple home measurements when sleep apnoea is suspected, for pulmonologists and ENT specialists. The sleep physician reviews the measurement.
Sleep studies in children
We discuss with you beforehand which system and sensors are suitable for children. Falcon PSG is not intended for newborns, infants or children.
CPAP titration
Titration at the sleep centre, next to the diagnostic night.
Systems
Three systems, one software environment
Polysomnography at the sleep centre, home measurements with Falcon or with a sensor on the forehead (Somfit). You can review all measurements in the Profusion environment from Compumedics.

Grael 4K PSG:EEG
Polysomnography at the sleep centre, with EEG, respiration and other channels for a full study.
View specifications
Falcon PSG and HST
Falcon PSG for a full recording in adults without significant comorbidity, Falcon HST for a simpler home test. With single-use or reusable sensors.
View specifications
Somfit
VCM supplies Somfit, Somfit Pro and Somfit D. Somfit D is the single-use variant. With Dutch patient instructions.
View specificationsProfusion Sleep
Scoring, reporting and archiving, for lab and home measurements.
View softwareSide by side
Falcon PSG, Falcon HST and Somfit compared
A short summary. We discuss which system suits your patients before you order.
| System | Patient and indication | Where used | Channels | What is measured | Who applies the sensors | Software |
|---|---|---|---|---|---|---|
| Falcon PSG | Adults without significant comorbidity. Not for newborns, infants or children. | At home, in hospital or another environment, under the direction of a physician, technologist or clinician | 6 differential and 10 referential channels, plus 1 pressure channel and 2 inductive bands | EEG, EOG, EMG and ECG, airflow, respiratory effort (thorax and abdomen), position, sound and saturation | The patient or a healthcare professional | Profusion Sleep from version 5.1 |
| Falcon HST | Indication and patient group: see the manufacturer’s instructions for use. We discuss them with you beforehand. | At home | 2 high-speed channels and 1 AUX channel, plus ECG, pressure and 2 inductive bands | EEG, EOG or EMG (2 channels), ECG, pressure-based airflow, respiratory effort (thorax and abdomen), position and movement, saturation | The patient | Profusion Sleep 5 (Falcon HST Edition) or neXus 360 |
| Somfit | Suspected sleep apnoea (one night), or insomnia or a circadian rhythm disorder (7 nights) | At home | EEG 1, EMG 1 and EOG 2. Not a full polysomnography. | EEG, EOG and EMG, oxygen saturation, pulse rate, peripheral arterial tone, movement, snoring, ambient light and head position, with an automatic hypnogram | The patient, with a self-adhesive electrode on the forehead | neXus 360 and ProDigi PSG |
| Somfit Pro | Suspected sleep apnoea (one night) | At home | As Somfit, plus the Respifit module | As Somfit, plus airflow, thoracic effort and body position. Optional ECG (1 channel) and abdominal effort. | The patient | neXus 360 and ProDigi PSG |
| Somfit D | Suspected sleep apnoea (one night) | At home | As Somfit | As Somfit, in a single-use version: no return shipment, cleaning or charging | The patient | neXus 360 and ProDigi PSG |
Somfit is not a full polysomnography: it measures 1 EEG channel, 1 EMG channel and 2 EOG channels. Falcon PSG records 6 differential and 10 referential channels. With Somfit the sleep physician reviews the measurement. Whether a system suits your patient group is stated in the manufacturer’s instructions for use; we discuss this with you beforehand.
Specifications
Falcon PSG, Falcon HST and Somfit in numbers
We agree the right version and what is available in your region before you order.
Falcon PSG



- Type
- Recorder for sleep studies, at home, in hospital or another environment, under the direction and supervision of a physician, technologist or clinician. The patient or a healthcare professional can apply it.
- Patient group
- Intended for adults without significant comorbidity. According to the user guide (1.4) this includes significant cardiorespiratory disease, possible respiratory muscle weakness due to a neuromuscular condition, awake hypoventilation or suspected sleep-related hypoventilation, chronic opioid use, a history of stroke and severe insomnia. Not intended for newborns, infants or children, and not for use as life support equipment or for vital signs monitoring in intensive care.
- Channels
- 6 differential and 10 referential channels for EEG, EOG, EMG and ECG, 512 Hz, 24 bit. Also 1 pressure channel for airflow, thoracic and abdominal bands (inductance plethysmography), built-in position and sound sensors and a Bluetooth oximeter.
- Signal
- Input noise 7 µVpp, CMRR above 100 dB, input range ±400 mV, frequency range 0.5 to 30 Hz. ECG for visual review only, without heart rate calculation.
- Power
- 3.7 V Li-ion battery. Charging and download through the cradle with USB-C.
- Standards
- According to the manufacturer’s instructions for use: class II, type BF applied parts, IP22, tested to IEC 60601-1, -1-2, -1-11, -2-26 and IEC 62133-2.
- Software
- Profusion Sleep from version 5.1 (USB).
- Documents
- The Falcon PSG is new. Contact us for the current regulatory status and the documents that are available. Contact us.
Falcon HST



- Type
- Home sleep recorder, applied by the patient. Simpler than the Falcon PSG: 2 high-speed channels and 1 AUX channel. According to the manufacturer the results meet the definitions of the AASM (the American Academy of Sleep Medicine).
- Channels
- 2 high-speed channels (EEG, EOG or EMG), 1 AUX channel, ECG, pressure-based airflow, thoracic and abdominal bands (inductance plethysmography), 3-axis position and movement sensor and a Bluetooth wrist oximeter.
- Recording
- Rechargeable Li-ion battery, 12 hours of recording according to the manufacturer. 4 GB of storage in the device.
- Connectivity
- Bluetooth 5.2, docking station for charging and data transfer, colour touchscreen.
- Size
- 82.5 × 58.5 mm
- Software
- Profusion Sleep 5 (Falcon HST Edition), or neXus 360 in your own network.
Somfit, Somfit Pro and Somfit D
- Variants
- VCM supplies Somfit, Somfit Pro and Somfit D. Somfit D is the single-use version: no return shipment, cleaning or charging.
- Type
- Wearable device with a self-adhesive gel electrode on the forehead and a phone app (Bluetooth). No wires.
- Signals
- 1 channel EEG, 1 channel EMG and 2 channels EOG, oxygen saturation, pulse rate, peripheral arterial tone, movement, snoring, ambient light and head position, with an automatic hypnogram. Somfit is not a full polysomnography.
- Somfit Pro
- Somfit with the Respifit module: airflow, thoracic effort and body position. Optional ECG and abdominal effort.
- Use
- One night when sleep apnoea is suspected. Somfit (not the D) also for 7 nights in insomnia or a circadian rhythm disorder. Reviewed by the sleep physician.
- Software
- Profusion neXus 360 and ProDigi PSG for scoring and reporting.
- Documents
- Documents, such as the declaration of conformity (DoC) of a system, are available on request. Contact us.
Grael 4K PSG:EEG and Profusion Sleep
- Channels
- 32 referential and 16 differential channels, 2 RIP channels, pressure, airflow, position, microphone, light and oximeter. 24 bit, sampled at 16,384 Hz, storage from 256 to 4,096 Hz.
- Connection
- One PoE network cable (802.3af) for power and data, with docking cradle. Size 240 × 144 × 50 mm, 700 g.
- Standards
- According to the manufacturer’s instructions for use: CF patient connections to IEC 60601-1 and IEC 60601-2-26. According to the manufacturer it meets the digital specifications of the AASM (the American Academy of Sleep Medicine).
- Profusion Sleep
- Version 5.1. Scoring to the AASM rules (American scoring rules, version 2.6), automatic and manual, with MSLT, CAP scoring, CPAP titration (Decision Assist) and two HD cameras.
- Connectivity
- PSG Online connects to neXus 360 for remote review in a browser. At VCM customers neXus 360 runs on a server in their own network, with HL7 to the electronic health record (EHR).

Software
Scoring, reporting and connection
Profusion Sleep for lab and home measurements.
- Scoring
- Scoring according to the AASM rules (American scoring rules)
- Studies
- PSG, home PSG and HST, MSLT and CPAP titration
- Reporting and export
- Report templates and export to EDF
- Connection
- We connect to your hospital’s EHR and archive. We discuss beforehand which interfaces are possible, set them up together with your IT team and test them before delivery.
- Archive
- neXus 360 runs on a server in your own hospital network
In Dutch
Patient instructions in Dutch
Dutch patient instructions for the home measurement. That way the patient knows what to do at home. Whether a patient applies the sensor themselves depends on the system and the instruction.
- Installation and trainingOn site, with your team
- Remote supportVia VPN or TeamViewer, in the way your hospital allows
Service
Service for your sleep system
Inspection according to NEN-EN-IEC 62353 and preventive maintenance by VCM, reporting faults and a service contract: Basic, Plus and Premium, or tailor-made. Our technicians are trained on the systems we supply. Which sleep systems from other brands we maintain, we decide per request.
Webshop
Sensors and consumables for sleep studies
Search by your system or by the article number you use now. The webshop shows professional articles after logging in with a business account.
You clean and disinfect reusable sensors according to the manufacturer’s instructions for use (IFU). Which nasal pressure cannulas, snore microphones and position sensors we supply is shown in the webshop, or ask us. You will find consumables for older Compumedics sleep systems via Find by your device.
From the knowledge base
All articles on sleepDemo and trial placement
Expanding your sleep centre or starting home measurements?
We help you think about setup, planning and trial measurements.





