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SOMNOwatch™ plus - RESEARCH



SOMNOwatch™ plus – Research – Our SOMNOwatch™ plus encases a digital triaxial accelerometer, ambient light sensor and event marker. The AUX input allows to connect extra sensors and modules with up to 8 channels to the base device, giving you various options to design your measurements according to your studies specific needs. Therefore the SOMNOwatch™ plus can become one of the smallest somnographs or respiratory screeners. We also offer longterm blood pressure recording, longterm EEG recording (1 channel or 6 channels) or even long term body core temperature recording. We are even able to design a completely new module for you, combining exisiting sensors to meet your studies requirements. Almost anything is possible – allowing you to gather specific data for your research.


Research Grade Sensors

With programable software allowing extensive customisation

7 Internal Channels

Body position, 3 activity sensors (x, y, z-axis, magnitude), ambient light, patient marker with acoustic tone


High sampling rates

256/32 Hz

Data Compression for long recording times

Allowing up to 25 day study duration (depending on number of sensors attached and sample rate)

Up to 8 External Channels

Blood Pressure, respiratory analysis, 6 channel EEG, long term ear temperature and much much more

Double Plot & Raster View

Over the complete measurement day by day – double plot for improved circadian analysis

Powerful, miniaturised, multi channel recorder

The SOMNOwatch™ plus is a powerful, miniaturised, multi channel recorder which is as comfortable and user-friendly as a watch.

Available Sensors

  • EMG Sensor for PLM recording
  • Flow Sensor (Respiratory analysis: Flow & Snore)
  • 1 channel EEG (Long Term EEG and Sleep Scoring)
  • 1 channel ECG

Available multi-channel modules:

  • Combi-Sensor Flow/Snore + 1 channel ECG
  • 6 channel EEG Headbox (for Long Term EEG and AASM Sleep Scoring)
  • Respiratory Module (Flow, CPAP/BiPAP pressure, Effort Thorax + Abdomen, Snore, SpO2, Pulse Rate, Body Position, Aktigraphy)
  • Blood Pressure Module (Systolic + diastolic Blood Pressure (non-invasive and beat-to-beat), ECG, Oximetry, Aktigraphy, Heart Rate Variability)
  • Body Core Temperature, in ear long term measurement
SOMNOwatch™ plus Technical Highlights

  • High resolution
  • 7 Internal channels
  • High Signal-to-Noise ratio
  • 2 color LED for better communication
  • Piezo tone generator built in (programmable)
  • 64 MB Storage capacity
  • Long recording time (up to 25 days at a 8Hz sample rate)
  • Up to 8 external channels
  • Data Compression Mode

Tremor Analysis

The high frequency acquisition of movement data enables the SOMNOwatch™ plus to make a very accurate frequency analysis using FFT. The recording of tremor intensity and tremor frequency can be achieved over a long period of time. This parameter can be used for the medical diagnosis and treatment of Parkinson’s disease.

Analysis Software

  • Programmable, delayed auto start
  • Spectral Analysis to detect tremor
  • Easy determination of Frequency and Intensity in the Tremor Spectrum
  • Fast results output in a tabular or graphical format
  • Export to Microsoft EXCEL

PLM / RLS Recorder

Applied to the ankle, the SOMNOwatch™ plus can continuously record Leg Movement for up to 5 nights. It can differentiate between the standing and lying position by using the integrated position sensor. With adjustable parameters, the software automatically recognizes PLM movement patterns and evaluates the PLM index. For RLS-rating (Restless Leg Syndrome) the Motor activity is quantified.

For an extended diagnosis the correlation of PLMs and Cortical Micro Arousals can be detected by using the EEG Derivation (optional).

For the detection of PLM on both legs, an external movement sensor can be fixed to the second leg, and work simultaneously with the SOMNOwatch™ plus.

The SOMNOwatch™ Plus is validated for the detection of periodic leg movements*.

*Benes H. at all, Validation of the new actigraphy system SOMNOwatch™ for the measurement of periodic leg movements, 2. Weltkongress der Schlafmedizin (WASM), Bangkok (Thailand), 2007.

Respiratory Analysis with Flow Sensor

  • Flow, Snore, Body Position, Movement & ambient Light
  • also ideal for PAP control measurements

1 channel EEG sensor

  • 1-channel EEG over the full frequency band for easy sleep quantification
  • Automatic sleep profile (hypnogram) with spindle and K-complex detection
  • Movement and body position detection
  • REM via sigma analysis and absence of spindles

Long-Term ECG

SOMNOwatch™ plus can store the raw data from a single channel ECG for up to 250 hours. The correlation between Heart Rate, its Rhythm, Actigraphy and Body Position can give very interesting information for the diagnosis of cardiovascular diseases and help in patients rehabilitation.

  • 1-Channel ECG
  • Recognition of Brady-/Tachycardia and Arrhythmia
  • Heart Rate Variability (HRV) at a sampling rate of 128/
  • Sympatho-Vagal Balance (SVB)

Combi-Sensor Flow/Snore + 1 channel ECG

Specifically designed for a cohort study in Germany

Respiratory Module

  • Flow (nasal cannula)
  • Efforts Thorax & Abdomen
  • Snore
  • SpO2, Pulse Rate
  • Body Position
  • Movement (Sleep /Wake estimation)
  • CPAP / BiPAP Pressure
  • Ambient Light (Time in Bed)
  • Patient marker

Allows a full respiratory screeing in a miniaturised device.

Reports: Sleep/Wake Report, SpO2 Report, Respiratory Report, Snoring Report

6 Channel EEG Head Box

  • 6 EEG + 1 EMG/ECG
  • Impendance check with colour coded lights
  • Continuous impedance recording
  • up to 50 hour recording duration
  • ECG elimination
  • Accoustic replay

Can be used for Long Term EEG or ambulatory Sleep Scoring according to AASM (4 EEG + 2 EOG + 1 EMG)

Continuous Blood Pressure Measurement

With the Blood Pressure Module, you can record simultaneously:

  • Continuous systolic / diastolic blood pressure, based on the Pulse Transit Time (PTT)
  • Long Term ECG (3 channels)
  • Oximetry
  • Actigraphy
  • Heart Rate Variability

Advantages of continuous blood pressure measurement based on the PTT

  • Covers all Max and Min, never miss an event (real max and min)
  • Detection of BP fluctuations during night time *
  • Detection of BP base line shift during REM stage*
  • No patient disturbance during the day or night
  • Minimized deviation caused by Body position changes
  • Fits all sizes, no cuff size selection or disinfection required
  • Correlation with all sleep events

*Gehring, J., Gesche, H., Drewniok, G. et al. Sleep Breath (2018) 22: 337.

How does it work?

SOMNOmedics uses an innovative patented algorithm to measure blood pressure via the Pulse Transit Time (PTT). The PTT is the time required for the pulse wave to propagate along the vessel wall between two defined points. In the case of the SOMNOtouch RESP – From the left ventricle of the heart (defined by the ´R´peak of the ECG) – to the detection of the pulse wave at the finger tip (detected by the plethysmograph).

Taking a one point calibration at the beginning of the sleep study allows us to `set` the software‘s algorithm – and measure blood pressure continuously throughout the measurement. Because every single pulse wave is detected, a continuous “Beat-to-Beat”- recording and analysis is possible. Reduce artifacts and increase the number of reliable data points – all in a continuous, non-invasive and non-reactive way.

Temperature Recording (inner ear)

  • Long time temperature measurement in the ear
  • Comfortable
  • 12 Days Recording Time
  • Correlation to light, motor activity and body postition
  • Determination of rel. Min. and Max

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Please email or talk to one of our international sales advisors on +49 931 35909 40.