Philips Avalon FM50

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Philips FM50 M2705a Features

The Philips Avalon FM50 fetal/maternal monitors offer a solution for both external and internal fetal monitoring applications and optional non-invasive maternal vital signs. The Philips Avalon FM50 can monitor fetal heart rates (FHRs) externally using ultrasound, and uterine activity using a toco transducer. The Maternal heart rate (MHR) is measured using ECG electrodes. This Philips fetal monitor can also measure Non-Invasive Blood Pressure (NIBP) and maternal oxygen saturation (SpO2). Additionally, the Philips Avalon FM50 fetal monitorcan monitor one FHR internally via direct fetal electrocardiogram (DECG), and uterine activity internally using an intra-uterine pressure (IUP) catheter. This fetal monitor is capable of intrapartum monitoring.

The measurements are displayed on a 6.5-inch color display as numerics. You can operate the Philips Avalon FM50 using the touchscreen interface. Measurements are recorded and can be printed out via the onboard recorder.

This fetal monitor is compatible with the Avalon CTS Cordless Fetal Transducer System. Only one CTS Cordless Fetal Transducer system can be connected at a time. The user has the option to either use wired or cordless fetal transducers. Using both wired and wireless together is not supported in this unit. Cordless transducers have priority over wired transducers. When an Avalon CTS base station is connected via the appropriate interface cable, and there are wired transducers connected, the wired transducers are disabled.

  • Automated coincidence detection with Smart Pulse.
  • The Optional external touch display allows very flexible and ergonomic installations.
  • The Avalon FM series monitors can monitor triplets on a single monitor.
  • Crisp and clear intuitive color touchscreen with large numerics and graphics.
  • Remote display option, including touchscreen capability, for added convenience and safety.
  • Backup memory for seamless monitoring.
  • LAN interface for compatibility with hospital IT networks and access to additional system capabilities.
  • Smart transducers with auto-recognition simplify operation.
  • Transducer plug and play with automatic screen layout to focus on the patient, not the system.
  • Data buffer with multi-patient handling for random printout.
  • Cross-channel verification of maternal and fetal heart rates.


Philips Avalon Specifications


Philips Avalon FM50 Dimensions

  • Height: 6.8″ (17.2 cm) ±5%
  • Width: 16.5″ (42 cm) ±5%
  • Depth: 14.6″ (37 cm) ±5%
  • Weight: 19.8 lbs (9 kg)

Philips Avalon FM50 Power

  • Supply Voltages: 100 VAC to 240 VAC ±10%
  • Supply Frequency Range: 50 Hz/ 50 Hz
  • Power Consumption (Current): 1.3-0.7 A

Degree of Protection Against Electrical Shock

  • Type CF

Philips Avalon FM50 Electrical Class

  • Class I Equipment

FM50 Mode of Operation

  • Continuous Operation

Startup Time

  • Continuous Operation

Temperature Range


  • 32°F to 113°F (0°C to 45°C)


  • -4°F to 140°F (-20°C to 60°C)

Humidity Range


  • < 95% relative humidity @ 40°C/104°F


  • < 90% relative humidity @ 60°C/140°F

Altitude Range


  • -500 to 3000 m/-1640 to 9840 ft


  • -500 to 13100 m/-1640 to 43000 ft.


FM50 Performance Specifications



  • Measurement Method: Ultrasound Pulsed Doppler
  • Measurement Range (US): 50 to 240 bpm
  • Resolution
    • Display: 1 bpm
    • Printer: 1/4 bpm
  • Jitter @ 200 bpm: = 2 bpm
  • Display Update Rage: 1/second
  • US Intensity
    • Average output power: P = (4.3 ± 0.4) mW
    • Peak-negative acoustic pressure: p_ = (33.9 ± 3.6) kPa
    • Output beam intensity (Iob) (= spatial average – temporal average intensity): Isata = (2.38 ± 0.75) mW/cm2
    • Spatial-peak temporal average intensity: Ispta = (10.3 ± 2.2) mW/cm2
    • Effective radiating area @ -6 dB: 1.81 cm2
  • Signal Quality Indication
    • Poor: Empty
    • Acceptable: Two-thirds full
    • Good: Full
  • Beat to Beat Change (max.) for Ultrasound: 28 bpm
  • US Frequency: 1 MHz ± 100 Hz
  • US Signal Range: 3.5 µVpp to 350 µVpp @ 200 Hz
  • US Burst
    • Repetition Rate: 3.0 kHz
    • Duration: = 100 µs
  • US LF Frequency Passband @ -3dB: 100 to 500 Hz ± 20%
  • FMP Signal Range @ 33 Hz: 200 µVpp to 40 mVpp
  • FMP Frequency Passband @ -3dB: 10 to 100 Hz


  • Measurement Method: Strain Gauge Sensor Element
  • Sensitivity: 1 unit = 2.5 g
  • Resolution
    • Display: 1 unit
    • Printer: 1/4 unit
  • Measurement Range: 400 units
  • Signal Range: 0 to 127 Units
  • Maximum Offset Range: -300 units
  • Baseline Setting: 20 units
  • Update Rate
    • Display: 1 / second
    • Printer: ~4 / seconds
  • Auto Offset Correction: 3 seconds after connecting the transducer, the TOCO value is set to 20 units.
  • Auto Zero Adjust: TOCO value is set to zero following a negative measurement value for 5 seconds.


  • Measurement Method: Passive Resistive Strain Gauge Elements
  • Measurement Range: -100 to +300 mmHg
  • Signal Range: -99 to 127 mmHg
  • Resolution
    • Display: 1 mmHg
    • Printer: 1/4 mmHg
  • Sensitivity: 5 µV/V/mmHg
  • Offset Compensation: +100 to -200 mmHg
  • Baseline Setting: 0 mmHg
  • Accuracy (not including sensor accuracy): ± 0.5% per 100 mmHg
  • Update Rate
    • Display: 1 / second
    • Printer: ~4 / seconds
  • Auto Offset Correction: 3 seconds after connecting the transducer, the IUP value is set to 0 mmHg


  • DECG: Single Lead ECG (derived from Fetal Scalp Electrode)
  • MECG: Single Lead ECG (derived from RA and LA electrodes)
  • Measurement Range: 30 to 240 bpm
  • Display Resolution: 1 bpm
  • Recorder Resolution: 1/4 bpm
  • Accuracy: ± 1 bpm or 1%, whichever is greater
  • Beat to Beat Change (max.) 28 bpm
  • Differential Input Impedance > 15MO
  • Electrode Offset Potential Tolerance ± 400 mV
  • Filter Bandwidth 0.8 to 80 Hz
  • Inop Auxiliary Current (Leads Off Detection) < 100 µA
  • Input Signal Range DECG: 20 µVpp to 6 mVpp
  • 20 µVpp to 6 mVpp MECG: 150 µVpp to 6 mVpp
  • Dielectric Strength 1500 Vrms
  • Defibrillator Protection None
  • ESU Protection None

Non-invasive blood pressure

  • Measurement Ranges:
    • Systolic 30 to 270 mmHg (4 to 36 kPa)
    • Diastolic 10 to 245 mmHg (1.5 to 32 kPa)
    • Mean 20 to 255 mmHg (2.5 to 34 kPa)
  • Accuracy:
    • Max. Std. Deviation: 8 mmHg (1.1 kPa)
    • Max. Mean Error: ±5 mmHg (±0.7 kPa)
  • Pulse Rate Range Accuracy:
    • 40 to 300 bpm
    • 40 to 100 bpm: ±5 bpm
    • 101 to 200 bpm: ±5% of reading
    • 201 to 300 bpm: ±10% of reading
  • Measurement Time:
    • Typical at HR > 60bpm
    • Auto/manual: 30 seconds (adult)
    • Maximum time: 180 seconds (adult)
  • Cuff Inflation Time Typical for normal adult cuff: Less than 10 seconds
  • Initial Cuff Inflation Pressure 165 ±15 mmHg
  • Auto Mode Repetition Times 1, 2, 2.5, 3, 5, 10, 15, 20, 30, 45, 60 or 120 minutes


More information about the Philips Avalon FM40/50

If they can monitor triplets, imagine what else the Philips Avalon FM40 and FM50 fetal monitors can do for you. Based on the legendary Philips IntelliVue patient monitoring platform, these monitors are simply smart enough to provide all the information you need to care for your patients. The advanced Avalon FM40 and FM50 offer you a remote touchscreen display option, backup memory, LAN interface, smart transducers, color touchscreen, and other vital bene? ts that caregivers the world over have come to expect from Philips.

The Avalon FM50 fetal monitor provides you with integrated monitoring of maternal blood pressure, SpO2, pulse rate, and ECG, as well as monitoring of multiple fetal heart rates, uterine activity, and fetal movement. The system also provides cross channel verification (CCV) to discriminate between maternal and all fetal heart rates.

Freedom of movement meets peace of mind with the Avalon CTS

The Avalon FM40 and FM50 fetal monitors are compatible with the Avalon Cordless Transducer System (CTS) to provide freedom of movement for the mother during continuous monitoring by the care team. The system also transmits data to the OB TraceVue information system to add to the overall patient record.

Connect to OB Trace Vue for a complete picture from the start

The Avalon FM40 and FM50 fetal monitors connect seamlessly to OB TraceVue, the Philips obstetrical information management system for the continuum of care from the ? first antepartum visit through labor, delivery, postpartum, and newborn nursery care.


The Avalon FM50 lets you monitor and document:

  • Up to three fetal heart rates externally using ultrasound
  • Uterine activity using an external Toco transducer
  • Maternal heart rate via ECG electrodes
  • Maternal blood pressure and pulse oximetry


  • Touchscreen for intuitive, easy operation up to 50% below OEM prices with the same service and warranty as new. The Philips Avalon Fm Fetal Monitor is not only technically refurbished but also cosmetically refurbished to make it work and look like new. When the refurbishing process starts on the Philips Avalon FM Fetal Monitor is carefully inspected and tested by our own in-house biomedical engineers that are highly skilled and certified to work on Philips Avalon FM Fetal Monitor
    . If necessary, parts are replaced to make sure that all aspects of the pump are functioning properly. Once everything is in working order, the unit is calibrated back to the original engineering manufacturer specifications. This ensures that the unit is working the same way that it originally left the manufacturer. After the Philips Avalon FM Fetal Monitor System is working like new it undergoes a special cosmetic restoration process. The Philips Avalon FM Fetal Monitor is cleaned, minor scratches and dents are repaired, it’s painted, and new decals are replaced if necessary. After this strenuous refurbishing process, the Unit functions and looks like new. Soma Technology is ISO 13485 certified and ensures that the best quality is given to all capital medical equipment that they sell. Before the Philips Avalon FM Fetal Monitor is labeled patient-ready and packed up for shipment, it goes through one last quality control test that makes sure all aspects are again working as they should. If you are looking to buy refurbished Philips Avalon FM Fetal Monitor
    contact soma at [email protected] or call us at 1-800-GET-SOMA.Soma Technology, Inc. is also actively looking to purchase a Philips Avalon FM Fetal Monitor System
    If you or your facility is looking to sell your Philips Avalon FM Fetal Monitor , be sure to contact Soma Technology, Inc. Soma has a dedicated and experienced purchasing department that helps you through the entire process. Selling your used or pre-owned Philips Avalon FM 50 Fetal Monitor to Soma Technology takes out the middle man in the equation. This also ensures that your medical facility gets top dollar for your equipment. Soma Technology is 100% HIPPA compliant and makes sure that your equipment gets to our facility in the same condition that it left yours. Soma Technology also gives the option for trade-in credit on your medical equipment. If you or your facility is looking to regain space for new equipment, or if you are looking to upgrade your current equipment, contact Soma Technology’s purchasing department at [email protected] or send us a message on our </a href=”” target=”_blank”>Sell to Soma website.

    Questions about our Fetal Monitors?

    Soma Technology, Inc offers a wide range of Fetal Monitors
    . If you have any questions about any of our Fetal Monitors
    or need a quick quote, call 1-800-GET-SOMA and one of our knowledgeable sales representatives will help you.


Questions about our Fetal Monitors?

Soma Tech Intl offers a wide range of fetal monitors. If you have any questions about any of our fetal monitors or need a quick quote, call us and one of our knowledgeable sales representatives will help you.

Looking to sell your fetal monitors? Soma ensures your facility gets top dollar for your equipment and also gives the option for trade-in credit.

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