Sonoline B Fetal Doppler Reviews: Handheld Heart Rate Monitoring


The Sonoline B handheld pocket fetal Doppler allows mothers to experience the joy of hearing her child’s heartbeat. This is a magical moment during pregnancy, and it also offers the opportunity of monitoring a baby’s heartbeat for medical reasons.

[Read more about Pregnancy]

The Sonoline B is one of the best units on the market today. We’ve had the pleasure of trying this model ourselves, and we’re going to give you one of the most in depth, concise Sonoline B fetal doppler reviews available today. Let’s first take a look at this unit’s spectacular features, and then we’ll go into our own review of how this product works.

Features and Specifications

  • Built-in speaker with volume control
  • 2MHz – 3MHz probe
  • 60g ultrasound gel
  • Requires 2 AA batteries
  • Earphone socket
  • FHR detection
  • 8 hours per 2 AA battery life span
  • Automatic power off feature

Usage and Setup

Simple and easy to use, you can set up this unit quickly and easily. First and foremost, the LCD display is backlit, so you can see the display even in low light settings. The display will tell you your baby’s current fetal heart rate (FHR).

Clear and easy to read, you’ll also have a few buttons to control this unit:

  • Mode Control: The mode control allows you to switch through several different modes:
    • Real-time heart rate
    • Average heart rate
    • Heart rate for a specific duration
  • Power Button: A simple on-off button.
  • Backlit Button: Illuminates the LCD display.

The mode control is very important. When you have the unit on the real-time heart rate setting, you’ll notice that this is not the most accurate reading because your baby’s heart rate will fluctuate. Many people recommend using the average heart rate as a better indicator of your baby’s heart rate over a period of time. The manual mode also allows you to check your baby’s heart rate for irregularities during a specific time frame.

Once you’re accustomed to the controls, it’s very simple to get started and hear your baby’s heartbeat for the very first time. You’ll want to follow these steps:

  • Apply the gel to your stomach. Many people recommend aloe vera gel, but this is up to you. The 60g gel included is good for 60+ tests.
  • Lay flat on your back; preferably on the bed. You can apply the gel before or after laying down.
  • Turn on the unit by hitting the middle button.
  • Choose your desired mode.
  • Use the probe to try and locate your baby. You’re looking for a “galloping” sound.
Sonoline B Fetal Doppler headphone on white background.

You’ll also be able to plug headphones into the top of the unit and control the volume. There’s an external speaker on the front of the unit if you don’t want to plug in headphones, and you can even plug this unit into a computer to export the sound and make it digital. This is the optimal solution for the mother who wants to cherish this moment forever.

It’s important to know that there are two probes: 2 MHz and 3 MHz. You’ll want to adjust the settings depending on your own level of body fat. If you have difficulty hearing your baby’s heartbeat, try adjusting the megahertz of the probe to detect the heartbeat.

We were able to use this unit for eight hours on just two batteries, and it will shut off automatically if you happen to fall sleep. The manufacturer does state that the probes are waterproof, but we did not test this out ourselves just in case.

And if something is wrong during shipping or during the manufacturing process, there is a one-year mail-in warrantee that will have the unit serviced in the United States.

The Sonoline B Fetal doppler is the perfect doppler for any mother to be a wants to be able to monitor her baby’s FHR quickly and easily.

Click here to start listening to your baby’s fetal heart rate today.


Please enter your comment!
Please enter your name here