Spectra S1 Vs S2 Comparison: What Is The Difference

Are you planning to only breastfeed your newborn? If yes, then you will need to buy a good and effective breast pump. Whether you are a stay at home mom or a working mom, a good breast pump is a must-have gadget. A lot of moms are usually torn between the Spectra s1 vs s2.

See, I, too, was confused. These two products look like the same thing if their appearance is anything to go by. The spectra brand is relatively new in the US, but it is getting quite popular among moms. It offers Spectra S1 and Spectra S2 breast pumps.

If you are undecided about whether to buy the spectra s1 or spectra s2, we got you. Let’s look at the differences between the spectra s1 and s2.

Similar Features In Spectra S1 And S2 Breast Pumps

These are double electric breast pumps. What this means is that you can pump the breast simultaneously. When power pumping, the s1 and s2 come in handy.

Here are features you will find in both models.

  • Nightlight
  • Easy to adjust suction control
  • An automatic timer
  • LED digital display
  • Closed system
  • Lightweight
  • 2-year warranty

What is the difference between spectra breast pump s1 vs. s2?

As earlier mentioned, these two breast pumps are almost similar. However, there are a few things that could make all the difference for a pumping mommy.

  • Whereas spectra S1 comes with a battery that is built-in, the S2 doesn’t. Rather, the Spectra S2 has an AC-Adapter as a power option.
  • The S1 is slightly more expensive than the Spectra S2
  • The Spectra breast pump S1 is available in white and blue, whereas the Spectra S2 is white and pink.
  • In terms of size, the S2 is a little bit smaller than the Spectra S1.
  • While the S1 was introduced into the market in 2013, the S2 was introduced into the market in 2015

As you can see, there isn’t much difference between the two breast pumps. However, the few differences we have mentioned could mean a lot to an individual.

Which breast pump should I buy between Spectra S2 and Spectra S1?

This all comes down to your personal preferences and how you intend to use your spectra breast bump.

Who is the Spectra S1 best for?

  • Moms who would like to express milk while on the move. For example, while at work or traveling.
  • It is ideal if you are an exclusive pumper because you can pump from just anywhere.
  • It is perfect for moms who sometimes want to pump without having to look for a power port to plug in a breast pump even while at home.
  • Moms who are okay with the extra 200grams of weight

Who is the Spectra S2 best for?

  • Moms on a tight budget
  • Moms who don’t mind having to plug in the breast pump at a power-point anytime they want to pump.
  • Stay at home moms or someone who only pumps at work

What Are The Advantages Of Spectra Breast Pumps?

I’ve seen women in Facebook groups and on Reddit rave about the spectra breast pumps. I have used a Spectra S2 and loved it. Here are some key features that make them a must-have for every nursing mom.


Breast pumps that are used in hospitals work better when compared to the usual breast pump you will buy anywhere.

Although the term hospital grade is unregulated and any breast pump manufacturer can use it for marketing their pump, saying a pump is hospital-grade means that the suction strength of such a pump is strong.

Since hospital-grade breast pumps typically have a more robust pump suction, the spectra breast pumps are great for moms who need help in establishing or increasing their milk supply.

Discreet/ Quiet

Whether you are expressing when your little one is asleep or while on a conference call, the spectra breast pumps are extremely quiet. You don’t have to worry about waking your baby with the sound of the breast pump.

For the nursing mom pumping at work, you should be able to pump privately without anyone hearing the sound of a breast pump.

According to their website, their pumps are about 45 decibels- this is similar to your computer’s noise level.

BPA free

When it comes to plastic, there are so many health concerns.

Therefore, knowing that Spectra breast pumps are made of safe plastic is quite reassuring.

Closed pump system

The S1 and S2 breast pumps are closed systems. What this means is that milk doesn’t reverse back while you are pumping and get into the pump itself. If milk gets into the system, it could possibly cause the motor to malfunction.

Another great thing about the closed system is that it makes these pumps extremely hygienic. Furthermore, you will not have to keep cleaning the tubes in the pump.

Massage and expression mode

This was one of the features of spectra pumps that I absolutely loved.  It makes pumping sessions super comfortable.

Once you start using the pump, it will start in massage mode. These are short and slow movements that are designed to stimulate breast milk letdown, which are similar to how you’d expect a baby to suck at the breast once they start nursing.

The expression mode, on the other hand, offers a much deeper but slow suction similar to what you would expect from a baby once the milk starts flowing.

The best thing is that one can adjust these settings, which is great when trying to establish a letdown when pumping.

Single and double

Both the S1 and S2 can be used as either a single breast pump or a double breast pump. If you want to express milk from a single breast at a time, you can set your spectra breast pump to do exactly that.

Still, if you would like to pump both breasts at the same time, you can do that. Whatever your preferences, this breast pump got you.

What Are The Disadvantages Of Spectra Breast Pumps?

Replacement parts

One drawback of spectra breast pumps is that it can be quite hard to find replacement parts in your nearby store. Unlike other breast pumps where you will find spare parts in your nearest Target store, spectra spare parts aren’t everywhere.

To avoid this, I recommend buying extra sets as you purchase your breast pump. Although you may never need them, it doesn’t hurt to have some extra’s in there.


Both of the spectra brands come with two flanges. However, women have different breast sizes and shapes. Therefore, the flanges that are provided may not be perfect for your breast size and shape.

Some moms have to go through different spectra units before they can finally find the right flanges. This can be inconveniencing for a new mom who just wants to begin pumping as soon as possible.

Furthermore, some women reported that the flanges available seemed rough.

Quick tips for finding the right flange size

You will need a measuring tape or a ruler. The measurements must be in mm. 1 cm=10mm.

Start by measuring the diameter of your nipple at the bottom, excluding the areola. Record your measurements. Then use these estimated diameter sizes to select the right flange.

  • Diameter of up to 16mm use 20mm flange
  • Diameter of up to 20mm use 24mm flange
  • Diameter of up to 24mm use 28mm flange
  • Diameter of 28mm use 32mm flange


Both the S1 and S2 are worth their price. However, they may still be expensive for some moms. If you are on a limited budget, there are other cheaper options of good quality breast pumps on the market.

You may also want to talk to your insurance company to see if they offer free breast pumps. Most insurance policies will cover the cost of your Spectra breast pump.


Can I plug the S2 in the car?

The spectra S2 breast pump can be plugged in the car with a car adaptor. However, you may notice the pump doesn’t perform so well, but it still works.

Which is better spectra S1 or S2?

This all depends on your needs. If you are returning to work, the S1 will suit you. It has a built-in rechargeable battery. On the other hand, if you often pump at the same spot, an S2 would be ideal. You need a power outlet each time you are using it.

How long does it take to charge the spectra S1?

To fully charge the S1, it will take 4 hours

How do I sterilize spectra breast bumps?

All the parts should be washed in warm soapy water and thoroughly rinsed. The tubing should never come into contact with any milk or water because the spectra pumps have a closed system. Avoid inserting anything into the duckbill valves during cleaning. Never boil your pump accessories for over 5 minutes. Too much exposure to heat will likely spoil your accessories.

Which bottles are compatible with spectra S1 and S2?

Since spectra breast shields have a wide neck, any bottles that come with such a wide neck is compatible. Some brands that work well with these pumps include;

  • Pumpables
  • Avent both natural and classic
  • Difrax-S
  • Minbie glass and plastic
  • Happy Baby bottles
  • Mam
  • Brown’s wide neck

Does a higher suction mean you will produce more milk?

Some moms think that when using a breast pump, you need to turn it to the highest suction settings to increase your milk supply. However, that is not true. Too much vacuum may damage your nipples and breasts. Use a vacuum level that is comfortable for you.

Finally, Spectra S1 Vs S2. Which one is better?

Since we have reviewed the S1 and S2, you alone will know which one suits your needs. I would go for Spectra S1 because it is portable and I can use it anywhere as long as the built-in battery is recharged.

However, if you do not mind having to plug in your breast pump each time you want to pump, then Spectra S2 is idea.


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