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Deciding between the Momcozy S9 Pro vs S12 Pro can be daunting on top of navigating new motherhood. Both models belong to Momcozy's S series and share similar appearances, but they serve different needs and budgets. The S12 Pro is the deluxe version with more powerful suction and extra pumping modes, whereas the S9 Pro provides reliable performance at a lower price. Knowing the main differences between these wearable breast pumps will allow you to make a knowledgeable choice that suits your pumping objectives and lifestyle.
What Are the Key Design Differences Between the Momcozy S9 Pro and S12 Pro?
The philosophy of design for every pump demonstrates a significant understanding of the intended functionality and user experience.
Overall Design
- 6-piece design: flange, milk collector, valve, silicon diaphragm, linker, and motor unit
- Accessories: USB Type-C cable and flange cover
- Available in two sophisticated color options
- Compact dimensions: 133mm × 105.5mm × 73.5mm for enhanced portability
- 6-component system with the same components as the S12 Pro
- Available in three color variants for mothers who want more aesthetic choices
- Slightly larger dimensions: 137.5mm × 105.5mm × 73.5mm (adding only 4.5mm in length)
- Maintains excellent portability despite the size difference
Shared Design Features:
- Both pumps feature wearable, closed-system design
- Motors positioned on top of the collection cups
- No tubing or wires required
- Motor-on-top design makes both pumps slightly less discreet than all-in-one models
- Highly convenient for busy mothers seeking hands-free pumping solutions
Flange Design
Shared Features: • Both models feature 105° flanges for optimal pumping angles • Both support multiple flange sizes for customized fit
S9 Pro Flange Setup:
- Comes with 24mm flange by default
- Includes three flange inserts (17mm/19mm/21mm) at no extra cost
- 27mm flange sold separately
- Utilizes standard flange design without additional cushioning
- Maintains a more traditional approach to breast pumping functionality
S12 Pro Flange Setup:
- Provides 24mm flange by default only
- Flange inserts (17mm/19mm/21mm) available as separate purchases
- 27mm flange available as separate purchase
- Features Momcozy's innovative DoubleFit Flange technology
- Acts as a breast cushion providing snug and comfortable hug around the breast
Key Design Differentiator: • S12 Pro's DoubleFit Flange offers two main benefits:
- Enhanced comfort during pumping
- Leak prevention for greater confidence
- S9 Pro maintains traditional flange functionality without cushioning features
Milk Collection Capacity
The 210ml milk collector on the S12 Pro has a 30ml edge over the 180ml of the S9 Pro. The difference is notable for longer pumping sessions or for those mothers with greater milk production, as it means less frequent emptying and less risk of milk loss.
The S12 Pro's larger capacity makes it ideal for mothers who pump 4-6 ounces per session or engage in extended pumping routines, reducing interruptions and workflow disruption. Its wider design provides more stable milk storage during movement.
Conversely, the S9 Pro's 180ml collector offers a more compact profile that some mothers find easier to manage and conceal under clothing, making it suitable for discrete workplace pumping or mothers with moderate milk output who prefer lighter, less bulky equipment during daily activities.
LED Screen and Button
The S12 Pro has a much better LED screen compared to the S9 Pro's basic screen. And its larger and clearer screen has an inbuilt timer, so you can easily monitor your pumping sessions and battery life—really convenient for busy mothers who may not remember to do that manually.
Conversely, the S9 Pro has a basic LED display that's user-friendly with single-touch button control but doesn't have automatic tracking features. Individuals need to keep an eye on pumping time and battery level manually, demanding greater attention while in use.
How Do Momcozy S12 vs S9 Compare in Pumping Performance?
These models' differences in performance are seen upon checking their suction power and the modes they offer.
Pumping Power, Modes, Patterns and Performance Comparison:
| Feature | S12 Pro | S9 Pro | Difference Notes |
| Motor Technology | 1st Generation Motor | 1st Generation Motor | Same platform |
| Available Modes | 3 modes | 2 modes | S12 Pro has 1 additional Mixed mode |
| Stimulation Mode | ✓ Fast, short rhythm to trigger let-down reflex | ✓ Fast, short rhythm to trigger let-down | Same functionality |
| Expression Mode | ✓ Slow, deep rhythm for effective milk expression | ✓ Slow, deep rhythm to promote milk flow | Same functionality |
| Mixed Mode | ✓ Fast-short then slow-long, combines stimulation and expression rhythms | ✗ Not supported | S12 Pro exclusive |
| Suction Levels | 9-level adjustment | 9-level adjustment | Same |
| Overall Performance Focus | Stronger maximum suction, more customizable, helps faster milk expression | Efficient suction but slightly lower peak than S12 Pro, still provides fast and efficient pumping | S12 Pro offers superior performance |
Detailed Technical Specifications Comparison:
| Mode/Parameter | S12 Pro Specifications | S9 Pro Specifications | Notes |
| Stimulation Mode Vacuum Range | -65 ~ -132 mmHg (±5) | -85 ~ -145 mmHg | S9 Pro has wider range |
| Expression Mode Vacuum Range | -165 ~ -285 mmHg (±5) | -125 ~ -285 mmHg | S12 Pro has stronger minimum suction |
| Mixed Mode Vacuum Range | -65 ~ -285 mmHg (±5) | Not applicable | S12 Pro exclusive feature |
| Stimulation Mode Cycle Speed | 73–127 cycle/min (±2) | 73–127 cycle/min (±2) | Identical |
| Expression Mode Cycle Speed | 18–45 cycle/min (±2) | 18–56 cycle/min (±2) | S9 Pro has higher upper limit |
| Mixed Mode Cycle Speed | 8–17 cycle/min (±2) | Not applicable | S12 Pro ultra-gentle rhythm |
| Maximum Suction Difference | -290 mmHg | -285 mmHg | S12 Pro 5 mmHg higher |
Summary: Both models share the same motor platform, but the S12 Pro offers an exclusive Mixed mode with automatic rhythm transitions and slightly stronger suction power. While both provide reliable 9-level adjustment, the S12 Pro is ideal for mothers prioritizing efficiency and advanced features.
This video uses the S9 Pro as an example to show you how to adjust and set your breast pump's modes.
Which Momcozy Breast Pump Has a Longer Battery Life: S9 or S12?
Battery life significantly impacts the usability of wearable breast pumps, particularly for working mothers.
Charging Time and Use Time
The S9 Pro takes the lead in overall usage time, offering 8-9 pumping sessions (around 270 minutes) from a full charge. It is assumed for each session that there is 30 minutes of active pumping, which is in line with standard exclusive pumping routines. The compromise is in the charging time, taking around 150 minutes to fully charge.
The S12 Pro provides 7-8 sessions (approximately 240 minutes) per charge, but makes up for it with quicker charging at about 130 minutes. This 20-minute charging difference can make a significant difference for mothers with irregular schedules who require quick top-ups in between uses.
Power Efficiency and Management
Both pumps also have the same power management systems with USB Type-C charging for universal compatibility. The marginal difference in battery life probably accounts for the S12 Pro's more powerful suction and extra mode needing greater energy consumption.
How Do Momcozy S12 Pro vs S9 Pro Compare for Portability?
Portability considerations encompass weight, size, noise levels, and ergonomic design factors that affect real-world usage.
Weight and Size Factors
The S12 Pro holds a minor advantage at 240g (including all accessories) compared to the S9 Pro's 250g (including all accessories), although the 10g difference is hardly noticeable in practical use. Additionally, the S12 Pro offers slightly shorter charging time compared to the S9 Pro, enhancing convenience for busy mothers.
The compact dimensions of both devices make them suitable for discreet use in various settings, including offices and public spaces where privacy is essential.
Noise Performance and Discretion
Both the S12 Pro and S9 Pro operate at ≤50dB, equivalent to a quiet library environment. This low noise level enables inconspicuous pumping in professional settings without drawing unwanted attention. The identical noise profiles mean discretion is not a differentiating factor between these models.
Ergonomic Design Factors
The S12 Pro features ergonomic design that promotes comfortable extended wear, though compared to the M5 model, its overall size may be slightly larger, potentially having minor impact on ultimate portability. The S9 Pro similarly prioritizes usability and comfort; while it may be less compact than the S12 Pro, it remains lightweight and comfortable for daily use.
What's the Price Difference Between Momcozy S9 Pro vs S12?
Value evaluation needs consideration of both immediate costs and also possible extra costs.
Initial Investment Comparison
The S12 Pro is priced at $139.99, a $20 premium compared to the $119.99 price tag of the S9 Pro. The 17% difference in price accounts for the upgraded features, extra pumping mode, and better milk collector capacity.
Long-term Value Considerations
The S9 Pro's provision of several flange inserts is the instant value for mothers who are unsure of their ideal flange size. The complete kit would amount to $30-50 in savings in add-on purchases over the S12 Pro's standard configuration.
That said, the S12 Pro's better performance and extra features can make it worth the extra price for pumping mothers who pump a lot or need ultimate efficiency.
Are Momcozy S9 vs S12 Pro Easy to Clean and Maintain?
Maintenance needs definitely influence the long-term user experience with any breast pump.
Component Cleaning Process
Step 1: Disassemble Components
Begin by carefully disassembling all removable parts from the pump unit after each use. Start by turning off the pump and ensuring it's completely stopped before handling. Handle each component with clean hands and place them on a clean surface to prepare for washing. Take care not to force any connections apart, as gentle pressure should be sufficient to detach properly fitted parts.
Step 2: Clean with Warm Soapy Water
Wash all disassembled parts using warm soapy water at 40-60°C for 3-5 minutes. The cleaning ways remains identical between the S9 Pro and S12 Pro models, following standard breast pump hygiene protocols.
Step 3: Sterilize Regularly
Perform periodic sterilization by boiling all cleanable parts for 5-10 minutes. This ensures optimal hygiene and maintains the pump's performance for both models.
Critical safety measures include thorough 20-second hand washing before handling components and visual inspection for cracks or deterioration before each use. After sterilization, allow parts to cool completely to prevent burns. The S12 Pro's streamlined 5-part design versus the S9 Pro's 6-part system means one fewer component to clean and fewer connection points where milk residue can accumulate, potentially reducing cleaning time.
Assembly and Disassembly
This video uses the S12 breast pump as an example to show you how to install it.
Step 1: Prepare and Inspect
Wash your hands thoroughly before starting. Check all parts for cracks or damage - don't use damaged pieces. Both pumps are easy to put together once you get the hang of it.
Step 2: Build the Main Unit
For the S9 Pro, you'll connect 6 parts including a linker piece. Press the silicone diaphragm into the linker, attach the valve firmly, then connect the flange to the milk collector with gentle thumb pressure. The S12 Pro is simpler with just 5 parts - no separate linker needed, so assembly goes faster.
Step 3: Attach to Motor
Push the cylindrical part into the motor unit. Make sure the grooves and notches line up properly - you'll feel it click into place. This creates the right suction and keeps everything clean. To take apart, just reverse these steps for both models.
When to Choose Each Model?
The Momcozy S12 Pro is perfect for mothers seeking higher performance and advanced features. With faster milk expression capabilities and customizable settings, it's ideal for professional use or frequent pumping sessions where efficiency matters most.
The Momcozy S9 Pro offers a balanced solution for those wanting mid-range performance without premium pricing. It delivers reliable functionality at a more competitive price compared to the S12 Pro, making it suitable for regular use while maintaining quality standards.
Both models belong to Momcozy's S Series breast pumps, representing our most cost-effective wearable pump options. These pumps are particularly well-suited for mothers new to wearable pumping technology or those seeking budget-friendly solutions for occasional on-the-go use. The S Series provides an excellent entry point into hands-free pumping without compromising essential features.
For mothers with different pumping needs, Momcozy also offers M Series and V Series breast pumps. These additional product lines are designed to satisfy various requirements, whether you need specialized features, different performance levels, or specific design preferences. This comprehensive range ensures that every mother can find the perfect pumping solution that matches her lifestyle, budget, and performance expectations.
Choose the S12 Pro for maximum efficiency, the S9 Pro for balanced performance and value, or explore our M and V Series for alternative solutions tailored to your unique needs.
Frequently Asked Questions
Q1. Which Is the Better Pump for Exclusive Pumping - Momcozy S9 Pro or S12 Pro?
For exclusively pumping mothers, the S12 Pro is beneficial with its mixed mode and bigger milk collector size. Automatic switching between stimulation and expression modes can enhance efficiency for those who pump frequently, while the 210ml collector minimizes interruptions for those with longer sessions. The S9 Pro's longer battery life, though, might be more desirable for those pumping all day who prefer fewer charges.
Q2. Are Different Flange Sizes Available for Use With Both the S9 Pro and S12 Pro?
Yes, both pumps accommodate various flange sizes, but the S9 Pro includes more options initially. The S9 Pro comes with 17mm, 19mm, and 21mm inserts plus the standard 24mm flange, while the S12 Pro includes only the 24mm flange by default. The S12 Pro also offers the same inserts (17mm, 19mm, and 21mm), but they must be purchased separately. Both models support the separately-sold 27mm flange for mothers requiring larger sizes. Proper flange sizing is crucial for comfort and milk output efficiency.
Q4. Which Pump Is More Economical Based on All Costs?
The total cost depends on your flange size needs. The S9 Pro offers better immediate value with included flange inserts, potentially saving $30-50 in additional purchases. However, if you only need the standard 24mm flange, the S12 Pro's enhanced features may justify its $20 premium. Consider your pumping frequency and feature requirements when calculating long-term value.
Q5. Are Replacement Parts Readily Available for Both Models?
The S9 Pro and S12 Pro have similar spare parts including flanges, valves, and diaphragms, but parts are not interchangeable between the two models. Each pump requires its specific components to ensure proper fit and function. Momcozy maintains good inventory for both pumps' dedicated parts, although because the S12 Pro is newer, those parts may have longer availability. It's crucial to use only the correct model-specific parts when replacing worn components to maintain both pumps' smooth and sanitary operation while ensuring optimal performance and safety.
Discover the Ideal Momcozy Breast Pump
The choice of Momcozy S9 Pro vs S12 Pro really comes down to your individual pumping needs, budget, and which features are most important to you. The S12 Pro warrants the higher price through its increased suction power, useful mixed mode, and greater milk collector capacity, making it perfect for mothers who pump a lot or require ultimate efficiency. The S9 Pro provides good performance with better initial value through the inclusion of flange inserts and longer battery life, ideal for mothers who want solid performance at a more affordable cost.
Both pumps embody Momcozy's dedication to aiding breastfeeding mothers through innovative, wearable technology. You may also want to look into Momcozy's M Series and V Series breast pumps, which provide more choices to meet various needs and preferences. Regardless of whether you go with the feature-packed S12 Pro or the budget-friendly S9 Pro, you're investing in a tool that will help make your breastfeeding experience more convenient and successful.
