MKS 1179B03952CR14V Purity Diaphragm Valve Flow Meter HM20-4VKLC M5 M4 1/4

( Brand: Mks ), ( Manufacturer Part Number: 1179B03952CR14V ), ( Part Type: Valve ), ( Suitable Media: Silane ), ( Valve Operation: Air-operated ), ( Valve Make: Hamlet ), ( Valve Part Number: Hm20-4vklc M5 -m4 )

Review MKS Flow Meter M5 M4 Hi purity Diaphragm Valve 1/4 Inch

The **MKS 1179B03952CR14V Flow Meter (HM20-4VKLC) with M5/M4 Hi-Purity Diaphragm Valve (1/4")** is a precision-engineered, high-performance gas flow measurement and control solution designed for demanding applications in semiconductor manufacturing, research laboratories, and advanced materials processing. This integrated system combines the reliability of MKS Instruments renowned mass flow controllers with the robustness of a high-purity diaphragm valve, ensuring accurate, repeatable, and leak-tight performance in environments where contamination, precision, and durability are critical. The **HM20-4VKLC** flow meter operates on the principle of thermal dispersion, utilizing a heated sensing element to measure the thermal conductivity and mass flow rate of gases with exceptional sensitivity and stability. Its **4-wire design** enhances accuracy by compensating for temperature fluctuations and drift, making it ideal for applications requiring sub-ppm level control, such as plasma etching, chemical vapor deposition (CVD), or thin-film deposition processes. The flow meter s **wide dynamic range** spanning from **0.1 sccm to 1000 sccm** (depending on the gas) allows for versatile use across a variety of gases, including corrosive or reactive species, while its **high-purity construction** ensures minimal outgassing and maximum compatibility with ultra-clean environments.

Complementing the flow meter is the **M5/M4 hi-purity diaphragm valve**, a robust yet precise control mechanism engineered for seamless integration with the flow meter s housing. This **1/4" (6.35 mm) connection** ensures compatibility with standard process lines while maintaining an ultra-low leakage rate critical for maintaining vacuum integrity in sensitive applications. The diaphragm valve is constructed from **high-purity materials**, including **316L stainless steel** and **PTFE or PFA-coated components**, to prevent cross-contamination and ensure resistance to aggressive chemicals, such as hydrogen fluoride (HF), chlorine (Cl ), or ammonia (NH ). Its **fail-safe design** guarantees that the valve remains in a closed position in the event of a power failure or system malfunction, protecting downstream equipment and maintaining process stability. The valve s **low torque actuation** and **smooth, linear motion** minimize wear and extend operational lifespan, while its **quick-connect fittings** facilitate easy installation and maintenance without compromising system integrity.

Together, the **MKS 1179B03952CR14V flow meter and diaphragm valve** represent a seamless fusion of measurement and control, offering users a **single-point solution** for precise gas delivery in high-stakes applications. The system s **digital interface compatibility** allows for easy integration with PLCs, DCS, or lab automation software, enabling real-time monitoring, logging, and remote control via protocols such as **RS-232, USB, or Ethernet**. Additionally, the **modular design** of the HM20-4VKLC flow meter allows for easy calibration and replacement of sensors, reducing downtime and ensuring long-term reliability. Whether deployed in **semiconductor wafer fabrication, materials research, or specialized chemical synthesis**, this flow meter and valve combination delivers the **precision, purity, and durability** required to maintain process consistency and achieve superior results in even the most exacting environments.

### **Pros and Cons of buying a MKS 1179B03952CR14V Flow Meter with HM20-4VKLC and M5/M4 Hi-Purity Diaphragm Valve (1/4")**

#### **Pros**

1. **High Precision and Reliability** The MKS 1179B series is known for its accuracy in mass flow measurement, particularly in high-purity applications such as semiconductor manufacturing, vacuum systems, and gas delivery. The thermal conductivity-based design ensures consistent readings even with varying gas compositions.

2. **Compatibility with High-Purity Gases** The **HM20-4VKLC** controller and **M5/M4 hi-purity diaphragm valves** are designed for ultra-clean environments, reducing contamination risks in sensitive processes. The materials used (likely stainless steel, PTFE, or other corrosion-resistant alloys) minimize cross-contamination.

3. **Modular and Flexible Design** The system integrates seamlessly with MKS s broader product line, allowing for easy expansion or integration with other flow controllers, pressure gauges, or vacuum systems. The **1/4" NPT or CF connections** provide versatility for different setups.

4. **Digital Control and Communication** The **HM20-4VKLC** controller supports **RS-232, USB, or Ethernet (depending on model)** for remote monitoring and automation, making it suitable for industrial or lab automation. This reduces manual intervention and improves process control.

- **Semiconductor & Microelectronics** (etching, deposition, cleaning)

- **Vacuum Systems** (leak detection, gas dosing)

- **Research Labs** (gas mixing, flow calibration)

- **Medical & Pharmaceutical** (sterile gas delivery)

6. **Durability and Low Maintenance** MKS instruments are built for long-term use in demanding environments. The diaphragm valve s design minimizes wear, and the flow meter s robust construction reduces the need for frequent recalibration.

7. **Calibration and Traceability** MKS provides certified calibration services, ensuring compliance with industry standards (e.g., ISO, ASTM) for critical applications.

---

#### **Cons**

1. **High Initial Cost** MKS equipment is premium-priced, which may be a barrier for small labs, startups, or budget-conscious buyers. The **1179B flow meter alone** can cost several thousand dollars, and adding the **HM20 controller and valves** increases the total expenditure significantly.

2. **Complex Setup and Training** The system requires proper installation, calibration, and operator training to avoid errors. Misconfiguration could lead to inaccurate readings or equipment damage. Some users may need technical support from MKS or a certified integrator.

3. **Limited DIY Repairs** Unlike consumer-grade devices, MKS instruments are not designed for easy DIY maintenance. Repairing or replacing internal components (e.g., sensors, valves) typically requires specialized tools and expertise, increasing long-term costs.

4. **Power and Connectivity Requirements** The **HM20 controller** may require a stable power supply and proper cabling for communication (e.g., Ethernet or USB). Poor connectivity can disrupt automation workflows.

5. **Gas-Specific Limitations** While versatile, the flow meter s accuracy can degrade with **highly corrosive or reactive gases** (e.g., fluorine, chlorine) unless the correct materials (e.g., Hastelloy, quartz) are specified. Always verify compatibility with your gas mixture.

6. **Potential for Signal Noise in High-Vibration Environments** In industrial settings with significant mechanical noise, the flow meter s readings may require filtering or additional shielding to maintain precision.

7. **Depreciation Over Time** High-end lab equipment loses value quickly. If the system is not used intensively, the investment may not be fully justified for long-term cost savings.

---

### **Conclusion**

The **MKS 1179B03952CR14V flow meter with HM20-4VKLC controller and hi-purity diaphragm valves** is a **superior choice for high-precision gas flow control in demanding applications**, particularly in **semiconductor manufacturing, vacuum systems, or research labs**. Its **accuracy, reliability, and compatibility with high-purity environments** make it indispensable for critical processes where contamination or measurement errors are unacceptable.

However, the **high upfront cost, complexity of use, and maintenance requirements** may not justify the purchase for **small-scale or non-critical applications**. If budget is a constraint, alternatives like **Brooks or MKS s lower-tier models (e.g., 1179A series)** or **mass flow controllers from other brands (e.g., Sierra, Aera) with similar specifications** could be considered.

### **Recommendation**

- You require **ultra-high precision** in gas flow measurement (e.g., semiconductor fab, vacuum systems).

- Your application demands **high-purity gas handling** (e.g., medical, aerospace, research).

- You can **integrate it into an automated system** (e.g., via RS-232/Ethernet).

- Budget is not a limiting factor, and long-term reliability is prioritized.

- You need a **budget-friendly solution** for non-critical applications (e.g., basic lab gas mixing).

- Your team lacks **technical expertise** to install, calibrate, and maintain the system.

- The environment has **extreme vibrations or corrosive gases** that may affect performance without proper modifications.

- You anticipate **low usage** where depreciation would outweigh benefits.

**Final Suggestion:** If possible, **rent or lease** the equipment for a trial period before committing to purchase, or consult with an **MKS distributor** to explore financing options. Additionally, check for **used/refurbished units** (from reputable sources) to reduce costs while maintaining reliability.

Details:

Specs are listed above. Hamlet 1179B03952CR14V All Photos 7 images thumbnail to view Here is an MKS Mass Flo Meter with a HM20-4VKLC M5 M4 High Purity Diaphragm Valve 1/4. Technical Specifications, make hamlet, valve part 20-4 vklc m5 -m4, flow meter make Mks, number1179b03952cr14v, ports 2 port valve, material316 stainless steel, size 1/4, , control pneumatic pilot diaphragm. These are ultra-high purity valves.

These were previously used with process gases on semiconductor equipment. LOCATION: B0305. Item condition: Used Shipping Primary Shipping:Free USPS Ground Advantage.

part #: 1179b03952cr14v prices

• $146.42-$799.00

specifications valvesplumbing:

• brand: Mks
• mpn: 1179b03952cr14v
• part type: Valve
• suitable media: Silane
• valve operation: Air-operated
• valve make: Hamlet
• valve part number: Hm20-4vklc M5 -m4

shipping valvesplumbing:

• type: Calculated
• cost: $0.00
• carrier: USPS, UPS
• service: USPS Ground Advantage, UPS Ground, UPS Next Day Air
• class: Standard, One-day
• transit: 4-9 Days

payments valvesplumbing:

• credit card: Visa
• wallet: Apple-pay
• other

returns valvesplumbing:

• policy: Returns Accepted
• method: Money back
• time: 30 Days
• paid by: Buyer

offer valvesplumbing:

• sold: 0
• best offers: True
• availability: In Stock
• options: Ship-to-home
• started: May 14, 2026
• quantity: 10

general valvesplumbing:

• condition: Used
• Hydraulics, Pneumatics, Pumps Plumbing > Valves Manifolds > Other Valves Manifolds

seller valvesplumbing:

• rating: 100.0%
• city: Laporte, Colorado
• # reviews: 21620

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