MILLIPORE 01-0138-C Vac Water Pressure Gauge 30PSI

( Brand: Millipore ), ( Manufacturer Part Number: 01-0138-C ), ( Part Type: Pressure Gauge ), ( Connection Diameter: 1/4 In ), ( Mounting Position: Side/bottom Mount ), ( Unit Quantity: 1 Lot Of 2 ), ( Maximum Pressure: 30 Psi ), ( Country Of Origin: United States )

Review MILLIPORE Span Pressure Gauge 30 Inch Vac 30psi

The **Millipore 01-0138-C Span Pressure Gauge (30 VAC / 30 PSI)** is a precision-engineered, dual-range vacuum and pressure gauge designed for reliable monitoring and calibration in laboratory, industrial, and research applications. This compact yet robust instrument features a durable, hermetically sealed bourdon tube mechanism, ensuring long-term accuracy and resistance to environmental contaminants such as moisture, dust, and corrosive gases. The gauge s dual-scale design allows for seamless transition between vacuum measurements (up to 30 inches of mercury or 30 VAC) and pressure readings (up to 30 pounds per square inch or 30 PSI), making it ideal for systems requiring versatile monitoring of both negative and positive pressure differentials. Constructed from high-quality materials, including a corrosion-resistant housing and a clear, impact-resistant glass window, the gauge provides unobstructed visibility of the needle s position while maintaining structural integrity under fluctuating conditions. Its precise calibration and repeatable performance are further enhanced by the inclusion of a built-in span adjustment feature, enabling users to fine-tune readings for optimal accuracy without the need for external tools. The gauge s compact size and versatile mounting options including threaded or flange connections make it easily integrable into existing vacuum or pressure systems, whether in laboratory setups, semiconductor manufacturing, or HVAC applications. With its combination of durability, precision, and adaptability, the Millipore 01-0138-C serves as an indispensable tool for professionals who demand reliable, real-time monitoring of critical pressure and vacuum parameters.

The Millipore 01-0138-C is a span pressure gauge designed to measure vacuum (30 VAC) and pressure (30 PSI). Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Dual Range Measurement**

The gauge measures both vacuum (up to 30 inches of mercury, or 10.2 kPa) and pressure (up to 30 PSI, or 207 kPa). This versatility makes it useful in applications where both vacuum and positive pressure need to be monitored, such as in filtration systems, laboratory equipment, or HVAC setups.

2. **Compatibility with Millipore Systems**

As a Millipore product, it is designed to integrate seamlessly with Millipore s filtration and water purification systems. This ensures compatibility with other components in their product lines, reducing the risk of cross-contamination or operational issues.

3. **Durability and Reliability**

Millipore products are generally built to withstand frequent use in laboratory and industrial environments. The gauge is likely constructed with materials that resist corrosion and wear, which is important for applications involving water, chemicals, or repeated cycling between vacuum and pressure.

4. **Easy Installation and Calibration**

The gauge appears to be a standard analog dial gauge, which is straightforward to install and read. Many Millipore gauges are pre-calibrated, reducing the need for user calibration. The span feature (adjustable range) allows for fine-tuning to specific application requirements.

5. **Cost-Effective for Specific Applications**

For users already invested in Millipore s ecosystem, purchasing this gauge may be more cost-effective than sourcing a third-party alternative. It avoids the need for additional adapters or compatibility testing.

6. **Visual Readout**

Analog gauges provide a clear, immediate visual indication of pressure or vacuum levels, which can be advantageous in real-time monitoring scenarios where quick adjustments are necessary.

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### **Cons**

1. **Limited Range**

The gauge s range is relatively narrow (30 VAC and 30 PSI). For applications requiring higher vacuum (e.g., deep vacuum systems) or pressure (e.g., industrial compressors), this gauge may not be sufficient. Users with broader requirements may need to pair it with additional gauges or sensors.

2. **Analog Design Limitations**

Analog gauges lack digital precision and data logging capabilities. If precise measurements, historical data, or integration with digital systems (e.g., SCADA or IoT platforms) are required, a digital pressure/vacuum sensor would be more appropriate. This gauge does not provide outputs for automation or remote monitoring.

3. **Potential for User Error**

Analog gauges rely on human interpretation of the dial. Misreading the gauge or failing to account for environmental factors (e.g., temperature fluctuations affecting accuracy) could lead to operational errors. Digital gauges or sensors mitigate this risk.

4. **Maintenance Requirements**

Analog gauges may require periodic recalibration or replacement of internal components (e.g., the bourdon tube or dial mechanism) over time. This adds to long-term maintenance costs and downtime if the gauge fails unexpectedly.

5. **Limited Connectivity**

The gauge lacks ports for signal outputs (e.g., 4-20 mA, RS-485, or digital interfaces). Users needing to interface with control systems or data acquisition tools will require additional hardware (e.g., a transmitter or converter).

6. **Replacement Parts Availability**

While Millipore is a reputable brand, replacement parts for older or discontinued models may become difficult to source over time. This could lead to extended downtime if the gauge fails and spare parts are unavailable.

7. **Potential for Condensation or Corrosion**

If used in environments with high humidity or exposure to corrosive substances (e.g., water, chemicals), the gauge s internal mechanisms or dial face may degrade faster. Millipore gauges are typically rated for laboratory use, which may not cover all industrial environments.

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### **Conclusion**

The Millipore 01-0138-C span pressure gauge is a practical choice for users who require a simple, dual-range (vacuum/pressure) analog gauge within a specific operating range (30 VAC/30 PSI). It excels in applications where integration with Millipore systems is critical, and where a visual, analog readout is sufficient. However, its limitations narrow range, lack of digital features, and potential maintenance needs make it less ideal for applications demanding high precision, automation, or broad measurement ranges.

For users in laboratory settings, filtration systems, or low-pressure industrial processes where cost and compatibility are priorities, this gauge offers a reliable and straightforward solution. For applications requiring higher precision, digital outputs, or broader measurement ranges, a digital pressure sensor or a gauge with a wider range would be more appropriate.

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### **Recommendation**

- You are already using Millipore equipment and need a compatible, dual-range gauge for vacuum and low-pressure applications.

- Your application does not require digital outputs, data logging, or high precision.

- The operating range (30 VAC/30 PSI) aligns with your needs, and you prioritize simplicity and cost-effectiveness.

- You need measurements beyond 30 PSI or deep vacuum (e.g., for industrial or high-vacuum applications).

- Digital monitoring, automation, or data logging is required (in which case, a digital pressure sensor with 4-20 mA output or a programmable gauge would be better).

- Your environment involves harsh conditions (e.g., extreme temperatures, corrosive chemicals) that may degrade the gauge over time.

- You require multiple gauges or need to integrate with control systems (a multi-range gauge or a sensor with digital interfaces would be more versatile).

For most laboratory or low-pressure filtration applications, the Millipore 01-0138-C is a sound investment. However, always verify the gauge s specifications against your exact requirements to ensure it meets long-term needs.

Details:

Ideal for use in hydraulics, pneumatic, pumps, and plumbing systems, these pressure gauges provide accurate reliable measurements industrial business applications. The Millipore Span Pressure Gauge is a set of two 30 vacuum pressure gauges with maximum psi. Made in the USA by reputable brand Millipore, these gauges have a 1/4 inch connection diameter.

part #: 010138 prices

• $55.00-$318.75

specifications pressureswitchiz:

• brand: Millipore
• mpn: 01-0138-c
• part type: Pressure Gauge
• connection diameter: 1/4 In
• mounting position: Side/bottom Mount
• unit quantity: 1 Lot Of 2
• maximum pressure: 30 Psi
• country of origin: United States

seller pressureswitchiz:

• rating: 100.0%
• city: Brookfield, Connecticut
• # reviews: 11

general pressureswitchiz:

• condition: Used
• Business Industrial > Hydraulics, Pneumatics, Pumps Plumbing > Air Pressure Gauges

offer pressureswitchiz:

• availability: In Stock
• sold: 0
• started: April 2, 2026
• quantity: 1
• options: Ship-to-home
• best offers: True

payments pressureswitchiz:

• wallet: Paypal
• credit card: Discover
• other

shipping pressureswitchiz:

• service: UPS Ground Saver
• type: Calculated
• class: Economy
• carrier: UPS
• transit: 5-12 Days
• cost: $12.99

returns pressureswitchiz:

• policy: No Returns

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