Capsule Vacuum Gauge, Dial Size 4″ (100 mm), Range -1000 mmWc to 0 With Dual Scale of -100 mBar to 0, Direct Mounting Bottom Entry, 3/8″ BSP (M) Connection, SS Case & SS Wetted Parts (Case Bayonet Type)

Description

Capsule Vacuum Gauge, 4″ (100 mm) Dial, Range -1000 mmWC to 0 with Dual Scale -100 mBar to 0, Bottom Entry, 3/8″ BSP (M), SS Case & SS Wetted Parts, Bayonet Type

High Accuracy Low Pressure Vacuum Measurement Solution for Industrial Applications

The “Ji” Japsin Instrumentation Capsule Vacuum Gauge is a precision-engineered low-pressure measuring instrument designed specifically for accurate vacuum measurement in applications where conventional bourdon tube pressure gauges cannot provide the required sensitivity. Featuring a 4-inch (100 mm) dial size, vacuum range of -1000 mmWC to 0, dual scale of -100 mBar to 0, bottom entry mounting, 3/8″ BSP male connection, and stainless steel case with stainless steel wetted parts, this industrial-grade capsule vacuum gauge delivers reliable and repeatable performance in demanding process environments.

Manufactured using high-quality stainless steel components and a sensitive capsule sensing element, this vacuum gauge is ideal for monitoring low vacuum conditions in HVAC systems, clean rooms, air handling units, filtration systems, dust collection equipment, pharmaceutical plants, chemical industries, laboratories, and various industrial processes requiring precise vacuum measurement.

The robust bayonet-type case construction allows easy maintenance and calibration while ensuring long service life and dependable operation even under challenging industrial conditions.

Designed for Accurate Low Vacuum Measurement

Many industrial applications require the measurement of very low pressures or vacuum levels that are beyond the sensitivity range of standard bourdon tube gauges. In such applications, a capsule vacuum gauge provides significantly higher sensitivity and accuracy.

The “Ji” Japsin Instrumentation Capsule Vacuum Gauge utilizes a specially designed capsule sensing element that expands and contracts in response to small pressure changes. This movement is transferred through a precision linkage mechanism to the pointer, providing highly accurate indication of vacuum levels.

This design makes the instrument particularly suitable for low-pressure and vacuum applications where precise monitoring is essential for maintaining process efficiency and equipment performance.

Vacuum Range -1000 mmWC to 0

The gauge is calibrated to measure vacuum from -1000 mmWC to 0 mmWC, allowing accurate monitoring of low-pressure vacuum systems.

Vacuum Scale

• Primary Scale: -1000 mmWC to 0
• Secondary Scale: -100 mBar to 0

This range is commonly used in applications involving air, gas, ventilation systems, dust extraction systems, filtration monitoring, and environmental control processes.

The wide vacuum range provides operators with a clear indication of system performance and allows rapid identification of blockages, leaks, or abnormal operating conditions.

Dual Scale Display for Operational Convenience

The gauge features a dual-scale dial calibrated in both:

• Millimeters Water Column (mmWC)
• Millibar (mBar)

This dual-unit display eliminates the need for manual conversion and allows operators to work with whichever unit is most suitable for their application.

Benefits of Dual Scale Display

• Improved readability
• Easy interpretation of measurements
• Reduced calculation errors
• Suitable for international applications
• Enhanced operational efficiency

The clearly marked dial ensures quick and accurate pressure monitoring in both process and maintenance environments.

Sensitive Capsule Element Technology

The core sensing component of this gauge is the precision-engineered capsule element.

Unlike bourdon tube gauges that are generally used for medium and high pressures, capsule gauges are specifically designed for low-pressure and vacuum applications.

Advantages of Capsule Technology

• High sensitivity
• Excellent low-pressure measurement capability
• Stable performance
• Accurate response to small pressure variations
• Reliable long-term operation

The capsule element provides superior measurement accuracy for low-pressure systems where small changes in pressure can significantly impact process performance.

Large 100 mm Dial for Easy Visibility

The gauge is equipped with a 4-inch (100 mm) dial, ensuring excellent readability even from a distance.

Benefits of Large Dial Size

• Easy monitoring by operators
• Reduced reading errors
• Improved visibility in industrial environments
• Quick pressure verification
• Suitable for plant and process installations

The large dial face is particularly beneficial in process plants where operators need to monitor equipment from several feet away.

Stainless Steel Case Construction

The instrument is housed in a high-quality stainless steel case designed to withstand demanding industrial environments.

Advantages of Stainless Steel Construction

• Excellent corrosion resistance
• Long service life
• Resistance to harsh environmental conditions
• Improved mechanical protection
• Professional industrial appearance

The stainless steel case ensures reliable operation in both indoor and outdoor installations.

Stainless Steel Wetted Parts

All pressure-contacting components are manufactured from stainless steel to provide superior corrosion resistance and media compatibility.

Benefits

• Suitable for air and non-corrosive gases
• Improved durability
• Reduced maintenance
• Longer operating life
• Resistance to moisture and contaminants

The stainless steel wetted parts help maintain measurement accuracy even in challenging operating conditions.

Bayonet Type Case Design

The gauge features a bayonet-type case construction that simplifies maintenance and calibration procedures.

Advantages

• Easy access to internal components
• Simplified servicing
• Convenient recalibration
• Reduced maintenance downtime
• Enhanced serviceability

This design is preferred in industrial environments where periodic calibration and maintenance are required.

Direct Mounting Bottom Entry Configuration

The gauge is supplied with a bottom entry connection suitable for direct installation on equipment and process lines.

Benefits

• Easy installation
• Improved visibility
• Secure mounting
• Common industrial configuration
• Reduced installation complexity

The bottom entry arrangement is widely used across process industries and HVAC systems.

Standard 3/8″ BSP Male Connection

The instrument is equipped with a 3/8″ BSP male process connection, providing compatibility with standard industrial fittings.

Advantages

• Easy integration into existing systems
• Reliable sealing performance
• Leak-free installation
• Standard industrial compatibility
• Simplified maintenance

The BSP connection allows quick installation and replacement when required.

Industrial Applications

The “Ji” Japsin Instrumentation Capsule Vacuum Gauge is suitable for a wide range of low-pressure and vacuum measurement applications.

1. HVAC Systems

Used for monitoring air flow, filter conditions, and ventilation system performance.

2. Air Handling Units (AHUs)

Measures negative pressure conditions across filters and ducts.

3. Dust Collection Systems

Monitors vacuum levels to ensure effective dust extraction and collection.

4. Clean Rooms

Maintains proper differential pressure conditions for contamination control.

5. Pharmaceutical Industry

Used in controlled environments and process monitoring applications.

6. Chemical Processing Plants

Monitors low-pressure gas and air systems.

7. Laboratories

Suitable for vacuum testing and environmental monitoring applications.

8. Industrial Ventilation Systems

Provides accurate vacuum indication in ventilation and exhaust systems.

9. Pollution Control Equipment

Used for monitoring filter performance and airflow conditions.

Importance of Vacuum Monitoring

Accurate vacuum measurement helps maintain:

• Process efficiency
• Equipment performance
• Energy savings
• Product quality
• Environmental compliance
• Operational safety

Monitoring vacuum conditions can help identify:

• Filter blockages
• Air leaks
• System inefficiencies
• Equipment malfunctions
• Process deviations

Early detection of such issues reduces downtime and maintenance costs.

Long-Term Reliability

The combination of a stainless steel case, stainless steel wetted parts, and precision capsule technology ensures dependable long-term performance.

Reliability Features

• Corrosion-resistant construction
• Stable calibration characteristics
• Durable internal mechanism
• Low maintenance requirements
• Extended service life

These features make the gauge suitable for continuous industrial operation.

Why Choose “Ji” Japsin Instrumentation Capsule Vacuum Gauge?

The “Ji” Japsin Instrumentation Capsule Vacuum Gauge combines precision measurement, durable stainless steel construction, and dependable performance for low-pressure vacuum applications. With its -1000 mmWC to 0 vacuum range, dual scale in mBar, 100 mm dial size, stainless steel construction, and sensitive capsule sensing technology, it provides accurate and reliable vacuum indication across a broad range of industrial applications.

Whether used in HVAC systems, clean rooms, filtration systems, pharmaceutical facilities, laboratories, or industrial ventilation systems, this capsule vacuum gauge delivers the accuracy, durability, and performance required to maintain efficient and reliable operations. For industries seeking a professional-grade low-pressure vacuum measurement solution, “Ji” Japsin Instrumentation offers quality and reliability you can trust.

Japsin Instrumentation – Since 1974