Description
1. Overview of the Diaphragm Pressure Gauge MT-P100SD
The Diaphragm Pressure Gauge MT-P100SD is a precision pressure measurement device designed for applications where standard Bourdon tube pressure gauges are not suitable, especially when dealing with low pressure ranges or slightly viscous, crystallizing, or corrosive media. Diaphragm pressure gauges operate using a flexible diaphragm element that deflects proportionally to pressure changes, translating that motion into a readable indication on the dial. This ensures high measurement stability and accuracy even at lower pressures where Bourdon tubes may provide less reliable readings.
The MT-P100SD model is widely used in industries such as chemical processing, water treatment facilities, food and beverage manufacturing, pharmaceutical production, and general industrial measurement where clean and controlled pressure monitoring is essential.
2. Key Technical Features
The Diaphragm Pressure Gauge MT-P100SD comes with the following specifications:
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Dial Sizes Available:
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100 mm (4″)
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160 mm (6″)
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Measurement Range Options:
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-1…0…25 bar
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16…600 mbar
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Mounting Configuration:
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Bottom connection
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Direct pattern mounting for panel or surface installations
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Process Connection:
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½” NPT (M) threaded connection
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Ingress Protection:
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IP65, suitable for industrial environments with dust and mild moisture exposure
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Execution:
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Dry type, without glycerin filling for fast pointer movement and responsive adjustment reading
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These features make the MT-P100SD versatile in both low-pressure and medium-pressure industrial applications.
3. Working Principle of the Diaphragm Pressure Gauge
The Diaphragm Pressure Gauge MT-P100SD measures pressure through a flexible diaphragm made typically of stainless steel. When pressure from the process medium is applied to the diaphragm, it deflects proportionally. The deflection is transmitted through a mechanical linkage to the movement mechanism, which controls the pointer indicating the pressure level on the scale.
This principle offers major advantages:
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High sensitivity for low pressure and vacuum measurement
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Excellent accuracy even with fluctuating or pulsating pressure
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Ability to measure slightly contaminated, humid, or viscous gases (in some configurations)
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Longer lifespan where Bourdon tubes may fatigue over time
This makes diaphragm pressure gauges particularly valuable for sensitive or critical control systems.
4. Construction and Materials
The Diaphragm Pressure Gauge MT-P100SD is designed to provide robust performance in various industrial environments. Typical construction considerations include:
| Component | Material | Purpose |
|---|---|---|
| Diaphragm element | Stainless steel | Resistant to corrosion and pressure fatigue |
| Case | Stainless steel or coated metal | Protects internal mechanisms against shock and atmosphere |
| Movement mechanism | hardened components | Ensures pointer stability and long-term accuracy |
| Dial & pointer | High-contrast printed dial | Easy readability from different distances |
The combination of durable materials enhances reliability, especially in environments with vibrations, temperature fluctuations, or airborne particulates.
5. Dial Size and Visibility
The MT-P100SD is available in two dial sizes to accommodate different monitoring distances and installation layouts:
| Dial Size | Typical Use Environment |
|---|---|
| 100 mm (4″) | Compact machinery, local measurement points |
| 160 mm (6″) | Control rooms, long-distance monitoring areas, and safety-critical systems |
Larger dials improve readability in noisy or visually complex industrial environments, helping operators make quick and accurate evaluations.
6. Pressure Range Selection and Applications
The Diaphragm Pressure Gauge MT-P100SD supports both bar and mbar measurement ranges, suitable for:
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Low-pressure systems (e.g., air flow regulation, gas conditioning, burner draft control)
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Vacuum and near-vacuum systems (clean lab vacuum controls, aeration systems)
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Medium-range process pressures in water filtration and chemical dosing systems
Suitable applications include:
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Water treatment plants
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Gas distribution and regulation systems
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HVAC ventilation and pressure balance monitoring
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Pharmaceutical and biotechnology production rooms
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Clean room airflow regulation
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Chemical processing and acid-tolerant systems (depending on diaphragm material)
Because this gauge uses a diaphragm, it is more tolerant to slightly contaminated or humid gases than capsule-based gauges.
7. Mounting and Process Connection Configuration
The bottom connection with direct mounting pattern allows easy installation on pipelines, tanks, control boards, and pressure panels. The standardized ½” NPT (M) thread ensures compatibility with common industrial pressure ports and adapters.
Benefits of this mounting design include:
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Simple replacement and maintenance
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Reliable mechanical seating and sealing
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Flexibility for both field installation and factory-assembled systems
Engineers value this because it simplifies standardization across multiple pressure measuring points.
8. Ingress Protection and Operating Environment
With IP65 ingress protection, the Diaphragm Pressure Gauge MT-P100SD is protected against:
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Dust penetration that may interfere with internal mechanisms
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Splashes of water in industrial or outdoor environments
This makes the gauge suitable for:
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Food production lines (non-washdown zones)
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Boiler and steam plant rooms
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Outdoor air handling units under rain-protected housings
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Chemical system monitoring shelters
The dry execution ensures fast needle movement, which is essential for real-time pressure control adjustments.
9. Advantages of Choosing the MT-P100SD
Key benefits include:
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High sensitivity and accuracy in low pressure measurement
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Durable and stable diaphragm sensing element
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Clear dial readability, available in large formats
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Industrial-grade ingress protection
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Wide applicability across multiple process industries
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Low maintenance mechanical design
Engineers prefer this model when reliability, repeatability, and clear display are prioritized.
10. Conclusion
The Diaphragm Pressure Gauge MT-P100SD is a robust and precise instrument engineered for low and medium pressure gas measurement in industrial environments. Its diaphragm-based sensing system, multiple dial sizes, IP65 protection, and standardized NPT connection make it a highly reliable solution for HVAC systems, water treatment, chemical processes, laboratory settings, and gas distribution networks.
By ensuring stability, corrosion resistance, and easy visual monitoring, the MT-P100SD delivers dependable performance and long-term operational value.
