What Is This Tool?
This converter transforms pressure measurements from millimeter water (4°C), a unit for very small hydrostatic pressures, into ton-force (long)/square inch, a legacy Imperial unit representing larger pressures as weight per area. It assists users dealing with diverse pressure units in contexts such as HVAC, historical engineering, and industrial settings.
How to Use This Tool?
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Enter the pressure value in millimeter water (4°C)
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Select millimeter water (4°C) as the input unit
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Choose ton-force (long)/square inch as the output unit
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Click convert to see the equivalent pressure value
Key Features
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Converts low-pressure millimeter water (4°C) values to ton-force (long)/square inch
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Supports interpretation of historical British engineering pressure units
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Generates precise conversion results for a small-to-large pressure range
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Browser-based and easy to use without installation
Examples
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10 Millimeter water (4°C) equals 6.3495320112624e-6 Ton-force (long)/square inch
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100 Millimeter water (4°C) equals 6.3495320112624e-5 Ton-force (long)/square inch
Common Use Cases
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Measuring very low pressures in HVAC systems and cleanroom environments
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Calibrating and specifying low-range pressure sensors in laboratories
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Interpreting historical engineering documents specifying bearing pressures
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Rating capacities of older industrial presses and forging machinery
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Converting legacy Imperial pressure data for modern analysis or redesign
Tips & Best Practices
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Ensure input values represent very low pressure ranges suitable for millimeter water (4°C)
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Use the converter when working with legacy British engineering standards
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Handle converted values carefully, as outputs are very small decimals
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Cross-check units especially when updating or converting older technical specifications
Limitations
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Millimeter water (4°C) is only appropriate for very small pressures
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Ton-force (long)/square inch is a large and mostly legacy unit, not common in modern standards
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Resulting conversion values are often very small decimals requiring precise handling
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The unit ton-force (long)/square inch may not be recognized in current engineering contexts
Frequently Asked Questions
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What does millimeter water (4°C) represent?
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It is the pressure exerted by a 1 mm column of pure water at 4°C under standard gravity, used for very small pressure measurements.
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When is ton-force (long)/square inch used?
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It is used historically in British engineering to express pressure as force of one long ton over one square inch, common in heavier machinery contexts.
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Why convert between these two units?
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Converting helps translate small hydrostatic pressures into legacy Imperial pressure units often found in older technical and engineering documents.
Key Terminology
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Millimeter Water (4°C)
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A unit of pressure equal to the hydrostatic pressure exerted by a 1 mm column of water at 4 degrees Celsius under standard gravity.
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Ton-force (long)/square inch
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A legacy Imperial unit of pressure defined as the force of one long ton distributed over one square inch area.
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Hydrostatic Pressure
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Pressure exerted by a fluid at rest due to the force of gravity.