none

HYGROMETERS KEEP CHECK ON ULTRA-HIGH-PRESSURE AIR

27-04-2017
by 
in 

Michell hygrometers, available from AMS Instrumentation & Calibration, play a crucial role in the preparation of UHP air for use in underwater applications.

UHP (ultra-high-pressure) air is supplied at up to 450bar(g), rather than the 7bar(g) typical of commercial compressed air. And because of this high pressure, the air used must be free from moisture, which would otherwise condense at such a high pressure.

One of the major applications for UHP air is in submarines, where the additional pressure makes it particularly useful for blowing ballast tanks to enable the boat to rise to the surface. However, the low subsea temperatures place even greater demands on the purity of the air, as any moisture could easily turn to ice and, blocking or damaging equipment and disabling the submarine.

Australian company S.A. Marine specialises in evaluating and testing UHP air systems. The company uses a desiccant dryer to remove any vapour from the air. And an online Michell hygrometer is used to measure the water dew point at delivery. The Michell hygrometer has a ceramic impedance sensor that can measure the dew-point temperature at line pressure, complete confidence in the measurements.

They S.A. Marine also offers an inspection service for breathing air cylinder-filling apparatus for both naval and commercial customers. In this application, excessive moisture can allow bacteria to grow and pose health problems for the users. In this instance, S.A. Marine uses a Michell chilled mirror hygrometer as a high-precision calibration reference on a test rig at its headquarters.

According to Greg Fahill, MD of S.A. Marine: “Michell offers the only hygrometers we have found to be reliable at UHP conditions.”

AMS Instrumentation & Calibration
03 9017 8225
www.ams-ic.com.au

Related news & editorials

  1. 17.05.2019
    17.05.2019
    by      In
    element14 has further expanded its product range with GW Instek test and measurement instruments, including programmable power supplies, electrical safety testers, signal sources and power analysers, all of which offer excellent quality at affordable cost.
    The APS-7050 programmable linear AC power... Read More
  2. 17.05.2019
    17.05.2019
    by      In
    Mouser Electronics stocks the PAN1762 series RF module from Panasonic, an ultra-low-power Bluetooth Low Energy 5.0 module that enables the transmission of large amounts of data in connectionless environments, providing a compact solution for IoT, beacon and mesh network applications.
    The module is... Read More
  3. 16.05.2019
    16.05.2019
    by      In
    US-based tooling components manufacturer Kennametal has released its new Mill 4-12, the next generation of tangential shoulder mills, which can produce high-quality floor surface finishes for nearly all steel and cast iron applications.
    “The Mill 4-12 uses 15 per cent lower cutting forces, an... Read More
  4. 16.05.2019
    16.05.2019
    by      In
    Mouser Electronics and US-based electronics components manufacturer Bourns have produced an eBook offering an in-depth look at circuit protection for power and data ports. Circuit Protection Simplified provides insights and strategies for protection of data and Ethernet ports, DC power supplies and... Read More