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Frequently Asked Questions - Gauges
  • Which gauges can I use for chlorine gas applications?
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    • USABlueBook carries gauges with your choice of PVDF or Hastelloy-C gauge guards. Gauge guard chambers are filled with fluorolube instead of mineral oil to eliminate the potentially serious problems associated with mineral oil accidentally mixing with chlorine gas. Gauges with Monel internals are also available and these can be used in direct contact with chlorine gas.
  • I received several gauges and noticed that the needles are not pointing directly to "0". Does this mean that the gauges won't read the same?
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    • No. Many gauge manufacturers, including some of our suppliers, no longer use pegs for the needle to rest against at the "0" position. Some manufacturers actually paint a wide "0" range mark on the faceplate. Gauges should be selected so that actual operating pressure is 50% of maximum gauge pressure or somewhere in the middle third of the gauge scale. Readings just above the "0" mark are going to be questionable from the standpoint of accuracy.
  • Why do I need a Diaphragm Seal on my Gauge?
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    • A diaphragm seal is a device that is attached to the inlet connection of a pressure instrument to isolate its measuring element from the process media. Used in a variety of process applications where corrosives, slurries, or viscous fluids may be encountered, the diaphragm seal affords protection to the instrument where the process fluid being measured would normally clog the pressure element or pressure element materials capable of withstanding corrosive effects.
  • I maintain a pressure reading of 55psi in my application. What pressure range should I order for my new gauge?
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    • You should order a 0-100psi Pressure Gauge. It is best to operate at its midpoint for the best accuracy and to protect against overload.
      Note: A pressure snubber is recommended for added protection against pressure spikes.
  • I cannot find the exact gauge I am looking for. What can I do?
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    • We encourage you to contact your Technical Support Team... US! We are fully staffed with experienced technicians that can handle all of your special order needs!
  • What type of gauge should I order if there is vibration or pulsation on the line?
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    • Liquid-filled gauges absorb shock, provide pointer stability, and protect against internal damage. They are designed to perform in rugged applications and harsh environmental conditions.
  • What are the benefits of Digital Gauges?
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    • Digital displays give you an exact measurement without the guesswork of pointers. Digital gauges also offer multiple measuring units for a wider array of measuring choices. Other options include Light-Powered gauges where batteries are not utilized as well as Backlit displays.
  • What gauge do I need for Tank Level Measurement?
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    • Water Level / Altitude Gauges
      These gauges are great for monitoring water tanks, tower levels, stand pipes and reservoirs. Dual scales read PSI and FT of elevation.
  • Is there a gauge out there that will display a Max Pressure reading?
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    • Yes! We offer gauges that have a “max pointer” option, which allow you to verify the highest pressure reading your gauge has witnessed. USABluebook also offers gauges with adjustable indicator to show normal levels or a danger zone.