Longacre Liquid Filled 2½” GID Tire Gauge 0-15 by ¼ lb Dual Bleed

Longacre Liquid Filled 2½” GID Tire Gauge 0-15 by ¼ lb Dual Bleed

59.99

Visit ‘Additional Info’ to understand the benefits of Liquid Filled Tire Gauges. However, one of their disadvantages is that external temperature changes can alter the readings by as much as 2-3 PSI.

To counteract this issue Longacre has installed a specially designed pressure equalizer valve on the top of the gauge. Before using this gauge loosen the knob on top of the gauge 1/4 turn, then hand retighten. Instantly any temperature-caused pressure differences will be eliminated and a guaranteed accurate reading is achieved.

2 1/2" Deluxe Gauge with protective bumper

  • 1/4 lb. increments with 2% accuracy

  • 17" hose with swivel angle chuck installed with alternate ball chuck included

  • Dual bleed air pressure release buttons for faster setting

  • HOLDS PRESSURE READING UNTIL RELEASED

  • Glow-in-the-Dark dial face

  • Specially designed vent valve to equalize pressure and maintain gauge accuracy

52-52032

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Liquid-filled pressure gauges are available in pressure ranges equal to or higher than their dry counterparts. Their casings are filled with fluid, usually glycerine, although silicone or other liquids are sometimes used. The liquid coats the internal parts and is visible on the gauge's face. Having the liquid inside works to dampen the effect of pulsation and pressure spikes - which is another advantage over choosing a dry gauge. This means the pressure gauges are less likely to give inaccurate readings due to wear and tear that mechanical vibration and pulsation tends to cause. The liquid in these pressure gauges does double duty when it comes to fighting those effects. Not only does it help mitigate the effect of vibration, the liquid also lubricates the gauge's moving parts, reducing everyday friction. The filling also has the benefit of preventing internal corrosion. As the bourdon tube and movement are covered by a liquid that keeps moisture and other corrosive substances at bay. All of those factors add up to longer service life and lower replacement costs for liquid-filled pressure gauges over dry pressure gauges. And in environments where vibration and condensation are a factor, they are definitely a consideration. (Direct Material)

Liquid Filled vs. Traditional Gauges

The primary reason for gauge failure is vibration. In traditional dry gauges, delicate links, pivots, and pinions are prone to damage from vibration, leading to inconsistent performance. In a liquid-filled gauge, the fluid fill effectively dampens system pulsation, making the gauge pointer easier to read.

Likewise, humidity and moisture pose problems for dry gauges. Condensation can make a gauge difficult to read or, in some cases, can cause failure due to icing. Liquid-filled gauges, though, are sealed to prevent internal condensation, and by keeping moisture out of the system, gauge movement is protected during icing conditions.

The choice of fill fluid is based on the application, but glycerin is typically used for room-temperature applications and silicone oil is commonly used for extreme temperature applications, especially when icing is a problem. An oil with insulating properties is ideal if the system has exposed electrical contacts.

Why Liquid Filled?

Liquid-filled pressure gauges offer a number of advantages over traditional, dry case pressure gauges:

  • Liquid-filled gauges have longer lives than traditional (non-hermetically-sealed) gauges because of their viscous fluid filling. Over time, this design advantage results in costs savings due to lowered instrumentation costs as well as lessened unscheduled downtime.

  • Internal liquids protect against severe temperature fluctuations and vibrations—major factors in the breakdown of regular gauges. Because they dampen temperature spikes and vibrations, WIKA’s liquid-filled gauges are easier to read, allowing for greater accuracy and process control.

  • In traditional gauges, condensation build-up results in visibility issues. This can be a crucial (and costly) flaw in high-humidity environments—an unreadable gauge is a worthless gauge. A solution to the impact of high humidity situations, WIKA’s liquid-filled gauges are designed to prevent moisture from entering not only the body casing but also the inside of the case lens.

  • Because they are sealed and constructed to meet rugged specifications, liquid-filled gauges are commonly used in highly corrosive chemical processes or in manufacturing or refining processes, and where products must be transported, stored, or handled in extreme temperature conditions. (WIKA US)