Digital Vacuum Absolute Pressure Gauge – Vac Checker®


Vac Checker® Digital Absolute Pressure Gauge for Vacuum Resin Infusion Processes

The heavy duty design qualifies this gauge particularly for the use in rough workshop environment. If the purpose of the vacuum infusion process is the production of high-quality parts, the use of a precise digital absolute pressure gauge is a must. The Vac Checker® measures the pressure difference relative to the absolute zero of pressure and is unaffected by changing environmental conditions such as weather or altitude. Unlike analog dial gauges, usually mounted on the vacuum pump or resin catch pot, you know exactly what is happening inside the vacuum bag.

Vac Checker® Resources:   Vacuum Basic Knowledge | Vac Checker® – Operating Manual

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Digital Vacuum Gauge – Vac Checker®

Your workshop conditions are rough but you need a precisely working digital vacuum gauge. The Vac Checker® is designed to support rugged working routines and survive tough, challenging environments. It allows to precisely gauge the process quality with digital precision and accuracy.

Benefits of the Vac Checker®

  • IP-certified – Protection class IP 42.
  • Drop-Proofed
  • Performance Indicator – the professional way to measure the low pressure value in which a high quality infusion process takes place
  • Displays the evaporation temperature of water with the respective pressure. You get an indication if embedded moisture starts boiling and increases the air volume to be evacuated. That gives an answer on why a possible stopping point during system evacuation occurs
  • Immediate reading of pressure changes with digital accuracy and a resolution of 0.1 mbar (0.01 hPa/10 micron). Leaks get found quickly which saves time with the setup of a perfect vacuum infusion process
  • Works properly with digital precision regardless of the environmental condition

Digital Vacuum Gauge – How it Works

The absolute pressure gauge Vac Checker® measures the actual pressure above the absolute zero (or perfect vacuum) of pressure within the bagged system. The pressure relative to absolute zero is called absolute pressure. Using absolute zero pressure as a reference point provides a reliable and accurate measurement of vacuum levels. It is a fixed point of reference and not influenced by environmental factors.

A conventional dial type vacuum gauge measures the pressure differential below the atmospheric pressure surrounding the gauge, outside the bagged system. We see this type of gauge typically mounted on resin catch pots or vacuum pumps.

Vacuum Level and Part Quality

With high quality vacuum resin infusion processes it is important to know what is going on within the evacuated system. Because the in-bag pressure correlates with the amount of air left in the system which in turn correlates with the porosity and amount of voids in the composite part.

An example makes it plausible. Pulling down vacuum from 1000mbar atmospheric pressure to 100mbar absolute pressure leaves 10% air in the system. Pulling down to 10mbar leaves only 1% air. Less air implies less voids and better quality.

Importance of Resolution

To produce high quality vacuum resin infusion parts a vacuum range of 2mbar – 20mbar is required within the bagged system. A traditional dial type gauge shows variations in a range between 1 and 3% of full scale. The reason is the inaccuracy of the mechanism within the gauge and environmental variables. It is obvious that a gauge with a total accuracy of ±55 mbar is not an appropriate instrument for measuring an in-bag vacuum of 2 to 20 mbar. Also the scale division does not allow such a precise reading.

The Vac Checker® is an absolute vacuum pressure gauge with a resolution down to 0.1mbar. Designed for rough shop envronments it has proven its quality to composite experts and Todays leading composites manufacturers. The gauge makes it possible to detect changes in pressure precisely and instantly which saves time and money during process setup. It also works as an excellent performance indicator for the quality of the produced composite components.

Data specification

– Operation temperature: -20 up to +50 °C
– Dimensions: 250 x 165 x 55 mm (9.84 x 6.5 x 2.16 inch)
– Weight: approx. 415 g
– Battery type: 2 mignon cells AA
– Protection class: IP 42
– Measurement transducer: Absolute pressure sensor, 6 bar / 87 psi
– Measuring range: 1.100 bis 0 mbar
– Resolution: 0,01 hPa / 10 micron
– Parameter: mmHg, Torr, mbar, hPa, micron, inH2O, inHg, Pa
– Overload (rel): 5 bar (rel) / 72 psi (rel)
– Attachments: Connection adapters for hoses with an internal diameter of:

– 6 mm
– 8 mm
– 10 mm

Vac Checker® Resources:   Vacuum Basic Knowledge |   Vac Checker® – Operating Manual


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