Description
Digital Vacuum Absolute Pressure Gauge – GDH 200-14
Consistently producing high-quality vacuum resin infusion components is easy with the right equipment. The “Made in Germany” GDH 200-14 is a digital vacuum absolute pressure gauge. Composite experts and technicians rely on this lightweight and handy gauge to set up and monitor the production process.
Benefits of GDH 200-14:
- Lightweight and handy design – The GDH 200-14 weighs only 150 gr./5.3 oz.
- Works properly with digital precision regardless of the environmental conditions
- High performance reading supports a reliable process setup for high-quality output
- Indicates without delay and with a resolution of 1 mbar(0.02953 inHG) if a leak has been found. Thus it saves time with the setup of a perfect vacuum infusion process
- Performance Indicator – The only way to measure the pressure value in which a high quality infusion process takes place
- Enables a performance check of the vacuum pump
How it Works
An absolute pressure gauge measures the actual pressure above the absolute zero (or perfect vacuum) of pressure within the bagged system. Whereas a conventional dial type vacuum gauge measures the pressure differential below the atmospheric pressure surrounding the gauge and outside the system.
The latter varies widely with changes in weather conditions and altitude of the measuring point. We typically find this type of gauge mounted on resin catch pots or vacuum pumps.
There are good reasons why resin infusion experts rely on an absolute vacuum pressure gauge. Especially when it comes to set up and monitor a high-quality vacuum resin infusion process. Using the absolute zero of pressure as a reference point provides far more accurate measurements of vacuum levels. It is a fixed point and uninfluenced by environmental factors. Simply speaking, the absolute pressure value indicates the amount of air remaining in the closed system. And the less air the better the achieved quality of the produced composite laminate.
Importance of Accuracy
A high-quality vacuum resin infusion process or prepreg work usually takes place in the 2mbar to 20mbar range of absolute in-bag pressure. In order to confirm that a bag has been evacuated to this degree of vacuum, the gauge used needs to be accurate in this region. This is practically impossible for conventional dial type gauges. It will experience inaccuracies of at least ±55 mbar due to changing environmental conditions and the imprecise mechanism within the gauge. Also the scale division is not appropriate for that purpose. It is obvious that such a vacuum gauge is not suitable for measuring an in-bag vacuum below 20 mbar.
Our solution is the GDH 200-14. It has proven its quality to composite experts and Todays leading composites manufacturers. The ability to detect changes in pressure precisely and instantly saves time and money during the process setup. It is also an excellent performance indicator for the quality of the vacuum infusion process and the produced products.
GDH 200 Resources: Vacuum Basic Knowledge | GDH 200 – Operating Manual | GDH 200 – Spec Sheet
Steve J. –
perfect tool to check vacuum integrity
Jim Benzel –
Only way to go. Let’s you know if you have a microscopic leak, whereas a regular dial gauge may not. Good bag with no leaks = good part. Bad bag with a microscopic leak = bad quality part, appearance and structural. Some may think it’s kinda pricey, but I make medium to large carbon parts, the cost of losing one part is much more than the cost of this unit. I have 2. I don’t infuse until this gauge shows I have perfect bag.