Brooks Instrument 122 Series Mechanical pressure gauges have been designed and developed for demanding high-purity applications in the semiconductor industry. Our mechanical pressure gauges are made of stainless steel with an accuracy of 1% of full range. These two inch gauges are durable measuring devices with a variety of process connections, pressure ranges and socket directions to provide reliable, up-to-date local pressure monitoring. Obtain accurate, high performance results from the best gauge suppliers.