This is one of DirectMaterial.com's most popular vacuum gauges, with its easily readable dial, a stainless steel case that protects against harsh environments and the glycerin oil filling that promotes longer service life. As far as manometers go, this is a great choice for water, oil, gas, diesel or other hydraulic applications. It is available in several vacuum and compound ranges.
1-1/2", 2", 2-1/2" and 4" Dial Sizes (Crimped Casing)
Dual Scale - PSI / Bar
Stainless Steel case for protection in harsh environments
Copper Alloy Lower Mount; NPT (1/8" for 1-1/2" dial; 1/4" for 2", 2-1/2" or 4" dial; 3/8" and 1/2" also available for 4" dial)
Normal Ambient Temp.:
-4F to +140F (-20C to +60C)
Glycerin oil filled to enhance the reliability and integrity;
helps dampen the effect of vibration and pulsation;
lubricates the movement and extends the life of gauge.