4'' DIAL-VACUUM 1/2 BSP BOTTOM COMPLETE SS GLY FILLED

Dial Size: 4 inches (100 mm)Pressure Range: Vacuum range, typically 0 to -1 bar (or 0 to -30 inHg / 0 to -760 mmHg)Mounting Type: Bottom connection (Direct mounting)Process Connection: 1/2" BSP (British Standard Pipe) thread Liquid Filling: Glycerin filled (99.7% pure) for dampening vibrations and lubricating moving parts Material of Construction (MOC):Case & Bezel: Stainless Steel 304 or 316 (Crimped or Bayonet ring)Sensing Element (Bourdon Tube): Stainless Steel 316 Movement: Stainless Steel Socket/Connection: Stainless Steel 316 Window: Safety glass, toughened glass, or poly carbonate Dial: Aluminum, white background with black/red markings (dual scale often available)Pointer: Aluminum, black finish (micro-adjustable optional) Accuracy Class: ±1.0% or ±1.6% of Full Scale Value (typically Class 1 as per EN 837-1)Operating Temperature:Ambient: -20°C to +60°C Medium/Process: Maximum +60°C to +100°C (limited by the glycerin filling)Ingress Protection: IP65 or IP66 (weatherproof/dust proof)Blow-out Protection: Top or back blow-out disc/plug to safely release internal over pressure