| Stainless Steel Internals | Brass Internals |
| Dial | 2.5” (63mm), 4” (100mm), 4.5″ (115mm), 6” (150mm) white aluminum with black and red markings | 4” (100mm), 4.5″ (115mm) white aluminum with black and red markings |
| Case | AISI 304 SS | AISI 304 SS |
| Lens | Polycarbonate,High pressure BSP(G) and HP: Tempered safety glass | Polycarbonate |
| Ring | AISI 304 SS | AISI 304 SS |
| Socket | 316L SS2.5″ (63mm), 4″ (100mm), 4.5″ (115mm): Welded one-piece socket | OT 58 brass |
| Connection | 1/4” NPT or 1/2” NPT standard2.5” (63mm): 1/4” NPT standard only,High Pressure: 1/2″ BSP(G) or 9/16″ (HP or HP autoclave w/gland) | 1/4” NPT or 1/2” NPT standard |
| Bourdon Tube | 316L SS, drawn seamless | Phosphor bronze |
| Movement | 304 SS (under and overload stops 4″ to 6″) | OT 59 brass (under and overload stops 4″) |
| Pointer | 2.5” (63mm): Aluminum, anodized black,4” (100mm), 4.5″ (115mm), 6” (150mm): Aluminum, anodized black, micrometer adjustable | 4” (100mm), 4.5″ (115mm): Aluminum, anodized black, micrometer adjustable |
| Welding | Laser welded socket to case | Silver alloy |
| Fill Liquid | Glycerin | Glycerin |
| Over-pressure Limit | 25% for pressures up to 1,450 psi (9,998 kPa),15% for pressures over 1,450 psi (9,998 kPa) | 25% for pressures up to 1,450 psi (9,998 kPa),15% for pressures over 1,450 psi (9,998 kPa) |
| Socket Gasket | 2.5” (63mm), 4″ (100mm), 4.5″ (115mm): Welded (no gasket)6” (150mm): Buna N for one-piece external socket seal (silicone rubber option) | 4″ (100mm), 4.5″ (115mm): Buna N for two piece internal socket seal |
| Fill Plug | Buna N (silicone rubber option) | Buna N (silicone rubber option) |
| Lens Ring Gasket | Buna N (silicone rubber option) | Buna N (silicone rubber option) |
| Working Pressure | Maximum 75% of full scale value | Maximum 75% of full scale value |
| Ambient Temperature | Dry: -40°F to 250°F (-40°C to 120°C)Glycerin filled: -4°F to 150°F (-20°C to 65°C) | Dry: -40°F to 200°F (-40°C to 93°C)Glycerin filled: -4°F to 150°F (-20°C to 65°C) |
| Process Temperature | -40°F to 250°F (-40°C to 120°C) | -40°F to 200°F (-40°C to 93°C) |
| Accuracy | 2.5” (63mm): ±1.5% of full scale4” (100mm), 4.5″ (115mm), 6” (150mm): ±1% ANSI/ASME Grade 1A | ±1% ANSI/ASME Grade 1A |
