SJ 壓力計：壓力計或隔膜式壓力計，由於其測量原理，其連接器會與壓力源（介質）接觸。對於具有腐蝕性的流體，我們通常會選擇具有塑膠接頭或隔膜的壓力計。以下列出壓力計常見的塑膠材質，以及其對不同壓力源的耐腐蝕性（資訊僅供參考，實際情況可能會有所差異，請依賴現場經驗進行準確評估）：
| 常見壓力錶塑膠材料耐腐蝕表 符號說明： ✓:高耐受性，○：適合 X: 不建議 ⊗:部分適用（例如，在高濃度或有濕氣的情況下）。. | |||||||
| 類別 | 姓名 | 公式 | PP | PVC | PVDF | PTFE | PFA |
| 水 | H2O | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 氫 | H2 | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 一氧化氮 | N2O | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 過氧化氫 | H2O2 | ○ | ✓ | ○ | ✓ | ✓ | |
| 酸 | 鹽酸 | 鹽酸 | ✓ | ✓ | ✓ | ✓ | ✓ |
| 硝酸 | HNO3 | ○ | ✓ | ✓ | ✓ | ✓ | |
| 硫酸 | H2SO4 | ○ | ✓ | ✓ | ✓ | ✓ | |
| 硫化氫 | H2S | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 碳酸鹽 | H2CO3 | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 磷酸 | H3PO4 | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 鉻酸 | H2鉻氧化物4 | ○ | ✓ | ○ | ✓ | ✓ | |
| 氫氟酸 | HF | ○ | ○ | ✓ | ✓ | ✓ | |
| 氯酸 | HClO3 | ○ | ✓ | ✓ | ✓ | ✓ | |
| 二氧化硫 | SO2 | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 鹼 | 氫氧化鈉 | NaOH | ✓ | ✓ | ✓ | ✓ | ✓ |
| 氨氣 | NH3 | - | - | - | ✓ | ✓ | |
| 鹽 | 硝酸銨鹽 | NH4無3 | ✓ | - | ✓ | ✓ | ✓ |
| 硫酸銨 | (NH4)2SO4 | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 硫酸銨 | Al2 (SO4)3 | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 硫酸鹽 硫酸鹽 | 硫酸鹽 | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 碳酸氫銨 | NH4HCO3 | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 碳酸鈉 | Na2CO3 | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 碳酸氫鈉 | NaHCO3 | ○ | ✓ | ✓ | ✓ | ✓ | |
| 氯化銨 | NH4CI | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 氯化鉀 | KCI | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 氯化鐵 FeCl3 | FeCl3 | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 次氯酸鈉 | NaOCl | ○ | ✓ | ✓ | ✓ | ✓ | |
| 水性 | 礦泉水 | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 污水 | ✓ | ✓ | ✓ | ✓ | ✓ | ||
| 鹽水 | ✓ | ✓ | ✓ | ✓ | ✓ | ||
| 30% NaCl | ✓ | ✓ | ✓ | ✓ | ✓ | ||
| 啤酒 | ✓ | ✓ | ✓ | ✓ | ✓ | ||
| 果汁 | ✓ | ✓ | ✓ | ✓ | ✓ | ||
| 毒性 | 硫磺 | 硫磺 | - | - | - | ✓ | ✓ |
| 氯氣 | Cl2 | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 氯水 | 氯化水 | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 溴氣 | 布爾2 | X | X | ⊗ | ✓ | ✓ | |
| 光氣 | COCI2 | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 有機 | 有機醋酸 | CH3COOH | ✓ | ✓ | ✓ | ✓ | ✓ |
| 醋酸銨 | CH3COONH4 | ✓ | - | - | ✓ | ✓ | |
| 甘油 | 甘油 | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 二甲苯 | C8H10 | X | X | ○ | ✓ | ✓ | |
| 甲醇 | CH3OH | ○ | ✓ | ✓ | ✓ | ✓ | |
| 乙醇 | C2H5OH | ○ | ✓ | ✓ | ✓ | ✓ | |
| 甲烷 | CH4 | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 二氯乙烯 | C2H4CI2 | X | X | ✓ | ✓ | ✓ | |
| 氯仿 | CHCI3 | X | X | ✓ | ✓ | ✓ | |
| 氯乙烯 | C2HCI3 | X | X | ✓ | ✓ | ✓ | |
| 醋酸纖維素 | 醋酸纤维素 | - | - | - | ✓ | ✓ | |
| 檸檬酸 | C6H8O7 | ○ | ⊗ | ✓ | ✓ | ✓ | |
| 原油 | 原油 | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 氟利昂 | 氟利昂 | ✓ | ✓ | ✓ | ✓ | ✓ | |
