| No. | Picture | Model | Description | Brand | Action |
|---|
| 1. |  | 1638-10 | Differential pressure switch, range:3-12" w.c. | Dwyer |  |
| 2. |  | 1823-2 | Low differential pressure switch, range:0.5-2.0" w.c. | Dwyer | |
| 3. |  | 1823-5 | Low differential pressure switch, range:1.5-5.0" w.c. | Dwyer | |
| 4. |  | 1824-5-2-S | Low differential pressure switch,range:1.5-5.0" w.c, SPDT,UL/FM/CSA | Dwyer | |
| 5. |  | 1910-0 | Low differential pressure switch,range:0.15-0.55" w.c, SPDT | Dwyer | |
| 6. |  | 1910-00 | Low differential pressure switch,range:0.07-0.15" w.c, SPDT | Dwyer | |
| 7. |  | 1910-1 | Low differential pressure switch,range:0.40-1.6" w.c, SPDT | Dwyer | |
| 8. |  | 1910-10 | Low differential pressure switch,range:3.0-11.75" w.c, SPDT | Dwyer | |
| 9. |  | 1910-5 | Low differential pressure switch,range:1.40-5.5" w.c, SPDT | Dwyer | |
| 10. |  | 1950-5-2F | Low differential pressure switch,range:1.4-5.5" w.c,explosion proof Cl I, Div 1 Grp C&D,Cl II Grp E,F&G | Dwyer | |
| 11. |  | IFMR0066 | DIN rail speed switch | Red Lion Controls | |
| 12. |  | PRS10101 | Plug-in Speed switch | Red Lion Controls | |
