| Onlinecomponents.com | HIH-4021-001 | 20.49 | 1 | 46 | | HONEYWELL | | 20.49 @ 1 |
| Mouser | 785-HIH-4021-001 | 24.63 | 1 | 94 | | Honeywell | | 24.63 @ 1 |
| Hotenda | H3928109 | 26.73 | 1 | In Stock | | Honeywell Sensing and Control | | 26.73 @ 1 |
  | Radwell | HIH-4021-001 | 34.0 | 1 | In Stock | | HONEYWELL MICROSWITCH | | 34.0 @ 1 |
| AmazonTP | B00KSM1GT4 | 38.97 | 1 | In Stock | 3 | Honeywell Sensing and Control | | 38.97 @ 1 |
| AmazonUNK | B00KSM1GT4 | 38.97 | 1 | In Stock | | Honeywell Sensing and Control | | 38.97 @ 1 |
| Waldom | HONEYWELL HIH-4021-001 | 48.61 | 2 | In Stock | | HONEYWELL | | 48.61 @ 2 |
  | Newark | 69AH8079 | 64.79 | 1 | In Stock | | HONEYWELL | | 64.79 @ 1 |
| us.rs-online.com | 70119441 | 80.27 | 50 | In Stock | | Honeywell | | 80.27 @ 50 |
  | kempstoncontrols.co.uk | HIH-4021-001 | 4032.51615 | 1 | In Stock | | Honeywell | | 4032.51615 @ 1 |