The tank's about to overflow and you're three suburbs away. Or the rain gauge in the yard has been 'we'll fix it Saturday' for two weeks. This kit solves both. Two contacts touch liquid, LED lights up — immediate, no app required. Need to drive a siren or a warning light? Slot in the Jaycar KG-9142 Relay Card and you've got a full alarm circuit. Solder the Kwik Kit PCB, wire your contacts, done. Add to cart
| 0 | Overflow alarm |
| 1 | Rain detector |
| brand | Jaycar |
| sku | KG9138 |
| category | Electronics & Components |
| subcategory | Tools & Soldering |
| indicator_type | LED (illuminates when contacts shorted by liquid) |
| relay_compatibility | Jaycar KG-9142 Relay Card (sold separately) |
| kit_includes | Kwik Kit PCB and all electronic components |
| control_method | Hardware logic (no microcontroller required) |
