GRI GRI 2624 Water Sensor, Relay Contact, Normally Closed for a Closed Loop Circuit, 24 VDC MSRP: Was: Now: $21.42
GRI GRI 8080RS-T-W Recessed 3/4" Stubby Steel Door Switch Set, White, Screw Terminals MSRP: Was: Now: $6.60
GRI GRI PB-2020-T-W 3/8" Plunger Switch, Closed Loop, Press to Fit, White, Terminals MSRP: Was: Now: $5.79