k24 Oil Pressure switch

Honda k24a3 appears to have only a oil pressure switch not a sensor it is 1 wire. how do I wire this to a link ECU?

looks like the switch grounds to the block when there is no oil pressure.

I would like to use it to trigger some safety features in the tune and I will use an aux output to the oil light in the dash.

otherwise i will fit a pressure sensor but I am having trouble finding one that's 1/8bspt. would rather not use an adapter fitting.

Wiring your pressure switch should be as easy as using a digital input, if you will open the base map for the Honda Integra Type R (PCLink G4X), you will see how they have configured the VTPSW (Vtec Pressure Switch) as a GP Input.

Have you considered an adapter to a hose, and remote-mount the pressure sensor? They live a lot longer that way anyway (at least they do on our race cars).

I often use this hose:

https://www.anplumbing.com/npt-male-to-npt-female-speed-flex-gauge-sensor-extension-ptfe-hose-assembly.html

and I would use this adapter.

https://www.anplumbing.com/straight-npt-female-to-bsp-male-stainless.html