NOS Nitrous Oxide Micro Switch

NOS Nitrous Oxide Micro Switches: Precise Activation from the Pioneers of Nitrous

When it comes to triggering a nitrous system at exactly the right moment, the activation switch is one of the most critical links in the entire setup. NOS (Nitrous Oxide Systems) — the brand that helped define modern nitrous performance since the late 1970s — brings that same engineering commitment to its line of Nitrous Oxide Micro Switches. These small but essential components are built to the same exacting standards as the rest of the NOS catalog, ensuring your system fires reliably and safely every time.

What a Nitrous Oxide Micro Switch Does

A micro switch is a compact, spring-loaded electrical switch that is typically mounted at the throttle body or carburetor linkage. Its job is to detect wide open throttle (WOT) and send an electrical signal that activates the nitrous solenoids, fuel pump, or both simultaneously. Without a properly functioning micro switch, a nitrous system can activate at the wrong time — a scenario that can be costly or even dangerous to an engine.

NOS micro switches serve a dual purpose: they can function as the primary activation method for a nitrous system, or they can be wired in as a safety interlock — preventing the nitrous from ever engaging unless the throttle is truly at wide open position. This makes them an indispensable safeguard for both street-driven performance cars and dedicated race vehicles alike.

NOS Micro Switch Products: Built for Performance, Designed for Reliability

The flagship NOS micro switch offering is the NOS 15640NOS Microswitch & Bracket, a universal-fit unit that ships complete with a mounting bracket for straightforward installation. The included bracket eliminates the need to fabricate custom mounts, making the installation process clean and professional. The switch itself is engineered to activate solenoids and fuel pumps dependably, cycle after cycle.

NOS has also offered a waterproof micro switch variant (15641NOS) for applications where moisture exposure is a concern — ideal for vehicles used in wet climates or where engine bay water intrusion is possible. This variant provides the same WOT activation and safety-interlock capability while adding a layer of protection against the elements. For builders who need a dedicated mounting solution, NOS also offers a Micro Switch Bracket Kit (16520NOS), constructed from laser-engraved, black anodized aluminum for a durable, precise fit.

Why Trust NOS for Your Nitrous Activation Components?

NOS is not just a parts supplier — it is the brand that, as a now-Holley-owned company, helped legitimize nitrous oxide as a safe and repeatable power-adder for automotive use. Every significant milestone in nitrous racing history — including the first 6-second and 200 mph quarter-mile passes — was achieved with NOS equipment. That heritage of precision and reliability carries directly into their switch lineup. A micro switch may seem like a minor accessory, but sourcing it from the same manufacturer who engineered your nitrous kit ensures compatibility and consistent performance.

Whether you are building a track-only beast or a street/strip combination, NOS micro switches give you confidence that your system will activate precisely when — and only when — you want it to. Browse the full selection of Nitrous Oxide Micro Switches or explore the complete NOS brand catalog to find everything you need to build a reliable, high-performance nitrous system from the ground up.