Niterra Philippines, Inc. is the exclusive importer and distributor of Niterra products in the Philippines. Our products mainly cover the aftermarket components for automotive and motorcycles. Niterra is also known as the leading ignition and sensor specialist providing high-quality spark plugs, glow plugs, spark plug caps, cables, and sensors. Aside from the wide offering of automotive and motorcycle portfolio, the Company also specializes in technical ceramics including semiconductor products, fine ceramics, and cutting tools for many different industrial areas.


A true air/fuel monitor that senses exhaust oxygen, carbon monoxide, hydrogen, and hydrocarbons in the exhaust and calculates real time air fuel ratio (AFR).


The NTK Air-Fuel Ratio Monitor is a tool used to measure the air-fuel ratio (AFR) produced by carbureted and fuel-injected engines.

Its measurement ranges from 9.00 to 20.00 air-fuel ratio for unleaded fuels, equating to (0.62 to 1.37 Lambda) and is also compatible with fuels other than unleaded.

The AFRM’s display is designed to show air-fuel ratio values based on an unleaded scale with 14.7:1 AFR as the stoichiometric ratio. The monitor will display on an unleaded scale even though the fuel used may have different properties (stoichiometry for methanol is approximately 6.5:1).

The same principle applies to other fuels such as ethanol, propane, CNG, LPG etc. The display will simply read on an unleaded scale. As long as the engine runs between the range of 9.00:1 – 20.00:1 AFR (or 0.62 to 1.37 Lambda), the AFRM will work with almost any fuel type.