Noise-Monitoring Station

Portable meter measuring ambient noise near worksites. Provides documentation to prove compliance with local environmental limits.

Noise-Reduction Fan Cowl

Acoustically lined cowl around the fan outlet reducing overall sound levels. A key modification for sweepers operating in residential streets.

Noise-Reduction Kit

After-market kit comprising acoustic foam seals and mufflers. Reduces external sound levels for night-sweeping approval.

Nominal Stone Size

Grading designation (e.g., 6mm, 10mm) for surface dressing chippings.

Non-Contact Speed Sensor

Hall-effect sensor reading wheel or shaft speed. Supplies input to controllers for rate-of-spread calculations.

Non-Return Fuel Valve

Valve preventing fuel back-flow when servicing the supply line. Maintains prime in auxiliary engines for reliable restarting.

Non-Slip Cab Mat

Textured rubber mat preventing slips when entering or exiting the cab. Easy to remove for cleaning and water drainage.