Filter Accessories & Service Indicators

Reliable monitoring and intelligent accessories for optimal filtration performance and extended service life. Our range of Sentinel service indicators, mounting brackets, rain caps, and air duct components ensures safe installation, efficient airflow, and timely maintenance across all one- and two-stage filter systems.

Smart Components for Reliable Filtration Systems

Sentinel – Electric Maintenance Switch (Sensor)

The Sentinel electric maintenance switch continuously monitors the filter’s restriction level.
When the predefined pressure differential is reached, it sends an electrical signal that activates an optical or acoustic warning.
This ensures that maintenance takes place exactly when required — preventing both premature filter changes and potential engine risks caused by excessive restriction.

Key Advantages

Lightweight yet robust design for demanding environments
Electrical contact with stabilizer to reduce resonance
Simple installation; compatible with all filter models
Automatic reset after filter servicing
Normally open contact

Properties

Available trigger points: 25, 50, 62, and 75 mbar (custom 10–120 mbar on request)
Operating voltage: 12–24 V DC
Protection: IP44 or IP67 (AMP plug)
Operating temperature: −30 °C to +120 °C

ELECTRIC SWITCH (PDF) FULL CATALOG (PDF)

Sentinel – Mechanical Maintenance Switch (Sensor)

The Sentinel mechanical maintenance switch provides a clear, optical indication of filter status.
When the set pressure differential is reached, the display changes from green to red, alerting the operator that filter servicing is required.
After servicing, the switch is reset manually.
Both the mechanical and electric versions can be installed together — one for direct filter indication, the other for cabin signal transmission — suitable for all one- and two-stage systems.

Key Advantages

Lightweight but robust construction for harsh environments
Simple installation; compatible for all filter models
Ideal for compact systems or as a secondary visual indicator

Properties

Trigger points available: 25, 50, 62, 75 mbar
Manual reset after servicing
Operating temperature: −30 °C to +120 °C

MECHANICAL SWITCH (PDF) FULL CATALOG (PDF)

Rain caps

The rain cap prevents moisture, snow, and debris from entering the air filter — protecting it against water ingress and large contaminants such as leaves or branches.
This simple yet essential accessory extends filter life and ensures reliable performance in outdoor environments.

Key Advantages

Protects against water, dust, and coarse debris
Extends filter service intervals
Functions as a rain and particle guard
Available in multiple diameters and materials (metal or plastic)
Fits directly onto filter inlets

RAIN CAP (PDF) FULL CATALOG (PDF)

Mounting Brackets for Two-Stage Filters

Proper installation ensures long filter life, vibration stability, and safe operation — our mounting systems are engineered to match each air cleaner precisely.
We provide a complete range of mounting solutions for both VikoSeal and VikoPac two-stage air filters.

Configuration Overview

VikoPac: requires two metal brackets
VikoSeal: requires one bracket

Bracket Types

Metal: high temperature resistance, ideal for heavy-duty use
Plastic: robust, lightweight, cost-efficient
Quick-release: tool-free operation for easy servicing
Welded holders: custom, project-specific solutions

MOUNTING BRACKETS PDF FULL CATALOG (PDF)

Air Duct Components and Custom Solutions

Longday offers a complete range of adapters, elbows, hoses, and pipes for both the intake side and clean-air side of the filter system.
Our standard and custom air duct components ensure a perfect fit, minimal pressure loss, and optimal use of installation space between air cleaner and engine manifold.

Beyond standard parts, we design and manufacture custom air duct assemblies and molded components tailored to specific performance and space requirements.
Each design focuses on compact layout, vibration resistance, and maximum airflow efficiency — ensuring seamless integration into your system, whether for compact cabins, containerized equipment, or heavy-duty machinery.