We offer a variety of restriction measuring devices that help you get maximum filter utilization. All measure restriction in inches of water vacuum. All are resistant to vibration, breakage, weather, corrosion, dust and dirt to assure reliable filter restriction readings.
- Provide precise readings that show how much life is left in an air filter
- Measures restriction in inches of water vacuum
- Resistant to vibration, breakage, weather, corrosion, dust and dirt to assure reliable filter restriction readings
Replacing filters based on restriction readings can reduce your maintenance costs significantly. Visual inspection of air filters is not adequate and should not dictate service life. Filters that appear very dirty may still contain a great amount of service life.
Over-servicing and excessive handling of the filter can result in serious consequences: filter damage, improper installation, intake contamination from ambient dust, and/or increased service cost, time and material. In contrast, filter service based on restriction readings can enable you to obtain the longest life possible from the filter, and the best engine protection.
Restriction Readings — Where & When
Restriction readings are normally taken at the air cleaner on the clean side of the air filter. If the air cleaner does not have a restriction tap, readings can be taken anywhere in the system between the air cleaner and the engine. To measure restriction of a naturally aspirated diesel engine, the reading is taken at full-governed RPM with no load.
Typical mounting options:
- On the air cleaner outlet tube
- On the intake duct
Continuous Reading devices that show how much life is left in the filter:
- The Informer™
- Service Gauge for Instrument Panel
Go/No-Go restriction readings on heavy-duty vehicles:
- Servi-Signal Mini™
- Visual Restriction Indicator
- Electrical Indicator
- SafetySignal™ for safety filters
In-Field restriction readings on light- and medium-duty vehicles:
- In-Field Service Gauge Kit
- Water manometer
We also provide various sized fittings to ensure a correct fit on service indicators.