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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryRetail & CommerceWholesale - Machinery & Technical EquipmentGlattbruggLongday AG
Longday AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Longday AG specialises in advanced air filtration solutions for industrial and mobile applications. The company designs and manufactures engine, cabin, hydraulic, fuel and oil filters, as well as modular systems such as the DustRanger™ series, providing customised filter elements and aftermarket products for OEMs and distributors, with products meeting international standards (e.g. ISO 16890, EN 1822, ISO 5011).

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Offering

Products & services

Industry:Wholesale - Machinery & Technical Equipment
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Longday AG

✓ Offered10
Air filtration solutions
Advanced air filtration solutions for OEMs and distributors, including custom filters, air purifiers and filter elements for demanding technical applications.
Cabin filters
Custom cabin air filters and complete filtration systems for OEMs and retrofit solutions, including categories for coarse dust, particles, HEPA and combination protection.
Engine air filters
Single-stage and two-stage air filters for engines, compressors, generators and mobile machines with different dust loads and ISO-5011 testing.
Air intake pre-separators
Pre-separators for intake air that separate coarse dust, sand, dirt and moisture before the main filter, improving service life, maintenance intervals and engine protection.
Filter accessories and maintenance indicators
Maintenance switches, rain hoods, mounting brackets, air duct components and spare parts for air filtration systems, including mechanical and electrical Sentinel indicators.
Replacement filters
Replacement filter elements for hydraulic, oil, fuel, AdBlue and air systems, as well as custom packaging, labeling and second-source solutions.
HVAC and industrial filters
High-performance air filters for HVAC systems, cleanrooms and industrial applications, including prefilters, fine filters, HEPA/ULPA filters, activated carbon filters and filters for plastics processing.
DustRanger™ protective ventilation system
Modular air filtration and overpressure system with active pre-cleaning, H14-HEPA and activated carbon filtration for cabins, containers and industrial environments.
DustRanger™-Indoor
Industrial air purification for indoor spaces with multi-stage filtration, H14-HEPA, activated carbon, flexible installation and sensor-controlled control.
DustRanger™-Air Cleaner
OEM air cleaner with modular housing configuration, axial airflow and honeycomb filter technology for industrial, HVAC and energy systems.
Trust & reputation

ranQ Trust Score of Longday AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Longday AG has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
x
CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Longday AG scores 85.5 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.55.07%
Longday AG scores 83.3 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).83.322%
Longday AG scores 0.9 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.0.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Longday AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, so the score is backed by part of the criteria. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

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Location

Flughofstrasse 39a
8152 Glattbrugg

At a glance

Legal form
Corporation
UID
CHE-113.459.762
Founded
2007 · 19 years
Last commercial register change
August 9, 2023
Employees
1 to 10
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
100.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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