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Author: Site Editor Publish Time: 2025-05-12 Origin: Site
The performance of radar level transmitters depends on how well their technical specifications align with your application. This article decodes critical parameters and offers selection guidelines.
1. Frequency
26GHz vs. 80GHz
26GHz: General-purpose, ideal for most liquids (water, oils), robust against interference (up to 50m range).
80GHz: High-frequency narrow beam, ±1mm accuracy, suits foam/vapor-prone or confined spaces.
Tip: Opt for 80GHz in complex tanks (reactors, agitated vessels); 26GHz for standard storage tanks.
2. Dielectric Constant (ε)
Reflectivity depends on ε:
ε≥1.4 (water, acids): Strong reflection, compatible with all radar types.
ε<1.4 (LPG, light oils): Requires high-frequency radar or guided-wave technology.
Tip: Always specify ε for low-dielectric media to avoid signal loss.
3. Measuring Range & Blind Zone
Range: Select 10% beyond max tank height (e.g., 25m for a 20m tank).
Blind Zone: Unmeasurable area (0.3~1m near antenna); ensure liquid stays above this zone.
Tip: For tall tanks, choose extended-range models and verify installation height.
4. Process Temperature & Pressure
Temperature: Standard models: -40℃~200℃; high-temp versions up to 400℃ (e.g., molten metal).
Pressure: Standard 4MPa; custom high-pressure designs up to 10MPa (e.g., LNG tanks).
Tip: Confirm extreme conditions with suppliers for customized solutions.
5. Protection Rating & Certifications
IP68: Fully waterproof for outdoor/humid environments.
Explosion-proof: ATEX/IECEx for hazardous areas (oil & gas).
Hygienic: EHEDG/3A for food/pharmaceutical industries.
Tip: Mandatory explosion-proof certification in hazardous zones; hygienic designs for food safety.
