Views: 50 Author: Site Editor Publish Time: 2025-06-20 Origin: Site
How to choose a suitable Level Transmitter?
Choosing the right level transmitter depends on several factors, including the type of liquid, tank design, environmental conditions, and measurement requirements.
Here's a step-by-step guide to help you select the best one:
1. Determine the Measurement Type
- Continuous Level (e.g., ultrasonic, radar, capacitive, hydrostatic)
- Point Level (e.g., float switches, conductivity probes, vibrating forks)
2. Consider the measured media's properties
- Conductive or Non-Conductive? (Capacitive sensors work for non-conductive liquids.)
- Viscosity & Density (Affects float-based or pressure sensors.)
- Corrosiveness (Requires materials like stainless steel, PTFE, or Hastelloy.)
- Foaming or Turbulence (Ultrasonic may struggle; radar is better.)
3. Select Technology
| Level Transmitter Type | Best For | Limitations |
| Ultrasonic Level Transmitter | Non-contact, clean liquids | Affected by foam/vapor |
| Radar (Non-contact) Level Transmitter | High-accuracy, harsh conditions | Expensive |
| Hydrostatic (Submersible) Level Transmitter | Tanks, open water, wastewater | Needs calibration for density changes |
| Capacitive Level Transmitter | Non-metallic tanks, corrosive liquids | Sensitive to coating buildup |
| Float & Displacer Level Transmitter | Simple, low-cost applications | Mechanical wear over time |
| Magnetostrictive Level Transmitter | High-accuracy, fuel/oil storage | Higher cost |
| Guided Wave Radar Level Transmitter | Interface level (oil/water) | Not ideal for sticky liquids |
4. Tank & Environment Factors
- Tank Material (Non-metallic tanks may need capacitive or ultrasonic.)
- Pressure & Temperature (High-pressure tanks require specialized transmitters.)
- Vapor, Dust, or Foam (Radar works better than ultrasonic here.)
5. Output & Communication Needs
- Analog (4-20mA, 0-10V) – Standard for industrial use.
- Digital (HART, Modbus, Foundation Fieldbus, Profibus) – For smart systems.
- Wireless (LoRa, Wireless HART) – Remote monitoring applications.
6. Installation & Maintenance
- Top-mounted (Ultrasonic, Radar)
- Side-mounted (Float, Capacitive)
- Submersible (Hydrostatic)
- Ease of Calibration (Some require frequent recalibration.)
7. Budget & Brand Reliability
- Low-cost: Float switches, hydrostatic.
- High-accuracy: Radar, Magnetostrictive.
8. Quick Selection Guide
- Water/Wastewater: Hydrostatic or Ultrasonic
- Oil/Fuel Storage: Magnetostrictive or Guided Wave Radar
- Corrosive Chemicals: Capacitive or Radar with PTFE lining
- High-Temperature Liquids: Radar or RF Admittance
- Foaming Liquids: Guided Wave Radar
ZYZL INSTRUMENTS offer total level measurement solutions, products include Guided Wave Radar Level Transmitter, Contacting Radar Level Transmitter, Radar Level Meter, Ultrasonic Level Meter, Vibrating Level Switch, Vibrating Fork Level Detectors by customer' s various applications:
Applications include petrochemicals, chemicals, water treatment, pharmaceuticals, food processing industry, environmental protection industries, paper industry, air conditioning, power systems, pipping engineering, hydraulic machinery, also widely applied in the field of agriculture.
ZYZL INSTRUMENTS research and develop high quality industrial sensors and instruments products by 30+ years' manufacturing experience, product applied EMC Test, Vibration Test, Impact-resistance Test, High-Low Temperature Impact test etc. level measurement products certificated to CE, RoHs, ISO9001, New High-Tech Enterprise, Import & Export Certificate etc.
