Radar level transmitter

The primary difference lies in the beam angle and precision. 80GHz radar offers a much narrower beam (typically 3° to 6°), which minimizes interference from internal tank structures like agitators or ladders. It provides millimeter-level accuracy (±1mm to ±2mm) and is ideal for small vessels or solids. 26GHz radar has a wider beam and is generally more cost-effective for large-scale liquid storage tanks where internal obstructions are minimal.

Antenna selection depends on the chemical properties and state of the medium. For corrosive liquids, choose a PTFE-sealed horn or rod antenna to prevent chemical attack. For high-temperature or high-pressure environments, a stainless steel horn antenna with a ceramic seal is required. If measuring solids or powders, a parabolic antenna or a horn with a dust cover is recommended to prevent signal attenuation caused by dust accumulation.

For hazardous environments, ensure the device has ATEX or IECEx explosion-proof certification. For pressure vessel integration, compliance with the Pressure Equipment Directive (PED) is vital. Additionally, look for SIL 2/3 (Safety Integrity Level) ratings if the transmitter is part of a safety instrumented system to prevent tank overfill. Ingress Protection (IP67 or IP68) is a must for outdoor or wash-down environments.

The Dielectric Constant of the medium determines the strength of the reflected signal. Media with a low Dk (e.g., oils, hydrocarbons) reflect less energy, requiring high-sensitivity sensors or Guided Wave Radar (GWR). For media with a high Dk (e.g., water-based liquids), standard Non-Contact Radar is highly effective. Always provide the supplier with the specific Dk value to ensure the transmitter's signal-to-noise ratio is sufficient.

Request a Factory Acceptance Test (FAT) report and a Calibration Certificate for every unit before shipment. Use third-party inspection services to verify the protective packaging, as radar lenses are fragile. Ensure the supplier uses anti-static and shock-absorbent materials to prevent electronic failure during long-haul transit.

Focus on long-term technical support rather than just the initial unit price. Negotiate for extended warranties (24 months instead of 12) and request free spare parts (like gaskets or display modules). For bulk orders, ask for tiered pricing where the discount increases by 10-15% once the volume exceeds 50 units.

Ensure the supplier provides the correct HS Code (typically 9026.10) to avoid customs delays. For urgent projects, use Air Freight (DAP/DDP terms) to minimize port congestion risks. Verify that the Country of Origin (COO) certificates are included to benefit from potential trade agreements or to comply with local import regulations.

Utilize secured payment systems provided by Made-in-China.com to ensure funds are only released upon proof of shipment. For large-scale projects, consider a Letter of Credit (L/C) or a 30/70 payment structure (30% deposit, 70% after passing pre-shipment inspection) to maintain leverage over product quality.