Explosion Proof Radar Level Gauge with 70m Range and PTFE Corrosion Resistance

Hazardous areas demand instruments that are certified safe, and tall vessels demand instruments that can reach the bottom. This explosion proof radar level gauge combines Exia/Exib certification with a 70-meter range, ±3mm accuracy and a PTFE antenna, covering liquids and solids in power, metallurgy, petroleum and chemical plants.

Why Do You Need an Explosion Proof Radar Level Gauge?

In plants handling flammable liquids, gases and dusts, every electrical instrument inside the hazardous zone must be certified to prevent ignition. Using uncertified level gauges risks not only regulatory non-compliance but catastrophic incidents. At the same time, many hazardous processes run in tall silos and tanks where the level instrument must measure reliably over long distances through dust and vapor. A certified explosion proof radar gauge solves both requirements in one device: the Exia/Exib rated electronics are safe for Zone 0 and Zone 1 areas, while the radar principle measures without contact over a 70-meter range, unaffected by dust, vapor, temperature and pressure changes. This gives plant operators compliant, dependable level data for inventory, safety interlocks and process control.

Working Principle: High-Frequency Pulse Radar with Certified Electronics

The gauge transmits high-frequency microwave pulses, available at 6GHz and 26GHz, from a PTFE-protected antenna toward the product surface. The pulses reflect at the surface and return to the antenna; the electronics measure the round-trip time, which is directly proportional to the distance, and convert it to a level value with ±3mm accuracy. The 26GHz option provides a narrow beam and strong reflection from solids and low-dielectric media, while the PTFE antenna resists corrosion from aggressive vapors. All electronics are housed in an explosion proof enclosure certified Exia CT6 Ga and Exib CT6 Gb, with 4-20 mA, HART, RS485 and Modbus outputs for integration into plant safety and control systems.

Structural Advantages of the Explosion Proof Radar Gauge

• Exia CT6 Ga / Exib CT6 Gb certification: safe for Zone 0 and Zone 1.
• 70-meter measuring range: reaches tall silos and tanks.
• PTFE antenna: corrosion-resistant in aggressive atmospheres.
• ±3mm accuracy: dependable values for inventory and control.
• 6GHz and 26GHz options: match frequency to application.
• IP67 protection: dust-tight and water-resistant.
• Thread or flange connection: flexible installation.
• 4-20mA/HART/RS485/Modbus outputs: universal integration.

Pain Point Analysis: 2 Challenging Working Conditions

Application Cases

Product Advantages

• Exia CT6 Ga / Exib CT6 Gb explosion-proof certification
• 70-meter maximum measuring range
• PTFE antenna for corrosive atmospheres
• ±3mm measurement accuracy
• 6GHz and 26GHz frequency options
• IP67 dust-tight and water-resistant housing
• Thread and flange process connections
• 4-20mA, HART, RS485 and Modbus outputs

Technical Parameters

SEO FAQ

Q1: What do Exia CT6 Ga and Exib CT6 Gb mean?

These are explosion protection ratings defined by international standards. Exia denotes intrinsic safety, where the instrument's electrical energy is limited to levels incapable of igniting the surrounding atmosphere; CT6 specifies gas group C and temperature class T6, meaning it is safe for the listed flammable gases and surfaces up to 85°C. Ga is the equipment protection level for Zone 0, where explosive atmospheres are continuously present. Exib also denotes intrinsic safety with protection level Gb, suitable for Zone 1, where explosive atmospheres occur occasionally. Together these ratings allow the gauge to be installed in the most demanding hazardous areas of chemical, petroleum and gas plants.

Q2: Why is the PTFE antenna important?

The PTFE antenna protects the radar's radiating element from corrosive vapors and media. In chemical and petroleum service, the atmosphere above the product often contains aggressive acids, alkalis or solvents that attack metal antennas, degrading the signal and eventually destroying the instrument. PTFE (polytetrafluoroethylene) is chemically inert and resists attack across an extremely wide range of media, so the antenna maintains its performance and the gauge keeps measuring accurately. This makes the PTFE version the right choice for chemical tanks, solvent storage and any application where corrosive vapors are present, avoiding premature failure and replacement costs.

Q3: Can this gauge measure both liquids and solids?

Yes. The radar principle measures any surface that reflects microwaves, covering liquids, sticky media, granules and powders. The 6GHz option, with its longer wavelength, is well suited to solids with coarse or angled surfaces, while the 26GHz option provides a narrower beam and better reflection from low-dielectric materials and fine powders. This is why the gauge is used across electric power, metallurgy, petroleum, chemical, food, pharmaceutical, water and civil industries, from liquid storage tanks to cement and mineral powder silos. When ordering, specify the medium and its characteristics so we can configure the correct frequency, antenna and signal processing.

Q4: What is the maximum range and accuracy?

The gauge measures up to 70 meters with ±3mm accuracy, which covers the vast majority of industrial tanks and silos, including very tall cement and mineral silos. The ±3mm accuracy is maintained across the measuring range through high-frequency signal processing and echo evaluation. The minimum range is short enough to measure relatively shallow vessels as well. The medium temperature range of -40 to +150°C and process pressure range of 0.1 to 4.0MPa allow installation in high-temperature, high-pressure service. For applications beyond these limits, please consult our engineers for suitable alternatives.

Q5: What support and customization do you offer?

As the manufacturer, we provide direct engineering support including hazardous area certification guidance, frequency and antenna selection, and installation advice. Customization options include measuring range, process connection (thread or flange), frequency (6GHz or 26GHz), output protocol, power supply configuration, labeling and packaging, plus OEM and ODM programs. Every unit is factory-calibrated and tested before shipment, and our engineers help confirm the certified configuration matches your area classification. Contact us with your vessel details, media and hazardous area requirements for a tailored solution and quotation.

Why Choose Our Explosion Proof Radar Level Gauge?

Safety and reach define this gauge: Exia CT6 Ga and Exib CT6 Gb certification for hazardous areas, a 70-meter range for tall vessels, ±3mm accuracy, and a PTFE antenna that survives corrosive atmospheres. It measures liquids and solids without contact, ignores dust and vapor, and integrates through 4-20mA, HART, RS485 or Modbus. As the manufacturer, you receive a certified, factory-configured instrument with direct engineering support. When the area is hazardous and the vessel is tall, choose the explosion proof radar gauge that does both.