Wireless 26GHz Phase Difference Radar Level Gauge for Remote Tank Monitoring

The hardest part of tank monitoring is often not the measurement but the connectivity: tanks sit in remote areas, on scattered sites, or across wide tank farms where cabling is impractical. The QWRD80G604 wireless radar level gauge solves both problems, combining 1mm-resolution phase difference radar with 4G, NB-IoT and 433MHz wireless transmission.

Why Do You Need a Wireless Radar Level Gauge?

Remote tanks and distributed sites create a connectivity dilemma: installing signal cables across kilometers is expensive, vulnerable to lightning and damage, and sometimes impossible across roads, waterways or leased land. Yet operators still need continuous level data for inventory, safety and regulatory reporting. A wireless radar level gauge answers this by measuring the level with radar precision at the tank and transmitting the data over the mobile network or local wireless links, with no cable between the tank and the control room. For water towers, fuel depots, chemical storage and environmental monitoring points, this means real-time level visibility at a fraction of the cost of wired infrastructure, plus the ability to retrofit monitoring onto tanks that were never wired.

Working Principle: Phase Difference Radar with Wireless Telemetry

The QWRD80G604 uses the phase difference radar principle, a form of FMCW technology that measures the phase difference between the transmitted and reflected microwave signals to determine the distance to the product surface with a resolution of 1mm. The 26GHz signal provides a focused beam and reliable echoes from liquid surfaces. The measured level is then transmitted wirelessly through the selected channel: 4G for wide-area cellular connectivity, NB-IoT for low-power narrowband IoT networks, or 433MHz for local license-free radio links. The gauge is powered by 24 V DC or 85-265 V AC, housed in a durable aluminum enclosure, and rated for pressures from -1 to 40 bar with top or side mounting options.

Structural Advantages of the QWRD80G604

• Wireless transmission: 4G, NB-IoT and 433MHz options eliminate cable costs.
• 1mm resolution: precise level data for inventory and control.
• Phase difference radar: stable, reliable FMCW measurement.
• 26GHz frequency: focused beam, dependable liquid echoes.
• Aluminum housing: lightweight and corrosion-resistant.
• Pressure rating -1 to 40 bar: covers vacuum and pressurized tanks.
• Dual power options: 24 V DC or 85-265 V AC.
• Top or side mounting: installation flexibility for any tank.

Pain Point Analysis: 2 Challenging Working Conditions

Application Cases

Product Advantages

• Wireless 4G, NB-IoT and 433MHz connectivity
• 1mm measurement resolution
• Phase difference FMCW radar technology
• 26GHz focused beam signal
• Aluminum corrosion-resistant housing
• Pressure rating from -1 to 40 bar
• 24 V DC or 85-265 V AC power options
• Top and side mounting flexibility

Technical Parameters

SEO FAQ

Q1: What is phase difference radar and how is it different from pulse radar?

Phase difference radar is a form of FMCW (frequency-modulated continuous wave) technology. Instead of sending short pulses and timing their return like pulse radar, it transmits a continuous signal whose frequency changes over time, and measures the phase difference between the transmitted and reflected signals. This phase difference is directly proportional to the distance to the product surface, allowing the level to be calculated with very high resolution, down to 1mm in the QWRD80G604. Phase difference processing also provides better signal evaluation in difficult conditions such as turbulence, foam and weak reflections, making it a preferred technology for demanding level applications.

Q2: Which wireless option should I choose: 4G, NB-IoT or 433MHz?

The choice depends on your site and network situation. 4G cellular transmission is best where mobile coverage is available and you need reliable, wide-area data delivery to a cloud platform or central server; it suits water towers, fuel depots and distributed industrial sites. NB-IoT is a low-power narrowband cellular technology ideal for battery-friendly, frequent small-data reporting in areas with NB-IoT coverage. 433MHz is a license-free local radio link suitable for short-range communication within a site, such as from tanks to a local gateway on the same premises. Our engineers can help you select the right option based on coverage, range and data requirements.

Q3: What is the measurement resolution and why does it matter?

The QWRD80G604 achieves a resolution of 1mm, meaning it can distinguish level changes as small as one millimeter. High resolution matters because it directly affects how precisely the control system can track level changes and how accurately inventory can be calculated. In a large fuel or water tank, a few millimeters of level represent a significant volume, so millimeter resolution translates into real inventory accuracy. High resolution also improves the detection of small changes such as slow leaks, which appear as gradual level variations that a low-resolution instrument would not reveal. For inventory-critical and leak-detection applications, 1mm resolution provides the sensitivity needed.

Q4: Can the gauge be installed on pressurized or vacuum tanks?

Yes. The QWRD80G604 is rated for pressures from -1 bar (vacuum) to 40 bar, covering most pressurized storage and process vessels as well as tanks operated under slight vacuum. The gauge's process connection and sealing are designed for these pressure conditions, and the top or side mounting options allow installation on vessels with different nozzle configurations. When ordering, specify your tank's operating pressure and connection type so the correct configuration and sealing are supplied. For pressures beyond 40 bar, please consult our engineers to discuss suitable alternatives from our product range.

Q5: What support and customization do you offer?

As the manufacturer, we provide direct technical support including wireless network planning, antenna placement advice, mounting selection and troubleshooting. Customization options include measurement range, wireless module (4G, NB-IoT or 433MHz), power supply configuration, process connection, data reporting format, labeling and packaging, plus OEM and ODM programs for IoT platform providers and system integrators. With a monthly supply capacity of 100 pieces and delivery within 5-8 working days, we support both small pilot deployments and large-scale rollouts. Contact us with your site details and monitoring requirements for a tailored solution.

Why Choose Our Wireless Radar Level Gauge?

The QWRD80G604 removes the two biggest barriers to tank monitoring: cabling cost and site connectivity. Its 1mm-resolution phase difference radar, 26GHz reliability and 4G/NB-IoT/433MHz wireless options deliver precise level data from any tank, anywhere, without a meter of signal cable. The aluminum housing, -1 to 40 bar pressure rating and flexible mounting make it a rugged, versatile choice. As the manufacturer, you receive configuration matched to your network and vessel, plus direct engineering support. When your tanks are remote and your data must be live, choose the wireless radar gauge that connects them.