Portable FMCW Radar Level Gauge for Quick, Accurate Liquid Measurement Anywhere

Sometimes you do not need a permanently installed instrument; you need a reliable level reading here, now, at any tank in the plant or in the field. The QWRD80G611 portable FMCW radar level gauge brings laboratory-grade radar measurement to your hand, with Bluetooth, NB-IoT and 4G connectivity for instant data transfer.

Why Do You Need a Portable Radar Level Gauge?

Permanent level instruments are expensive to install on every tank, and many tanks are only checked periodically: backup storage, mobile tanks, contractor sites, environmental monitoring points and tanks under commissioning. Measuring these with a tape or a manual dip is slow, dangerous and inaccurate. A portable radar level gauge solves this: one instrument serves every tank, giving instant, non-contact level readings without climbing, without opening hatches, and without product contact. For plant operators verifying tank levels during rounds, for auditors checking inventory, and for field technicians working across multiple sites, a portable FMCW radar gauge turns a tedious manual task into a quick, precise measurement, with the reading stored and transmitted digitally.

Working Principle: FMCW Radar in a Portable Package

The QWRD80G611 uses the FMCW (frequency-modulated continuous wave) radar principle: it transmits a continuously swept microwave signal toward the liquid surface, and measures the frequency difference between the transmitted and reflected signals to calculate the distance to the surface with high resolution. Because the measurement is non-contact, it is unaffected by liquid properties such as density, viscosity, conductivity and color. The portable instrument is IP67-protected for outdoor use, operates over a process temperature range of -40 to +120 °C, and delivers the measured value through 4-20 mA, HART or Modbus outputs, with Bluetooth, NB-IoT or 4G options for wireless data transfer to phones, tablets and cloud systems.

Structural Advantages of the QWRD80G611

• Portable design: one instrument serves all tanks, no permanent installation.
• FMCW radar accuracy: precise level measurement independent of media properties.
• Non-contact measurement: no product contact, no contamination, safe operation.
• IP67 protection: rugged enough for outdoor and field use.
• -40 to +120 °C range: handles hot and cold process media.
• Multiple outputs: 4-20 mA, HART and Modbus for integration.
• Wireless connectivity: Bluetooth, NB-IoT and 4G options.
• Fast deployment: instant readings without climbing or tank entry.

Pain Point Analysis: 2 Challenging Working Conditions

Application Cases

Product Advantages

• Portable, one instrument for all tanks
• FMCW radar precision independent of media properties
• Non-contact, safe measurement without tank entry
• IP67 rugged design for field use
• Process temperature range -40 to +120 °C
• 4-20 mA, HART and Modbus outputs
• Bluetooth, NB-IoT and 4G wireless options
• Instant deployment with no installation cost

Technical Parameters

SEO FAQ

Q1: How accurate is a portable FMCW radar gauge compared with manual measurement?

A portable FMCW radar gauge is significantly more accurate and repeatable than manual measurement methods such as dip tapes or gauge sticks. Manual methods depend on the operator's technique, the tape condition, and the difficulty of reading a moving liquid surface, and they are prone to errors of centimeters or more. The FMCW radar measures the distance to the surface electronically with high resolution, giving consistent, repeatable readings regardless of the operator. Because the measurement is non-contact, it is also unaffected by liquid density, viscosity or color, so the same instrument gives reliable readings across different products and tanks.

Q2: Can the portable gauge be used in hazardous areas?

The standard portable version of the QWRD80G611 is designed for general industrial and field use. If you need to measure tanks in classified hazardous areas where flammable vapors or gases are present, the instrument must be approved for that area classification, and the standard version may not be suitable. In such cases, please inform us of your area classification and we will advise on the appropriate certified instrument from our range. Never use a non-approved instrument in a hazardous area, as this creates a serious ignition risk. For general plant and field use outside classified areas, the portable gauge provides safe, non-contact measurement without opening tank hatches.

Q3: How does the wireless data transfer work?

The QWRD80G611 offers Bluetooth, NB-IoT and 4G connectivity options. With Bluetooth, the gauge pairs with a phone or tablet app, and readings are transferred instantly to the device for display, logging and sharing. With NB-IoT or 4G, the gauge can transmit measurements directly to a cloud platform or central database over the mobile network, which is ideal for field monitoring at remote or temporary sites where no local network exists. This wireless capability turns a simple handheld measurement into digital data that can be stored, analyzed and reported automatically, supporting inventory management, compliance documentation and audit trails.

Q4: What process temperatures can the gauge measure?

The QWRD80G611 is rated for process temperatures from -40 °C to +120 °C, covering cold storage tanks, refrigerated media, ambient-temperature liquids and hot process products. The wide range is achieved through the FMCW radar technology, which measures the distance to the surface without contacting the media, and through the IP67-protected electronics that withstand the ambient conditions at the measurement point. Because the measurement is non-contact, the process temperature affects the gauge only through the atmosphere above the liquid, which is well within the rated range for typical tank and vessel applications.

Q5: What support and customization do you offer?

We manufacture the QWRD80G611 and provide direct technical support including application advice, connectivity configuration and troubleshooting. Customization options include measurement range, output configuration, wireless module selection, labeling and packaging, as well as OEM and ODM programs for equipment rental companies, service providers and instrument distributors. With a monthly supply capacity of 100 pieces and delivery within 5-8 working days, we support both individual instruments and fleet deployments. Contact us with your application and connectivity requirements for a recommendation and quotation.

Why Choose Our Portable Radar Level Gauge?

The QWRD80G611 replaces ladders, dip tapes and guesswork with one rugged, precise instrument that goes wherever the tanks are. Its FMCW radar accuracy, IP67 durability, wide temperature range and Bluetooth/NB-IoT/4G connectivity make it the professional tool for operators, auditors and field technicians. As the manufacturer, you get a factory-calibrated instrument, wireless options matched to your workflow, and direct support. When you need accurate level data at any tank, any time, choose the portable radar gauge that puts precision in your hand.