A dual-beam radar level gauge is an instrument that measures liquid level by utilizing the reflection characteristics of radar waves.
The dual-beam radar level gauge operates based on the time-of-flight principle. It emits extremely short microwave pulses with very low energy. These pulses are transmitted through the antenna system and travel along the cable or rod probe. When the pulse encounters the material surface, it is reflected back and received by the receiver within the instrument. The electronic components calculate the distance between the material surface and the probe based on the pulse travel time, and then determine the liquid level height.
| Parameter | Specification |
|---|---|
| Measurement range | Three options available: 1-17ft (0.3-5m), 1-50ft (0.3-15m), and 1-100ft (0.3-30m) |
| Operating frequency | 6.3GHz and 26GHz |
| Output signal | On-site configurable 4-20mA/20-4mA output |
| Resolution | 6.1μA |
| Communication | Supports RS-232, RS-485 or HART communication |
| Operating temperature | Enclosure: -40°F to 140°F (-40°C to 60°C) Standard process/probe: -40°F to 176°F (-40°C to 80°C) |
| Protection grade | NEMA 6/IP68 |
Dual-beam radar level gauges are widely used in industries such as oil and gas, chemical, food and beverage, pharmaceutical, water and wastewater treatment, and can be used to measure the liquid level in storage tanks, reactors, containers and pipelines.