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YK-RLGW. Guided Wave Radar Level Transmitter

The guided wave radar emits high-frequency microwave pulses that propagate along a probe element (steel cable or rod). When the pulses reach the measured medium, a sudden change in dielectric constant causes part of the signal energy to be reflected back. The time interval between the transmitted and reflected pulses is proportional to the distance to the medium surface.

008615821551277

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8615821551277

YK-RLGW. Guided Wave Radar Level Transmitter

description1

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Product Parameters

Parameter	Specification	Parameter	Specification
Structural Form	Cable Type, Rod Type	Connection Method	Flanged Type
Housing Material	SUS304, SUS316, Aluminum Alloy	Measuring Range	0~20m
Probe (Medium) Material	304, 316L	Ambient Temperature	-20 ~ 60℃
Process Temperature	-20 ~ 380℃	Applicable Pressure	1.0~60Bar (Negotiable)
Accuracy	±0.1%	Electrical Interface	M20×1.5 (Negotiable)
Output Mode	4~20mA, HART Protocol, RS485	Protection Grade	IP65, IP66, IP67
Certification	Intrinsically Safe, Flameproof	Power Supply Voltage	220VAC, 24VDC

Product Principle

Guided wave radar is a time-of-flight measurement instrument. Radar pulses travel at the speed of light, and the travel time is converted into a level signal by electronic components.

The probe emits high-frequency pulses that travel along the cable or rod. When the pulses reach the material surface, they are reflected and received by the instrument receiver, which converts the distance signal into a level signal. The reflected signal is transmitted back along the probe to the electronic unit, where the microprocessor processes the signal and identifies the true echo.

Accurate echo recognition is achieved by pulse processing software. The distance D to the material surface is proportional to the pulse travel time T:

D=C×T/2

Where C is the speed of light.

Since the empty tank distance E is known, the level L is calculated as:

L=E−D

By entering the empty tank height (E = zero point), full tank height (F = full scale), and application parameters, the instrument automatically adapts to the measurement environment and provides a corresponding 4–20 mA output.