24VDC In line GWR Level Transmitter 4-20mA 6m Measuring range

NYRD704 1.8GHz Guided Wave Radar Level Meter 

The guided wave radar level meter is a level meter based on the principle of time domain reflection (TDR). The electromagnetic pulse of the radar level gauge propagates along the steel cable or probe at the speed of light. Part of the pulse of the level meter is reflected to form an echo and return to the pulse transmitter along the same path. The distance between the transmitter and the surface of the measured medium is proportional to the propagation time of the pulse during that period, and the liquid level height is calculated.

Radar Level Meter Technical Parameter

※ Note: Products can be customized according to the specific requirements of users!

Radar Level Meter Installation requirements

Installation Guide

The following installation guide is suitable for that of cable and rod probes for measurement of solid particles and liquid. The coaxial tubular probe is applied only to the liquid object.

Installation position:

Try to stay away from the outlet and inlet.

The meter should not touch the tank internal wall for metal tanks and plastic tanks. If it is a metal tank, the material level meter should not be installed at the center of the tank.

It is proposed to install at 1/4 of the silo diameter.

Probes of cable or rod types should keep a distance away from the tank wall not less than 30cm.

The probe bottom should be about 30mm to the tank bottom.

The probe should keep a distance not less than 200mm from the obstacles within the tank.

The sensor can be installed at the center of the tank top, if the bottom of the container is a cone, so the measurement can be taken to the tank bottom.

The picture on the right shows the rod-type radar installation diagram, mainly used for liquid level measurement.

Characteristics:

Can measure a material of which the dielectric constant is greater than or equal to 1.4.

Generally used for measuring the material of which the viscosity is less than or equal to 500cst and less likely to produce adhesion.

The maximum range of rod-type radar can reach 6m.

Have strong inhibiting ability to the steam and foam so the measurement is not affected.

The double-rod measurement method can be taken for the liquid material of which the dielectric constant is relatively small in order to guarantee the good measurement accuracy.

The down-pulling force applied to the cable

When charging and discharging, the material will generate down-pulling force to the cable, which is determined by the following factors:

• cable length
• material density
• tank diameter
• cable diameter

Installation guide for liquid measurement

The installation guide below applies to rod- and cable-type probes. The tubular probe measurement is not related with the installation method.

Obstacles within tank

• Probe should keep a distance not less than 200mm away from the obstacles.

Interference removal

• Interference suppression: The software could suppress the interference echo, so as to achieve the ideal effect of measurement.
• Bypass, wave guide pipes or tubes could be used to suppress the interference when the viscosity is not greater than 500cst.

Liquid standard installation

Tubular probe is the best solution for the medium of which the viscosity is less than or equal to 500cst and which is not easy to adhesion. The features are as follows:

• Excellent reliability
• Can be used in a medium of which the dielectric constant is greater than or equal to 1.4, and the measurement is irrelevant to the medium conductivity.
• Obstacles within tank and the short pipe size do not affect the measurement.
• Withstand more lateral pressure than rod-type probe
• Rod-type probe is suggested for medium of high viscosity.