1. Product Overview

1.1 Introduction

The JCRD series sensors are advanced radar level measuring instruments with a maximum measurement distance of 35 meters. They can be used for level measurement of storage tanks, intermediate buffer tanks, or process containers, and output 4mA to 20mA analog signals.

1.2 Application

Adopting advanced non-contact measurement

Made with extremely stable materials

Measure the level of liquid and solid media

Can measure all media with a dielectric constant greater than 1.8

Measurement range 0... 20m (can be extended to 35 meters)

Adopting a two-wire system and loop power supply technology, the power supply voltage and output signal are transmitted through a two core cable

4mA to 20mA output or digital signal output

Resolution 1mm

Not affected by working conditions such as noise, steam, dust, vacuum, etc

Not affected by changes in medium density, viscosity, and temperature

The process pressure can reach 40 bar

The process temperature can reach 250 ℃

1.3 Measurement principle

High frequency microwave pulses are transmitted and received through an antenna system, and radar waves travel at the speed of light. The travel time can be converted into level signals through electronic components. A special time extension method can ensure stable and accurate measurements in a very short period of time.
Even in complex working conditions with false echoes, the latest microprocessing technology and debugging software can accurately identify the echoes of the material level.

1.4 Input

The antenna receives reflected microwave pulses and transmits them to the electronic circuit. The microprocessor processes this signal and identifies the echoes generated by the micro pulses on the surface of the material. The correct recognition of echo signals is completed by intelligent software, with an accuracy of up to millimeter level. The distance D from the surface of the material is proportional to the time travel T of the pulse: D=C × T/2 (where C is the speed of light). Since the distance E of the empty tank is known, the material level L is: L=E-D

1.5 Output

By inputting the empty tank height E (=zero), full tank height F (=full range), and some application parameters to set, the application parameters will automatically adapt the instrument to the measurement environment. Corresponding to 4mA to 20mA output.