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Introduction

principle

The radio frequency admittance level switch is composed of a sensor unit and an electronic unit. The sensor unit mainly includes three parts: the measuring probe, the shielding electrode and the ground terminal. The height of the material is reflected as the change of the admittance between the probe and the container wall. When the material reaches the switch operating point, the electronic unit responds and drives the relay to act. Output switch signal. The shielding pole can prevent the malfunction signal due to the material hanging on the electrode, and the switch control signal is output only when the material really reaches the set point.

application

It is widely used in the alarm and control of liquid, slurry, dust, material level and two liquid interface levels.

Features

The radio frequency admittance level switch adopts advanced radio frequency admittance technology, which overcomes the defect that the capacitive level switch cannot eliminate the influence of conductive hanging material. The instrument operates reliably, and various technical indicators have reached the international level of similar products. In addition, the product has added on-site working status indication, which is a very stable and reliable level switch with high performance and price ratio.

technical parameter

power supply:220VAC,50/60Hz
24VDC,100mA
Sensitivity:0.5pF or less
Operating temperature:–20...180℃
Ambient temperature:–40...70℃
Working pressure:-0.1...1.38MPa
output:Relay SPDT, rated 115VAC, 10A; 220VAC, 5A
Response time:Standard: 0.2 seconds
Delay:Adjustable in 0...30 seconds
Electrical Interface:M20×1.5
Protection class:IP65
Process connection:Standard: 3/4"NPT thread or flange type above DN25
cable length:The maximum distance from the remote sensor to the electronic unit is 45.7 meters.
If the user does not specify, the factory is 10 meters
Wetted material:316SS and PTFE
Junction box material:Die-cast aluminum
Cable glands:Brass Nickel Plated & 304 Stainless Steel
Material temperature:-184...380°C(Max800°C)
Circuit temperature resistance-40...80°C

Selection table

RTF-RF Admittance Level Switch

Power supply

Power supply mode: DC24V

Power supply mode: AC220V

Sensitivity

Standard sensitivity (for conductive media)

High sensitivity (for insulating medium, ε>1.5)

Prolonged

No delay (standard circuit unit)

With delay (adjustable from 0.2 to 90 seconds)

Instrument form

All-in-one

Split

Process connection

Threaded connection NPT3/4"

Flange connection DN25

Electrode form

Standard type (temperature <121℃)

reload type

Medium temperature type (temperature <180℃)

Corrosion resistant

electrode length

For example, 150mm probe length, selection expression 150)
The above selection table does not contain selection codes. For selection, please contact the sales staff or email to sales@kewill-auto.cn to obtain a complete sample.
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