1 overview

The ZY-SPDN-KG series RF admittance level switch adopts advanced RF admittance technology to overcome the defect of capacitive level switches that cannot eliminate the influence of conductive hanging materials. The instrument operates reliably, with all technical indicators reaching the international level of similar products. It is widely applicable for alarm and control of liquids, slurries, dust, material levels, and the interface between two liquids. In addition, the product has added on-site working status indication, which is a cost-effective and relatively stable and reliable level switch.

2 Working principle

The level switch consists of a sensor unit and an electronic unit. The sensor unit mainly includes three parts: measuring probe, shielding electrode, and grounding terminal. The height of the material is reflected by the change in admittance between the probe and the container wall. When the material reaches the switch working point, the electronic unit reacts, drives the relay to act, and outputs the switch signal. Shielding electrodes can prevent misoperation signals caused by hanging materials on the electrodes, and only output switch control signals when the materials reach the set point.

3 External dimensions

Power supply: 220VAC, 50/60Hz/24VDC, 100mA

4 Technical parameters

Sensitivity: 0.3pF or less

Working temperature: -20~180 ℃

Environmental temperature: -40~80 ℃

Work pressure: -0.1~2.5MPa

Output: DPDT relay (double pole double throw)

Contact capacity: 220VAC, 5A non inductive, 3A inductive

Response time: Standard: 0.2 seconds

With delay: adjustable from 0.2 to 90 seconds

Electrical interface: M20 × 1.5

Explosion proof grade: Explosion proof type: d Ⅱ BT4~T6, intrinsic safety type: ia Ⅱ CT4~T6

Protection level: IP65

Process connection: Standard: 3/4 "NPT thread/1" NPT thread

HG20592-20635-97 DN25 or above, please indicate other flange standards (such as GB, JB/T, HGJ, ANSI, DIN, etc.) when placing an order

Cable length: The distance from the split sensor to the electronic unit is 45 meters. If not specified by the user, it is 3 meters from the factory

Wetting material: 304/316SS and PTFE

Material of junction box: aluminum alloy

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