Xi'an Dehou Electronic Technology Co., Ltd.
Xi'an Dehou Electronic Technology Co., Ltd.
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24VDC RF Admittance Switch Anti Adhesion
Working Principle of Power Loss Protection RF Admittance Level Switch For High Temperature
The working principle of the radio frequency admittance level switch is to measure and control the level by sensing the change of reactance (capacitive reactance and impedance) between it and the tank body through the probe. The internal electronic unit is composed of the reactance between the probe measuring pole and the empty tank to form a balanced bridge circuit and generate a stable oscillation signal. When the measured medium covers the probe measuring pole, the reactance change between the probe measuring pole and the tank will cause the bridge circuit to be unbalanced and stop generating oscillating signals. The post-stage circuit detects this change and outputs an alarm signal. The oscillating signal is applied to the measuring electrode of the probe as a radio frequency signal, and is also sent to the protection electrode of the probe after passing through a 1:1 voltage follower. isolation. When there is material hanging on the probe, there is no potential difference between the measuring electrode and the protective electrode to form electrical isolation to ensure that the signal change of the protective electrode does not affect the detection, so that the change of the reactance on the probe measuring electrode can only be determined by the probe measuring electrode and the tank. The material is determined, so that the hanging material on the probe will not affect the normal detection.
Design feature of Power Loss Protection RF Admittance Level Switch For High Temperature
◎this product uses intelligent microprocessor components and difference measurement technology, which can measure water, sewage, mud and other liquids, especially can effectively and accurately measure strong corrosive media, and can dynamically compensate for environmental changes and hanging materials;
◎the operation is very simple. You only need to adjust the corresponding sensitivity knob according to the medium and use the surge delay filter;
◎ the upper and lower limit alarm modes can be flexibly set, and the user can set and select the normally open and normally closed contacts by himself;
◎High performance imported single pole double throw relays are used for single point and multi-point relays. The single point contact current capacity can reach 8A and the multi-point relay 3A. Can directly drive alarm devices within the range;
◎ PTFE probe is used. There is no movable device at the detection position. It is impact resistant, high-temperature resistant and corrosion-resistant.
Technical parameters of Power Loss Protection RF Admittance Level Switch For High Temperature
| Typical application | High and low alarm for liquid, dust, particles, solids and other media |
| product model | NYSP-UK861,NYSP-UK862,NYSP-UK863,NYSP-UK864,NYSP-UK865,NYSP-UK866 |
| Probe rod form | Cable type, pole type and flat type |
| Probe rod material | 500mm(The length can be customized according to the site conditions) |
| Power Supply | 24VDC,220VAC |
| Signal Output | Double pole double throw relay (DPDT) output, 5A 24VDC or 5A 220VAC |
| Ambient Temperature | -40~+80℃ |
| Process Temperature | -40~+130℃,-184~+260℃,>260℃Select ceramic high temperature probe |
| Process pressure | -0.1~2.0MPa |
| Process connection | screw thread,brackets,flange(selectable) |
| time delay | 0-30s adjustable |
| Power loss protection | Normally open, normally closed, field switchable |
| sensitivity | 0.5pf~750pf |
| Fault alarm | Upper or lower limit, adjustable on site |
| levels of protection | IP67 |
| Explosion-proof grade | Exia II CT6 Ga,Exd II CT6 Gb(See certificate for details) |
※Note:The product can be customized according to the specific requirements of users.