NYSP-Z Rf Admittance Level Meter​ 

The NYSP-Z RF admittance level meter is a continuous level measurement product based on radio frequency admittance principle. The product has the advantages of high stability, high sensitivity and wide application. Compared with the traditional capacitive level meter, the modularized design can realize the instrument setting succinctly and conveniently. Once the setting is completed, it can be used normally and be maintenance-free for life. Enables users to intuitively understand the operation of the equipment and deal with problems in a timely manner, as safe and reliable in complex industrial fields.

 

Rf Admittance Level Meter Technical Parameter

Applications	Liquid, dust, solid, particle and other media
Probe type	Hard poles on both ends
Measuring Range	0~6m,0~30m,0~120m
Process temperature	-40～150℃,-40～250℃,-40～800℃
Ambient temperature	-40 ℃ ~ + 70 ℃
Storage temperature	-20 ℃ ~ + 65 ℃
Process pressure	-0.1～1.6MPa,-0.1～2.5MPa,-0.1～4.0MPa,-0.1～8.0MPa
Power supply	(13-35)vDC
Signal output	4...20mA/HART/RS485/Modbus...
Process connection	Thread/Flange(selective)
Protection class	IP67
Explosion-proof grade	ExiaⅡCT6(selective)
Delay:	0 ~ 30 s adjustable

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

 

Rf Admittance Level Meter Operating Principle

Radio-frequency admittance measurement technology is a kind of material level measurement technology with unique advantages. Although the concept of capacitive measurement is similar to that of conventional capacitive measurement technology, RF admittance technology adds Driving-Shield circuit and chopper circuit to the electronic cell, so it can measure impedance and capacitive reactance separately. After passing through the laws of physics, it can be obtained that the impedance and capacitance reactance of any hanging material are equal, so the effect of the hanging material can be measured and the phase shift of the oscillating circuit is passed through, which is eliminated from the total output.
The probe of RF admittance level meter is installed in the storage tank, and the change of RF signal caused by the change of material level is obtained by the probe. The Driving-Shield End of the probe can prevent the RF current from forming a loop through the hanging material, which ensures the accuracy of the instrument measurement.

 

Rf Admittance Level Meter Design Features

◎ The unique Driving - shields circuit design can improve the ability to resist hanging
◎ No dead zone measurement, can be applied to more than ten or even a few cm level measurement occasions
◎ The output of the stable and reliable, fly ash, blanking, water vapor, crystallization, wax
◎ No activities, no easy worn parts, often without cleaning and maintenance, deb ing

◎ Anti-hanging material:The unique Driving-Shield circuit design improves the ant hanging ability.
◎ Power supply range:Power working area: 13-35VDC
◎ AdaptabilityrProbe process temperature: -100 °C 〜800 °C. No dead zone measurement, can be applied to a dozen centimeters or even a few centimeters of material level measurement occasions a large number of distance The maximum measuring range can be hundreds of meters, even hundreds of meters , The measurement of viscous material interface is a great advantage of the instrument..
◎ Stability: Stable and reliable output, resistance to fly ash, blanking, moisture, crystallization, wax effect
◎ Maintenance free:No movement, no wearable parts, no need for regular cleaning, maintenance, commissioning

 

Rf Admittance Level Meter Installation requirements

Standard installation method

• The effective measuring part of the probe can not touch the tank wall. The distance from the tank wall L is greater than 600mm.
• When there is strong stirring in the tank, the lower end of the probe should be fixed and the probe should be kept away from the mixer to ensure safety
• Instrument must be reliably grounded
• Probe can not be installed in filling nozzle (or slot) and other material flow directly through the place. If this is not possible, install a partition between the probe and the filling nozzle (or slot).
• The installation space must be considered when the hard rod probe of the instrument is installed. Cable probe should be straightened after installation to avoid short circuit with tank wall
• Installation must be very careful not to damage the insulation of the probe. The central end and shield layer of the probe shall not be in contact with the installation interface or the vessel wall, and avoid mechanical wear of the probe with the installation interface, container wall, material, etc during the use of the probe
• Instrument guard pipe must not have stagnant water, otherwise it will endanger the instrument electronic

 

Rf Admittance Level Meter Electrical connections

• Cable with relevant certification is recommended.
• With sheathed cables, the shield should be connected to both the instrument floor and the control room power supply
• Cable diameter dimensions are recommended between 6~12nnn to ensure the sealing performance of the inlet.

 

System connection

Radio frequency admittance level meter is an intrinsically safe instrument. For dangerous situations, it is necessary to install an authenticated safety gate on the power supply circuit of the instrument. Either single gate or double gate connection can be used, but the connection mode is different.