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Shenzhen Jiwei Automations Ltd.

Address：5th Floor, Baoli Building, No. 3162 Longgang Avenue, Shenzhen, P. R. China.
Tel：+86 755 28407683

Tuning Fork Level Switch

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Fork-11 Tuning Fork Level Switch

●　Reasonable design of tines and precisely adjusted of fork resonant frequency. The lowest measurable density can be as low as 0.008g/cm³.

●　Particularly suits for level measurement of powdery, fine-grained bulk solids, can effectively avoid material buildup.

●　Industry-leading performance for high temperature working environment, can tolerate process temperature up to 400℃.

●　With CE certificates, gas and dust Flameproof Enclosure and Intrinsic Safety certificates.

●　Made of strong corrosion resistant material 316L.

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Fork-11 Tuning Fork Level Switch is specially designed for powdery and fine-grained bulk solids, such as sands, fine raw materials in chemical industry, flours, salts etc. The lowest measurable medium density can be as low as 0.008g/cm³. It makes Fork-11 the best level switch for ultra-low density mediums. Fork-11 has very high reliability. It has been applied extensively.
Fork-11 Tuning Fork Level Switch probe is based on a tuning fork harmonic resonance. It utilizes piezoelectric devices to drive the fork to vibrate and detect the changes of vibration. The fork vibrates in resonant frequency when it does not contact with medium. Once the fork comes in contact with medium, vibrating amplitude of the fork will decrease substantially. Output from the detecting piezoelectric device will decrease accordingly. An integrated circuit is designed to analyze the amount of decrease and output a switch signal. By reasonably increasing the area of tines and precisely adjusting harmonic resonance, Jiwei Fork-11 Tuning Fork Level Switch offers a very high sensitivity. Therefore, the lowest measurable density can be as low as 0.008g/cm³.
●　Reasonable design of tines and precisely adjusted of fork resonant frequency. The lowest measurable density can be as low as 0.008g/cm³.

●　Particularly suits for level measurement of powdery, fine-grained bulk solids, can effectively avoid material buildup.

●　Industry-leading performance for high temperature working environment, can tolerate process temperature up to 400℃.

●　Strong self-diagnostic function helps to accurately locate the fault.

●　Easy installation and maintenance free.

●　With CE certificates, gas and dust Flameproof Enclosure and Intrinsic Safety certificates.

●　Made of strong corrosion resistant material 316L.

Applicable medium	Types of the Medium	powders or granular solids
	Density	＞0.008g/cm³
	Medium size	Max. 10mm
Fork data	Vibrating frequency	～140Hz
Fork data	Fork length	150mm
Switching Delay	When immersed	0.5s
Switching Delay	When laid bare	1s
Power supply	Relay output	20～253VAC/20～72VDC
	Two-wire	10～36V DC
	Maximum power consumption	8VA (AC)；1.5W (DC)
Output	Relay output	DPDT, 5A/253V AC/24V DC
Output	Two-wire	8/16mA, Alarm<2.3mA
Working environment	Process pressure	-1～25bar
	Process temperature	Regular: -50～150℃ High temperature: -50～250℃ Ultra high temperature:-50～400℃
	Ambient temperature	-40～80℃
	Storage and transport temperature	-40～80℃
Overvoltage protections	Relay output	Category III, class I
Overvoltage protections	Two-wire	Category III, class II
Approvals	Protection rating	IP66/IP67
	Explosion-proof types	Flameproof Enclosure: Ex d IIC T6~T1 Gb, Intrinsic Safety: Ex ia IIC T6~T1 Ga
	CE	LVD and EMC certificates
Materials	External Housing	Aluminum Alloy
	Ground terminal	316L
	Process fitting	316L
	Fork body	316L
	Process seal	Klingersil C-4400

●　Low density foam beads in the silo of a foam molding machine and a plastic forming machine.

●　Zircon sand and petroleum coke.

●　Other (ultra-low density) particles and powders.

●　After spraying PTFE on fork body, it is especially suitable for fumed silica (SiO₂) level measurement. The density of fumed silica is as low as 0.01g/cm³, and the lowest detectable value of Fork-11 is 0.008g/cm³, which fully meets the measurement requirements of fumed silica working condition.
For more information, please Contact：sales@jiweimeter.com

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