品牌：P+F/倍加福型号：LVL-A7-BG4B-E5PU-CG-EMS类型：音叉液位计测量范围：1-2m测量精度：1-1分辨率：1-1盲区：1-1压力：1-4供电电压：1-4V模拟输出：1-8Rated voltage：10 ... 35 V DCFusing：external 500 mA slowCurrent consumption：< 15 mAResidual ripple：5 V ss at 0 ... 400 HzMeasured variable：density冯工：13681942816QQ：2851708645

人生座右铭：顺风浪逆风投

参数表节选：的技术参数 LVL-A7-BG4B-E5PU-CG-EMSGeneral specificationsSupplyInputOutputDirective conformityConformityMeasurement accuracyOperating conditionsMechanical specificationsCertificates and approvalsAccessories

Measuring method		The tuning fork is brought to its resonance frequency by means of a piezoelectric drive. If the tuning fork is covered by liquid, this frequency changes. The electronics monitor the resonance frequency and indicate whether the tuning fork is freely vibrating or is covered by liquid.
Construction type		device with short tube
Operating mode		MAX = maximum safety: The device keeps the electronic switch closed as long as the liquid level is below the fork. example application: overspill protection MIN = minimum safety: The device keeps the electronic switch closed as long as the fork is immersed in liquid. example application: dry running protection of pumps The electronic switch opens if the limit is reached, if a fault occurs or in the event of a power fails (quiescent current principle)
Connection		This device may be used with any sequential circuit, as long as the circuit can support the electrical circuit values of the switching elements.
Rated voltage		10 ... 35 V DC
Fusing		external 500 mA slow
Current consumption		< 15 mA
Residual ripple		5 V ss at 0 ... 400 Hz
Measured variable		density
Measurement range		min. 0.7 g/cm3
Output type		switch output
Switching current		max. 250 mA
Electromagnetic compatibility
	Directive 2014/30/EU	EN 61326-1:2006 , EN 61326-2-3:2006
	Directive 2004/108/EC	EN 61326-1:2006 , EN 61326-2-3:2006
Electromagnetic compatibility		NE 21
Degree of protection		IEC 60529
Shock resistance		EN 60068-2-27
Vibration resistance		EN 60068-2-64
Climate class		DIN EN 60068-2-38/IEC 68-2-38
Reference operating conditions		- ambient temperature: 25 °C (+77 °F) - process pressure: 1 bar (14.5 psi) - fluid: water (density: approx. 1 g/cm3, viscosity: 1 mm2/s) - medium temperature: 25 °C (+77 °F) - density setting: > 0.7 g/cm3 - switching time delay: standard (0,5 s, 1 s)
Measured value resolution		< 0.5 mm
Measuring frequency		approx. 1100 Hz in air
Switching point		13 mm ± 1 mm
Non-repeatability		± 1 mm acc. to DIN 61298-2
Hysteresis		max. 3 mm
Influence of ambient temperature		negligible
Influence of medium temperature		-25 µm/°C
Influence of medium pressure		-20 µm/bar
Switching time		- 0.5 s when tuning fork is covered - 1.0 s when tuning fork is uncovered
Switch-on delay		max. 3 s
Installation conditions
	Installation position	see technical information (TI)
Ambient conditions
	Ambient temperature	-40 ... 70 °C (-40 ... 158 °F)
	Storage temperature	-40 ... 85 °C (-40 ... 185 °F)
	Shock resistance	a = 300 m/s2 = 30 g, 3 planes x 2 directions x 3 shocks x 18 ms, as per test Ea
	Vibration resistance	a(RMS) = 50 m/s2, ASD = 1.25 (m/s2)2/Hz, f = 5 to 2000 Hz, t = 3 x 2 h
Process conditions
	Medium temperature	-40 ... 150 °C (-40 ... 302 °F)
	Process pressure (static pressure)	-1 ... +40 bar (-14.5 ... +580 psi)
	State of aggregation	liquid
	Density	min. 0.7 g/cm3
	Viscosity	1 ... 10000 mPa/s, dynamic viscosity
	Solid contents	< ∅5 mm
Degree of protection		IP65 , NEMA 4X
Connection		valve connector M16
Material		process connection and short tube: stainless steel 316L (1.4401/1.4435) tuning fork: stainless steel 316L housing cover and connector: PPSU
Surface quality		Ra < 3.2 µm
Mass		approx. 169 g
Process connection		thread G1 acc. to ISO 228
Overspill protection		see approval (ZE)
Designation		see technical information (TI)