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| AVS61 Series |
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AVS61 Series Tuning
Fork Vibrating Level Switch features a core element that is a pair of
tuning forks with integrated vibrator. The vibrating fork oscillates at
its natural frequency, the resonance frequency decreases when the
vibrating fork comes into contact with a medium. The
frequency change is detected and is converted to a switching signal
output. AVS61 Series supports multiple switching signal outputs, such as
relay, PNP or NPN, NAMUR, and 8 / 16 mA.
AVS61 Series is suitable for limit detection of liquid / material
levels in vessels, dry-run protection of pumps, pipeline overflow
protection, etc. It is widely used in petroleum, chemical industry, tap
water, wastewater, food, pharmaceuticals, and other industries |
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| FEATURES |
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Status indicator light, visual and convenient
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No adjustment required, quick start-up
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Supports one-key calibration, safe and reliable
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Multiple fork body structures are available, applicable to liquids, solid particles, powders, etc.
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No mechanical moving parts, maintenance-free, long service life
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Reliable switching action, unaffected by flow, turbulence, bubbles, etc.
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Can be used in safety systems compliant with SIL2 / SIL3 functional safety requirements
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| SPECIFICATION |
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| Vibration
Frequency
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Min. 330 Hz / Max. 1320 Hz
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Measured Medium
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Liquid, Powder, Solid, Lump Solid
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Density of Medium
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Liquid, ≥0.7
g/cm3
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Solid, ≥0.32
g/cm3
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Powder, ≥0.05
g/cm3
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Liquid Viscosity
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0.1 - 10000 cST
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Switch Point
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End 13 mm, 25 mm, 35
mm, 40 mm
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Accuracy
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Max. +/-1 mm (Water, 23 °C, 1 atm)
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Repeatability
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0.1 mm
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Hysteresis
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2 mm
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Temp. Influence
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Max. +1.8 ~ -2.8 mm (-40~250 °C)
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Density Influence
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Max. +4.8 ~ -3.5 mm (0.5~1.5 g/cm3)
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Pressure Influence
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Max. -2.5 ~ 0 mm (-1.0~60 bar)
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Torque
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10 Nm
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Wetted Parts Material
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S.S. 304 /
S.S. 316L / S.S. 316L + PTFE
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Process Connection
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Thread / Flange / Tri-Clamp
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Thread
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BSPP / NPTM
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Flange
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ANSI / DIN / JIS
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Tri-Clamp
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HKB (ISO2852) / HDB (DIN32676)
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Ambient Temperature
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-20~70 °C
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Process Temperature
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-40~250 °C
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Process Pressure
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-1.0~16 bar (Standard), -1.0~64 Bar (Option)
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Protection Class
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IP65 (DIN EN175301-803A/M12*1)
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IP67 (Aluminum Alloy Housing)
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Explosion Proof, Ex db
IIC T6
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(Aluminum Alloy Housing)
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Status
Indicator Light
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Green (Power), Red (Output)
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Switching Time
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When fork is covered
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about 1.0 s
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When fork is exposed
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about 1.0 s
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Power Supply / Rating
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DPDT Relay Output
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20-72 VDC or
20-250 VAC (Only for
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aluminum alloy housing)
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Rating
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Max. 4 A, 250 V
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SPDT Relay Output
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20-55 VDC (Only for M12 Junction Box)
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SPST Relay Output
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20-55 VDC (Only for DIN EN175301-803A)
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Rating
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Max. 4 A, 55 V
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PNP / NPN Output
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18-50 VDC, 3-Wire
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Rating
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<1.5 W
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8 / 16 mA Output
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12.5-30 VDC,
2-Wire
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(Only for aluminum alloy housing)
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Rating
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<0.6 W
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NAMUR Output
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IEC
60947-5-6 (7-9 VDC), 2-Wire
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(Only for aluminum alloy housing)
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Rating
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<1.0 mA or > 2.2 mA
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Power Consumption
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Less than 1 W
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Junction Box
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Aluminum Alloy Housing
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Standard: M20 * 1.5, Option: 1/2" NPTF
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DIN EN175301-803A
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4-Pin, Without Outlet Cable
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M12 * 1
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5-Pin, Standard Outlet Cable 1.5 m
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Tuning Fork Length
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45 mm (Type A)
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100 mm (Type B)
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200 mm (Type C / Type D)
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Extension Length
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Max. 2000 mm | |
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