AVS61 Series
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.
Features
- Status indicator light, visual and convenient
- No adjustment required, quick start-up
- Supports one-key calibration, safe and reliable
- Multiple fork body structures are available, applicable to liquids, solid particles, powders, etc.
- No mechanical moving parts, maintenance-free, long service life
- Reliable switching action, unaffected by flow, turbulence, bubbles, etc.
- Can be used in safety systems compliant with SIL2 / SIL3 functional safety requirements
Specification
| Vibration Frequency | : | Min. 330 Hz / Max. 1320 Hz |
| Measured Medium | : | Liquid, Powder, Solid, Lump Solid |
| Density of Medium | : | Liquid, ≥0.7 g/cm3 |
| : | Solid, ≥0.32 g/cm3 | |
| : | Powder, ≥0.05 g/cm3 | |
| Liquid Viscosity | : | 0.1 – 10000 cST |
| Switch Point | : | End 13 mm, 25 mm, 35 mm, 40 mm |
| Accuracy | : | Max. +/-1 mm (Water, 23 °C, 1 atm) |
| Repeatability | : | 0.1 mm |
| Hysteresis | : | 2 mm |
| Temp. Influence | : | Max. +1.8 ~ -2.8 mm (-40~250 °C) |
| Density Influence | : | Max. +4.8 ~ -3.5 mm (0.5~1.5 g/cm3) |
| Pressure Influence | : | Max. -2.5 ~ 0 mm (-1.0~60 bar) |
| Torque | : | 10 Nm |
| Wetted Parts Material | : | S.S. 304 / S.S. 316L / S.S. 316L + PTFE |
| Process Connection | : | Thread / Flange / Tri-Clamp |
| Thread | : | BSPP / NPTM |
| Flange | : | ANSI / DIN / JIS |
| Tri-Clamp | : | HKB (ISO2852) / HDB (DIN32676) |
| Ambient Temperature | : | -20~70 °C |
| Process Temperature | : | -40~250 °C |
| Process Pressure | : | -1.0~16 bar (Standard), -1.0~64 Bar (Option) |
| Protection Class | : | IP65 (DIN EN175301-803A/M12*1) |
| : | IP67 (Aluminum Alloy Housing) | |
| : | Explosion Proof, Ex db IIC T6 | |
| (Aluminum Alloy Housing) |
| Status Indicator Light | : | Green (Power), Red (Output) |
| Switching Time | ||
| When fork is covered | : | about 1.0 s |
| When fork is exposed | : | about 1.0 s |
| Power Supply / Rating | ||
| DPDT Relay Output | : | 20-72 VDC or 20-250 VAC (Only for |
| aluminum alloy housing) | ||
| Rating | : | Max. 4 A, 250 V |
| SPDT Relay Output | : | 20-55 VDC (Only for M12 Junction Box) |
| SPST Relay Output | : | 20-55 VDC (Only for DIN EN175301-803A) |
| Rating | : | Max. 4 A, 55 V |
| PNP / NPN Output | : | 18-50 VDC, 3-Wire |
| Rating | : | <1.5 W |
| 8 / 16 mA Output | : | 12.5-30 VDC, 2-Wire |
| (Only for aluminum alloy housing) | ||
| Rating | : | <0.6 W |
| NAMUR Output | : | IEC 60947-5-6 (7-9 VDC), 2-Wire |
| (Only for aluminum alloy housing) | ||
| Rating | : | <1.0 mA or > 2.2 mA |
| Power Consumption | : | Less than 1 W |
| Junction Box | ||
| Aluminum Alloy Housing | : | Standard: M20 * 1.5, Option: 1/2″ NPTF |
| DIN EN175301-803A | : | 4-Pin, Without Outlet Cable |
| M12 * 1 | : | 5-Pin, Standard Outlet Cable 1.5 m |
| Tuning Fork Length | : | 45 mm (Type A) |
| : | 100 mm (Type B) | |
| : | 200 mm (Type C / Type D) | |
| Extension Length | : | Max. 2000 mm |
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