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FTL31-AA4U3AAWBJ Factory Sealed Plc Module Tuning Fork Switch New

Categories Level Transmitter
Brand Name: E+H
Model Number: FTL31
Place of Origin: China
MOQ: 1 pc
Price: USD 220 1 pc
Payment Terms: T/T
Supply Ability: 100 pc 1 week
Delivery Time: 7-14 days
Wetted Material: Stainless Steel
Mounting Method: DIN rail or wall mount
Mounting: Direct or remote
Temperature Range: -40 to 85°C
Process Connection: 1/2" NPT
Vacuum Resistance: 10 mbar (0.15 psi)
Output Signal: 4-20 mA
Diaphragm Material: 316L Stainless Steel
Supply Voltage: 10-30 VDC
Protection Rating: IP65
Flange Material: 316SST
Range: 0-10,000 psi
Turndown Ratio: 100:1
Voltage: 1-5 (V)
Power Supply: 10-30 VDC
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FTL31-AA4U3AAWBJ Factory Sealed Plc Module Tuning Fork Switch New

What is the Liquiphant FTL31

  • The Liquiphant FTL31 is a point level switch designed for detecting liquid level (or the presence/absence of liquid) at a specific point (as opposed to continuous level measurement).
  • It uses the vibronic / tuning fork principle: a fork vibrates at a given resonance frequency; when the fork is immersed in a liquid, that resonance frequency shifts, which is detected by the electronics.

Key Technical Specifications

Here are some of its main specs & capabilities:

Spec

Value / Range

Process temperature

40 °C to +150 °C

Process pressure

Vacuum up to +40 bar (≈ 580 psi)

Minimum density of medium

Standard >0.7 g/cm³; optionally >0.5 g/cm³

Wetted materials

Stainless steel 316L (for all parts in contact with process liquid)

Process connections

Various threaded connections: G½, G¾, G1, NPT etc.

Electrical / Output options

3-wire DC-PNP (10-30 V DC), or 2-wire AC/DC (20-253 V)

Communication / Features

Some versions have IO-Link; continuous self-monitoring; LED indicators; plug-and-play, no calibration needed.


Applications / Use Cases

  • Overfill protection: to detect when liquid reaches a certain high level to prevent spillovers.
  • Dry-run protection: detecting when a pump’s liquid level drops too low.
  • Lower level detection: as a safety / control switch in tanks, vessels, pipes.
  • Industrial machinery, cleaning systems, anywhere a simple reliable point-level detection is needed.

Key Advantages

  • Reliability & Safety: It has built-in continuous self-monitoring, meaning if power is lost or there's a fault, the sensor gives a safe (fail) signal.
  • Insensitive to many disturbances: Turbulence, flows, air bubbles, conductivity, foam-build-up or changing media properties have little to no effect. The resonance-based tuning fork is fairly robust in these conditions.
  • No calibration needed: Reduces setup time and maintenance.
  • Compact and rugged design: Stainless steel housing; various mounting and connection options; high pressure/temperature capability.
  • Multiple output / electrical versions: Good flexibility to match with different control systems (DC, AC, PNP, etc.).

Things to Consider / Limitations

  • Minimum density requirement: Standard versions require medium density >0.7 g/cm³. If your liquid is lighter, you’ll need the optional version (>0.5 g/cm³).
  • Not suitable for all hazardous-area use: The FTL31 is not suited for some hazardous area classifications; for hygienic or especially demanding environments, other models (e.g. FTL33) might be more appropriate.
  • Switching point location depends on installation: Orientation, mounting, distance from walls, etc., can affect the exact switch point. Proper installation is important (vertical, horizontal, ensuring fork drains off etc.).
  • Response time / hysteresis: There is some delay when the fork is covered vs uncovered, and hysteresis (difference between on/off switching) to be considered in tight control loops.

Quality FTL31-AA4U3AAWBJ Factory Sealed Plc Module Tuning Fork Switch New  for sale
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