E+H Liquiphant FTL50H Level Switch

Fits food and life-science liquid point-level duties that need a hygienic vibronic tuning-fork switch — density ≥0.5 g/cm³ (default setting ≥0.7), media −50 to +150 °C, compact FTL50H with SIL2/SIL3 and ASME BPE-oriented hygienic connections.

Key advantages

Point level — Point level detection for liquids; density ≥0.5 g/cm³ (default ≥0.7 g/cm³ switch setting); viscosity ≤10,000 mm²/s.
Temperature — −50 to +150 °C (−58 to 302 °F).
Wetted parts — 316L stainless / polished tuning fork (hygienic).
Outputs — Electronic inserts FEL5x (e.g. DC PNP, relay) per ordering; FEL50D density variant to FML621.
Approvals — SIL2/SIL3 (IEC 61508/61511); ASME BPE / food & pharma hygienic designs.

Typical applications

Hygienic tank high/low liquid detection in food and pharma (FTL50H/FTL51H family).
CIP/SIP-friendly 316L polished fork point level where vibronic is preferred over float switches.
SIL2/SIL3 liquid switching loops with FEL5x electronic inserts.
Density-capable FEL50D variants feeding FML621 density evaluation (when ordered).

Selection guide

Density / viscosity — Default switch ≥0.7 g/cm³; detection from ≥0.5 g/cm³; viscosity ≤10,000 mm²/s — confirm product density.
Electronic insert — FEL5x (DC PNP, relay, etc.); FEL50D density path to FML621 — lock insert before RFQ.
Connection — Hygienic process connections (food/pharma FTL50H/FTL51H); compact FTL50H.
Pressure — Up to 100 bar (1450 psi) for version P per OEM notes.
IP — IP65/66/67/68/69 depending on housing (TI00328 table).

Common mistakes

Using FTL50H on bulk solids — this is a liquid Liquiphant; solids need Soliphant (e.g. FTM20/FTM51).
Leaving density setting at default ≥0.7 when the product is between 0.5 and 0.7 g/cm³.
Ordering compact FTL50H when pipe/extension FTL51H length is required.
Ignoring electronic insert — DC PNP vs relay vs FEL50D changes supply and switching-unit pairing.

When to RFQ / what to tell us

Liquid density/viscosity, media T/P, and hygienic connection type (ASME BPE / food).
Electronic insert (DC PNP / relay / FEL50D), SIL need, housing/IP.
Quantity, ship-to, compact FTL50H vs extended FTL51H preference.

Request a Quote · Get selection help

Specs

Spec	Value
SKU	47009
Brand	Endress+Hauser
Model	Liquiphant FTL50H
Product type	vibroniclevelswitch
Process pressure	Up to 100 bar (1450 psi) for version P (OEM notes)
Measuring Range	Point level detection for liquids; density ≥0.5 g/cm³ (default ≥0.7 g/cm³ switch setting); viscosity ≤10,000 mm²/s
Accuracy	Vibronic switching; not a continuous level transmitter — switching point density-dependent (see TI00328)
Output Signal	Electronic inserts FEL5x (e.g. DC PNP, relay) per ordering; FEL50D density variant to FML621
Process Connection	Hygienic process connections (food/pharma FTL50H/FTL51H); compact FTL50H
Media Temperature	−50 to +150 °C (−58 to 302 °F)
Wetted Materials	316L stainless / polished tuning fork (hygienic)
Ip Rating	IP65/66/67/68/69 depending on housing (TI00328 table)
Sensor Type	Vibronic tuning-fork point level switch (Liquiphant M)
Approvals	SIL2/SIL3 (IEC 61508/61511); ASME BPE / food & pharma hygienic designs
Notes	Process pressure up to 100 bar (1450 psi) for version P. Specs from TI00328FEN Liquiphant M FTL50/51/50H/51H.

Documents

Endress+Hauser Liquiphant M operating instructions (PDF)

FAQ

Q: Liquid or solids? A: Liquiphant FTL50H is vibronic point level for liquids. For fine-grained solids use Soliphant (FTM20/FTM51).

Q: Min density? A: Detection from ≥0.5 g/cm³; default switch setting ≥0.7 g/cm³; viscosity ≤10,000 mm²/s.

Q: What should I send for a quote? A: Density, connection, insert, SIL, T/P, quantity. Compatible with systems using E+H Liquiphant FTL50H — we do not claim authorized-dealer status.