E+H Soliphant FTM51 Level Switch

Fits fine-grained or dusty bulk-solids point level where a vibronic fork is specified — extension pipe 300–4000 mm (to 6000 mm on request), standard fork from 10 g/l (short fork 50 g/l), media −50 to +280 °C, vacuum…25 bar, with SIL 2 and broad Ex marks.

Key advantages

• Vibronic solids point level — Fine-grained/dusty bulk solids; no media calibration required.
• Low density capability — Standard fork from 10 g/l; short fork 50 g/l.
• Extension 300–4000 mm — To 6000 mm on request; media −50…+280 °C; vacuum…25 bar.
• SIL 2 capable — Multiple electronic inserts (DC-PNP, AC, relay, NAMUR, PFM) and Ex marks by code.

Typical applications

• Silo and hopper high/low alarms on powders and dusty bulk solids.
• Plants specifying vibronic forks instead of paddle or capacitance solids switches.
• SIL-rated solids overfill / empty protection by matching order codes.

Selection guide

• Measuring range — Vibronic point level for fine-grained/dusty bulk solids; extension pipe 300–4000 mm (to 6000 mm on request).
• Accuracy — No media calibration required; selectable density setting and switching delay.
• Output — DC-PNP 3-wire; AC 2-wire; relay DPDT; 8/16 mA; NAMUR; PFM (electronic insert dependent).
• Supply — Per electronic insert (AC 19…253 V; DC options; NAMUR/PFM per TI01571).
• Process connection — Thread R 1½ / NPT 1¼–1½; EN/ASME/JIS flanges; Tri-Clamp hygienic.
• Wetted materials — 316L (3.2 µm / 0.8 µm); PTFE coated; ETFE coated options.
• Housing — Aluminum / stainless / polyester housing codes per TI.
• IP — Per housing selection in TI01571.
• Media temperature — −50 to +280 °C (−60 to +540 °F).
• Ambient — −50 to +70 °C (−60 to +160 °F).
• Process pressure — Vacuum … 25 bar (Vacuum … 360 psi).
• Min density — Standard fork 10 g/l; short fork 50 g/l.
• Communication — PFM / NAMUR switching to FTL325/FTL375 family switching units.
• Display — Switch status visible externally (housing-dependent).
• Approvals — SIL 2 IEC 61508, ATEX/FM/CSA/IECEx/INMETRO/NEPSI/EAC, EN 10204-3.1.
• Notes — Specs from Endress+Hauser TI01571F/00/EN/03.21 and FTM51 product page..

Common mistakes

• Using liquid vibrating-fork assumptions — FTM51 is for fine-grained/dusty bulk solids; min density 10 g/l (standard) / 50 g/l (short).
• Leaving electronic insert blank — DC-PNP / AC 2-wire / relay DPDT / 8/16 mA / NAMUR / PFM change supply and switching-unit pairing (FTL325/FTL375).
• Undersizing extension — 300–4000 mm standard; to 6000 mm on request.
• Ignoring coating options (PTFE/ETFE) when product builds up on 316L.

When to RFQ / what to tell us

1. Bulk solid density/particle size, extension length, standard vs short fork, and electronic insert.
2. Process connection (thread/flange/Tri-Clamp), coating, Ex/SIL, media T/P.
3. Quantity, ship-to, switching-unit need (FTL325/FTL375) if PFM/NAMUR.

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Specs

Documents

• Endress+Hauser Soliphant FTM51 datasheet (PDF)
• Endress+Hauser Soliphant FTM51 datasheet (PDF)

FAQ

Q: Liquid or solids? A: Vibronic point level for fine-grained/dusty bulk solids — not a liquid fork.

Q: Min density? A: Standard fork 10 g/l; short fork 50 g/l — selectable density setting and switching delay; no media calibration required.

Q: What should I send for a quote? A: Density, length, insert, connection, Ex/SIL, quantity. Compatible with systems using E+H Soliphant FTM51 — we do not claim authorized-dealer status.

Links

• Level instruments · Level switch buying guide
• Request a Quote · Get selection help