E+H Liquicap FTI51 Level Switch

Fits liquid, interface, or foam point-level detection where a capacitance rod probe is specified — probe length up to 6 m (20 ft), media −80 to +200 °C, vacuum…100 bar, active build-up compensation, with WHG / SIL / Ex / marine / NACE options per order code.

Key advantages

Capacitance rod point level — Liquids, interfaces, and foam; probe length up to 6 m.
Build-up compensation — Push-button calibration with active build-up compensation.
Wide T/P class — Media −80…+200 °C; vacuum…100 bar; PTFE/PFA insulation options.
SIL / WHG / marine options — Multiple inserts (PFM, relay, DC-PNP, 8/16 mA) by order code.

Typical applications

Liquid and interface point level with coating or foam present.
Hygienic Tri-Clamp / dairy connections needing capacitance rods.
High-pressure or low-temperature liquid switching beyond conductive-probe limits.

Selection guide

Measuring range — Capacitance rod point level for liquids/interfaces/foam; probe length up to 6 m (20 ft).
Accuracy — Push-button calibration; active build-up compensation; short reaction time.
Output — 2-wire 19–253 VAC; 3-wire; PFM; Relay DPDT; DC-PNP; 8/16 mA.
Supply — Per electronic insert / communication option in TI01530.
Process connection — G/NPT ½…1½; flanges DN25+/ASME 1+/JIS; Tri-Clamp / dairy / flush hygienic.
Wetted materials — 316L; insulation PTFE/PFA (FDA-listed materials).
Housing — Per order code (incl. separate housing option).
IP — Per TI01530 housing tables.
Media temperature — −80 to +200 °C (−112 to +392 °F).
Ambient — −50 to +70 °C; separate housing −50 to +120 °C.
Process pressure — Vacuum … 100 bar (Vacuum … 1450 psi).
Communication — PFM to FTC325/FTC625; 3-wire FTC325; relay/DC-PNP/8-16 mA inserts.
Approvals — WHG overfill, SIL, ATEX/FM/CSA/IECEx/INMETRO/NEPSI/EAC, Marine GL/ABS/DNV, NACE MR0175.
Notes — Specs from Endress+Hauser TI01530F/00/EN/03.25-00 (2025-02-14) + product page..

Common mistakes

Leaving electronic insert blank — 2-wire 19–253 VAC / 3-wire / PFM / Relay DPDT / DC-PNP / 8/16 mA change supply and FTC325/FTC625 pairing.
Ordering short probe when interface/foam needs up to 6 m — state length on the RFQ.
Ignoring build-up — active build-up compensation is listed; still confirm insulation PTFE/PFA and medium dielectric.
Assuming every marine/NACE/WHG mark is on every code — marks are option-dependent.

When to RFQ / what to tell us

Probe length (to 6 m), liquid/interface/foam duty, and electronic insert / PFM switching unit.
Process connection (G/NPT / flange / Tri-Clamp / dairy / flush), insulation PTFE/PFA, Ex/WHG/SIL/marine/NACE needs.
Media T/P, separate housing yes/no (−50…+120 °C ambient on separate housing), quantity, ship-to.

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Specs

Spec	Value
SKU	48561
Brand	Endress+Hauser
Model	Liquicap FTI51
Product type	level_switch
Measuring range	Capacitance rod point level for liquids/interfaces/foam; probe length up to 6 m (20 ft)
Accuracy	Push-button calibration; active build-up compensation; short reaction time
Output signal	2-wire 19–253 VAC; 3-wire; PFM; Relay DPDT; DC-PNP; 8/16 mA
Supply voltage	Per electronic insert / communication option in TI01530
Process connection	G/NPT ½…1½; flanges DN25+/ASME 1+/JIS; Tri-Clamp / dairy / flush hygienic
Wetted materials	316L; insulation PTFE/PFA (FDA-listed materials)
Housing material	Per order code (incl. separate housing option)
IP rating	Per TI01530 housing tables
Media temperature	−80 to +200 °C (−112 to +392 °F)
Ambient temperature	−50 to +70 °C; separate housing −50 to +120 °C
Process pressure	Vacuum … 100 bar (Vacuum … 1450 psi)
Communication	PFM to FTC325/FTC625; 3-wire FTC325; relay/DC-PNP/8-16 mA inserts
Approvals	WHG overfill, SIL, ATEX/FM/CSA/IECEx/INMETRO/NEPSI/EAC, Marine GL/ABS/DNV, NACE MR0175
Notes	Specs from Endress+Hauser TI01530F/00/EN/03.25-00 (2025-02-14) + product page.

Documents

FAQ

Q: What duty? A: Capacitance rod point level for liquids/interfaces/foam; probe length up to 6 m; push-button calibration with active build-up compensation.

Q: Temperature/pressure? A: Media −80 to +200 °C; process vacuum…100 bar; ambient −50 to +70 °C (separate housing −50 to +120 °C).

Q: What should I send for a quote? A: Length, insert, connection, marks, T/P, quantity. Compatible with systems using E+H Liquicap FTI51 — we do not claim authorized-dealer status.