Technical Data
ComparePoint Level / Liquids
| Measuring Principle | Vibration Liquids |
| Characteristic / Application | Coated point level switch for MIN and MAX safety applications up to SIL3, Dual Sealing/ Second line of defense, Modular housing concept |
| Specialities | Outstanding features: - permanent LIVE signal monitors function safety - failsafe design and - high availability of the measuring values |
| Supply / Communication | 2-wire 4...20 mA |
| Ambient temperature | -50°C...+70°C (-58°F...+160°F) |
| Process temperature | –50°C...+150°C (–58°F...+300°F) |
| Process pressure / max. overpressure limit | Vacuum...40 bar (580 psi) |
| Min. density of medium | Density from 0.4 g/cm3 (0.4 SGU) |
| Main wetted parts | With high corrosion-resistant coating made of enamel, ECTFE and various PFA materials |
| Process connection | Flange: DN25...DN100, ASME 1"...4", JIS 10K...20K |
| Sensor length | Extension pipe up to 3 m (9.8 ft) |
| Communication | 2-wire 4...20 mA |
| Certificates / Approvals | ATEX, FM, CSA, CSA C/US, IEC Ex, NEPSI, EAC |
| Safety approvals | Overfill protection WHG Leakage Detection SIL3 |
| Options | AlloyC Material PWIS free Pressure tight feed through Weather protection |
| Components | Nivotester FTL825, Transmitter |
The Liquiphant FTL85 coated vibronic point level switch can be used in hazardous areas, has multiple international approvals, is used for fail-safe overflow protection applications and meets SIL3 functional safety requirements. With corrosion-resistant coatings of enamel, ECTFE and various PFA materials, it measures reliably. The measurement is unaffected by changes in medium properties, fluid turbulence, bubbles, foam, vibration and buildup.
Benefits
Suitable for safety systems requiring SIL2/SIL3 functional safety, in accordance with IEC 61508 Ed.2.0 / IEC 61511-1 / ISA 84-1 / DIN EN ISO 13849
Verification test: verification test interval 12 years, one-key test of the entire loop
Permanent self-monitoring/internal redundancy
4-20 mA interface (per NAMUR NE 06/NE 43): easy integration via a two-channel switching unit (safety contacts) output and latching function (Nivotester FailSafe FTL825), or direct integration with a safety PLC
No calibration required: fast and economical device startup
No mechanical moving parts, no maintenance, no wear and a long service life.
Monitors the fork for damage, corrosion, buildup and mechanical blockage
Application areas
Limit switch achieves functional safety level SIL3.
Process connection: thread and flange
Temperature: -50... +150 °C (-76... +300 °F)
Pressure: -1... +40 bar (-14.5 ... +580 psi)
Sensor length: extension tube up to 3 m (9.8 ft)
Sensor material: enamel, ECTFE and various PFA materials
International explosion protection approval, WHG overflow protection, SIL
Spare Parts & Accessories 32
32 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| 52025606 | plastic coverGasket EPDM Polyester housing | Details |
| 52025790 | Transparent coverGasket EPDM Polyester housing | Details |
| 52004137 | O-ringCover seal set Polyester housing F16 | Details |
| 52004133 | Adapterfor Polyester housing F16 | Details |
| 52004134 | Adapterfor Polyester housing F16 | Details |
| 52004135 | Adapterfor Polyester housing F16 | Details |
| 52002698 | Aluminum coverO-ring EPDM for Aluminium housing F13, Ex d | Details |
| 52002699 | Aluminum coverO-ring EPDM for Aluminium housing F17 | Details |
| 52027693 | Aluminum coverO-ring 70,0x3,0 EPDM for Aluminium housing F13/F17/F18 not for EEx d | Details |
| 71114754 | CoverMaterial: 316L. O-ring 70.0x3.0 EPDM. Usage: stainless steel housing F27, FTL50/FTL51/FTL51C, FTL70/FTL71, FTL80/FTL81/FTL85. | Details |
| 71185025 | CoverMaterial: 316L. O-ring 70.0x3.0 FVQM. Usage: stainless steel housing F27, FTL80/FTL81/FTL85, FTM50/FTM51/FTM52. | Details |
| 52004277 | Seal kitconsists of: 10x O-ring 70,0x3,0 EPDM | Details |
| 71114756 | Seal kitConsists of: 5x O-ring 70.0x3.0 FVQM. Usage: FTL50/FTL51/FTL51C, FTL70/FTL71, FTL80/FTL81/FTL85. | Details |
| 52027000 | Stainless Steel CoverGasket 67,5x2,9x1,5 VMQ/PTFE Stainless steel housing F15 | Details |
| 52027002 | Window cover with gasketSight glass: glass Gasket 67,5x2,9x1,5 VMQ/PTFE Stainless steel housing F15 | Details |
| 52028179 | gasketProfile gasket for cover Stainless steel housing F15 | Details |
| 52002447 | cable entryconsists of: adapter M20 > G1/2, 304 gasket NBR blind plug G1/2 Cerabar M, Liquiphant M | Details |
| 52002448 | cable entryconsists of: adapter M20 > NPT1/2, 304 gasket NBR plug NPT1/2 Cerabar M, Liquiphant M | Details |
| 52004278 | cable glandconsists of: cable gland M20 O-ring FKM, plug Pg11 PA | Details |
| 71185029 | cable glandConsists of: cable gland M20, metal. O-ring 17.0x2.0 EPDM + PTFE/FDA. Usage: stainless steel housing F15, FTL50/FTL50H/FTL51/FTL51C/FTL51H, FTL70/FTL71, FTL80/FTL81/FTL85. | Details |
Configurator / Comparison
Source: public information from the Endress+Hauser website
Measuring principle video
Click to playManuals & Documents 7
All documents for this model7 documents · click to expand
BA Liquiphant FailSafe FTL85 Chinese
Liquiphant FailSafe FTL80, FTL81, FTL85 Operating Instructions English
BA Liquiphant FailSafe FTL85 English
技术资料 Liquiphant FailSafe FTL80, FTL81, FTL85 Chinese
TI Liquiphant FailSafe FTL85 Chinese
Liquiphant FailSafe FTL80, FTL81, FTL85 Technical Information English
TI Liquiphant FailSafe FTL85 English
Case Studies
Municipal Wastewater Treatment · tuning fork — Application Case
Site Conditions
This is a Municipal Wastewater Treatment customer whose plant is at the inlet, biological and outlet stages of a municipal plant. The main task was vibrating-fork point level detection and high/low alarms.
The Problem
The difficulty lies in high solids and corrosive fractions, with large diurnal flow swings; at the same time effluent parameters drift and probes foul with sludge and biofilm. Specification therefore means choosing fork length and surface finish by density and stickiness.
What We Did
We took a level range approach — level solution matched to the actual tank and silo geometry. Delivery was built around choosing fork length and surface finish by density and stickiness, with point-by-point checks on: stable compliance with Grade 1A discharge limits and online data reporting.
Operating Outcome
In service the system performs as intended — no calibration needed, with dependable switching, with routine maintenance falling noticeably.
Food & Beverage · tuning fork — Application Case
Application Context
dosing, pasteurising, filling and CIP stages is a typical Food & Beverage duty. The project started from tuning fork, focusing on vibrating-fork point level detection and high/low alarms.
Process Constraints
frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles, and syrups, dairy and beverages that scale easily, under strict hygienic requirements only amplify it. The tuning fork specification must therefore cover choosing fork length and surface finish by density and stickiness.
Delivery Approach
Delivery was handled as the level range — level solution matched to the actual tank and silo geometry. Execution centred on choosing fork length and surface finish by density and stickiness, together with food-safety and hygienic design per 3-A / EHEDG.
Field Results
Operation shows the benefit clearly — no calibration needed, with dependable switching, with confidence in this measuring point improving markedly.
Chemical & Pharmaceutical · tuning fork — Application Case
Customer Profile
The typical setting in Chemical & Pharmaceutical is reactors, metering vessels and finished-product tanks. The measuring point is tuning fork; the focus is vibrating-fork point level detection and high/low alarms.
Key Difficulties
Conditions are highly corrosive media with solvents and crystallisation, partly in explosive atmospheres and, on top of that, corrosion plus Ex protection shortens instrument life and makes downtime costly, which a standard configuration cannot handle for long. The design therefore starts with choosing fork length and surface finish by density and stickiness.
Implementation
The scope ran through the level range: level solution matched to the actual tank and silo geometry. Technically it hinges on choosing fork length and surface finish by density and stickiness, and on these requirements: Ex certification and GMP traceability of records.
Customer Benefit
In practice this means no calibration needed, with dependable switching, which cut the workload on the site maintenance team.
Power & Energy · tuning fork — Application Case
Project Background
The project covers boiler feedwater, turbine condensate and FGD/DeNOx systems. The work centres on tuning fork and the core task is vibrating-fork point level detection and high/low alarms.
Operating Challenges
The medium and duty are characterised by high temperature and pressure with both steam and saline water, and drift under high temperature and pressure, with very costly unplanned outages. So tuning fork cannot be specified generically — it calls for choosing fork length and surface finish by density and stickiness.
Solution
The Ainstru engineering team worked through the level range: level solution matched to the actual tank and silo geometry. The configuration involves choosing fork length and surface finish by density and stickiness, with these requirements in view: compliance with power-industry codes and unit availability targets.
Results
Since start-up the system has run steadily; the practical result is no calibration needed, with dependable switching.
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