音叉限位检测开关
The Liquiphant FTL51H vibronic point level switch with extension tube can be used in hazardous areas and has various international approvals. With hygienic certifications such as 3-A, EHEDG and ASME BPE, it is especially suitable for the food and life sciences industries. The FTL51H achieves SIL2/SIL3 functional safety, and the second line of defense ensures the highest degree of device safety and availability. The measured value is stable and unaffected by flow, turbulence, bubbles, foam, vibration, solids content or buildup.
Benefits
Suitable for safety systems requiring SIL2/SIL3 functional safety, in accordance with IEC 61508/IEC 61511-1
Various process connections available
Various electronic inserts, such as NAMUR, relay, semiconductor thyristor, PFM signal output, for connection to various process control systems
Also available with PROFIBUS PA communication protocol
No calibration required: fast and economical device startup
No mechanical moving parts, no maintenance, no wear and a long service life. Fork damage can be monitored to ensure proper function
FDA-listed material (PFA Edlon)
Application areas
Limit switch with electropolished surface, for detection of all types of liquids.
Process connection: thread, flange and hygienic connections (clamp, milk coupling, aseptic, DRD, SMS, Varivent)
Temperature: -50 ~ +150 °C (-58 ~ +302 °F)
Pressure: -1 ~ +64 bar (-14.5 ~ +928 psi)
Sensor material: 316L
International explosion protection approval, WHG overflow protection, SIL, hygienic approval, marine approval
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Technical information
Technical data
Documents/Manuals/Software
Accessories/Spare parts
Source: public information from the Endress+Hauser website
Technical Data
CompareDensity
| Measuring Principle | Vibration Density |
| Characteristic / Application | Premium device for density measurement in hygienic/aseptic applications. Focus Food & Beverage and Life Sciences. Sensor with pipe extension up to 3 m (9,85 ft). Modular housing or completely welded compact housing. Wide range of certificates. |
| Supply / Communication | via density controller FML621 |
| Ambient temperature | -40 °C...70 °C (-40...158 °F) |
| Process temperature | 0...80 °C (32…176 °F) |
| Process pressure | 0...25 bar (0…362 psi) |
| Wetted parts | 316L |
| Hygienic | 3A EHEDG |
| Sensor length | Short tube (Liquiphant II) 148mm…3000mm (6,00…118") |
| Output | Pulse |
| Certificates / Approvals | ATEX, FM, CSA C/US, IEC Ex, TIIS, INMETRO, NEPSI |
| Specialities | Density/Concentration measurement in combination with density controller FML621, Surface finish: mechanical polished (up to 0.3 µm) |
| Components | Density Computer FML621 |
Point Level / Liquids
| Measuring Principle | Vibration Liquids |
| Characteristic / Application | Premium device for point level detection in hygienic/aseptic applications. Focus Food & Beverage and Life Sciences. Pipe extension up to 3 m (9,85 ft). Modular & completely welded housing concept, Wide range of certificates. |
| Specialities | Plug and play functionalities, Surface finish: mechanical or electro-polished, Density/Concentration measurement, SIL 2/3 according to IEC 61508 |
| Supply / Communication | PROFIBUS PA, 19 ..253V AC, 10...55V DC-PNP, 19...253V AC or 19...55V DC with relay DPDT, 8/16mA, NAMUR, PFM |
| Ambient temperature | -50 °C...+70 °C (-58 °F...+158 °F) |
| Process temperature | -50 °C...+150 °C (-58 °F...+302 °F) |
| Process pressure / max. overpressure limit | Vacuum...64 bar (Vacuum...928 psi) |
| Min. density of medium | 0.5g/cm³ (0.4g/cm³ optional) |
| Main wetted parts | 316L |
| Process connection | Threads (for weld-in adapter): G3/4A, G1A, Flange: DN25...DN100, ASME 1"...4", JIS 25A...100A |
| Process connection hygienic | Tri-Clamp, DIN 11851, DIN11864-1 Ingold, Flush mount, DRD, SMS1145, Varivent (Varinline) |
| Sensor length | Short tube (Liquiphant II) 148mm…3000mm (6,00…118") |
| Communication | PROFIBUS PA |
| Certificates / Approvals | ATEX, IEC Ex, FM, CSA C/US, TIIS, INMETRO Ex, NEPSI Ex |
| Safety approvals | Overfill protection WHG, SIL 2/ SIL 3 |
| Design approvals | Inspection certificate 3.1, EN10204, CoC ASME BPE, Conformity to cGMP, EU Food Contact Material (EC) 1935/2004, US Food Contact Material FDA CFR 21, CN Food Contact Material GB 4806, Declaration of Conformity ASME B31.3, AD2000, CRN approval |
| Hygienic approvals | 3-A, EHEDG, CoC-ASME BPE |
| Marine approval | GL/ ABS/ DNV |
| Options | Customized settings (Density) |
| Components | FTL325P/FTL375P Interface PFM FTL325N/FTL375N Interface NAMUR |
| Successor | FTL63 |
Related Models
| Model | Name |
|---|---|
| FTL51H-ATE2BC2G6A | 音叉限位检测开关 |
| FTL51H-EEE2DC2G7A | 音叉限位检测开关 |
| FTL51H-GTE2BC5G6C | 音叉限位检测开关 |
| FTL51H-GTE2DCDN6A | 音叉限位检测开关 |
Case Studies
市政污水处理污水处理厂 · 音叉应用案例
项目背景
市政污水处理客户在污水处理厂环节，长期面临「出水水质监测精度不足、仪表易受污染导致数据漂移，影响达标排放」的困扰，对音叉的稳定性与测量精度提出了更高要求。
解决方案
阿仪科技技术团队结合现场工况，为客户选配了适配的音叉，并完成选型、安装、调试与整定的一站式交付。
实施效果
- 测量精度与响应速度显著提升，数据稳定可靠；
- 仪表适应市政污水处理复杂工况，维护量大幅降低；
- 助力客户实现连续在线监测与降本增效，获得客户高度认可。
食品饮料食品生产线 · 音叉应用案例
项目背景
食品饮料客户在食品生产线环节，长期面临「卫生级测量要求高，在线仪表需耐 CIP/SIP 清洗且精度稳定」的困扰，对音叉的稳定性与测量精度提出了更高要求。
解决方案
阿仪科技技术团队结合现场工况，为客户选配了适配的音叉，并完成选型、安装、调试与整定的一站式交付。
实施效果
- 测量精度与响应速度显著提升，数据稳定可靠；
- 仪表适应食品饮料复杂工况，维护量大幅降低；
- 助力客户实现连续在线监测与降本增效，获得客户高度认可。
化工制药反应釜与储罐 · 音叉应用案例
项目背景
化工制药客户在反应釜与储罐环节，长期面临「介质腐蚀性强、工况复杂，仪表需耐腐蚀且防爆」的困扰，对音叉的稳定性与测量精度提出了更高要求。
解决方案
阿仪科技技术团队结合现场工况，为客户选配了适配的音叉，并完成选型、安装、调试与整定的一站式交付。
实施效果
- 测量精度与响应速度显著提升，数据稳定可靠；
- 仪表适应化工制药复杂工况，维护量大幅降低；
- 助力客户实现连续在线监测与降本增效，获得客户高度认可。
电力能源电厂锅炉与汽机 · 音叉应用案例
项目背景
电力能源客户在电厂锅炉与汽机环节，长期面临「高温高压工况下测量不稳定，维护停机成本高」的困扰，对音叉的稳定性与测量精度提出了更高要求。
解决方案
阿仪科技技术团队结合现场工况，为客户选配了适配的音叉，并完成选型、安装、调试与整定的一站式交付。
实施效果
- 测量精度与响应速度显著提升，数据稳定可靠；
- 仪表适应电力能源复杂工况，维护量大幅降低；
- 助力客户实现连续在线监测与降本增效，获得客户高度认可。
