音叉限位开关（停产，替代型号是41）
Technical Data
CompareDensity
| Measuring Principle | Vibration Density |
| Characteristic / Application | Liquiphant M Density with Density Computer FML621 Temperature and pressure measurement Modular housing concept Wide range of process connections |
| Supply / Communication | Transmitter power supply (MUS) |
| Ambient temperature | -50...70°C -50...60°C for hazardous applications |
| Process temperature | 0...80°C (validity of accuracy data) -50...0°C /80...150°C (with reduced technical data) |
| Process pressure | 0...25 bar >25...64 bar (with reduced technical data) |
| Wetted parts | 316L/C4 |
| Sensor length | Compact: 50.5 mm |
| Output | Pulse |
| Certificates / Approvals | ATEX, FM, CSA C/US, IEC Ex, TIIS, INMETRO, NEPSI |
| Specialities | Commissioning with ReadWin2000 |
| Components | Density Computer FML621 |
| Other approvals and certificates | SIL2/ SIL3 |
Point Level / Liquids
| Measuring Principle | Vibration Liquids |
| Characteristic / Application | Modular housing concept wide range of process connections Analogue and bus interfaces Extensive certificate range (e.g. Ex,WHG) compact, e.g. pipes |
| Specialities | Foamdetection Detekt a densitychange second line of defense |
| Supply / Communication | PROFIBUS PA 19...253V AC 10...55V DC-PNP 19...253V AC or 10...55V DC 8/16mA, 11...36V DC 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 option) |
| Main wetted parts | 316L, Alloy |
| Process connection | Thread: G3/4A, G1A, R3/4", R1, NPT3/4, NPT1 Flange: DN25...DN100, ASME 1"...4", JIS 25A...100A |
| Process connection hygienic | Tri-Clamp ISO2852 |
| Communication | PROFIBUS PA 19...253V AC 10...55V DC-PNP 19...253V AC or 10...55V DC 8/16mA, 11...36V DC NAMUR PFM |
| Certificates / Approvals | ATEX, FM, CSA C/US, IEC Ex, TIIS, INMETRO, NEPSI |
| Safety approvals | SIL2/ SIL3 |
| Design approvals | EN 10204-3.1 NACE MR0175, MR0103 ASME B31.3 AD2000 |
| Marine approval | GL/ ABS/ DNV |
| Options | Heavy duty stainless steel housing mainly for the oil and gas industry |
| Components | FTL325P/FTL375P Interface PFM FTL325N/FTL375N Interface NAMUR |
| Successor | Liquiphant FTL51B |
The Liquiphant FTL50 vibronic limit switch can be used in hazardous areas, has obtained various international approvals and is suitable for all industries. FTL50 achieves SIL2/SIL3 functional safety, and the second line of defense ensures the highest degree of safety and availability. The measured value is stable and unaffected by flow, turbulence, bubbles, foam, vibration, solids content or buildup.
Benefits
Can be used in safety systems requiring SIL2/SIL3 functional safety in accordance with IEC 61508/IEC 61511-1
Various process connections available
Various electronic insert types, such as NAMUR, relay, semiconductor thyristor and PFM signal output, for connection to various process control systems
PROFIBUS PA communication protocol also available
No calibration required: fast, economical device startup
No mechanically moving parts, no maintenance, no wear, long service life. Fork breakage monitoring ensures correct function
FDA-approved materials (PFA Edlon)
Application
Limit switch for all liquids
Process connection: thread, flange and hygienic process connections (clamp)
Temperature: -50 ~ +150°C (-58~ +302°F)
Pressure: -1~ +64 bar (-14.5~ +928 psi)
Sensor material: 316L, Alloy
International explosion protection approval, WHG overflow protection, SIL, marine approval
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Technical Documentation
Technical Specifications
Documents/Manuals/Software
Accessories/Spare Parts
Measuring Principle Video
Source:Endress+Hauserwebsite public information
Related Models
| Model | Name |
|---|---|
| FTL50-AGR2AA4G4A | 音叉限位开关（停产，替代型号是FTL41） |
| FTL50-AGR2AA4G5A | 音叉限位开关（停产，替代型号是FTL41） |
| FTL50-AGR2AA4G5A | 音叉限位开关（停产，替代型号是FTL41） |
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。
