液位开关
Technical Data
ComparePoint Level / Liquids
| Measuring Principle | Vibration Liquids |
| Characteristic / Application | Level switch for liquids and is used in tanks, vessels and pipes. |
| Supply / Communication | 20 ... 253V AC/DC, 2-wire 10 ... 30V DC-PNP 3-wire |
| Ambient temperature | -40 °C ... 70 °C (-40 °F ... 158 °F) |
| Process temperature | -40 °C ... 150 °C (-40 °F ... 302 °F) |
| Process pressure / max. overpressure limit | Vacuum ... 40 bar (Vacuum ... 580 psi) |
| Min. density of medium | >0,7g/cm³ (>0,5g/cm³ optional) |
| Main wetted parts | 316L |
| Process connection | Threads: G1/2, G3/4, G1, MNPT1/2, MNPT3/4, MNPT1, R1/2, R3/4, R1 |
| Communication | AC/DC, DC-PNP |
| Certificates / Approvals | CSA C/US, EAC |
| Safety approvals | Overfill protection WHG Leakage |
| Design approvals | EN 10204-3.1 |
| Marine approval | ABS/ LR/ BV/ DNV |
| Options | Adjustment switching delay Cleaned from oil+grease, PWIS free |
If a hygienic connection with clamp is required, select the FTL33.
The Liquiphant FTL31 liquid point level switch is suitable for measurement in all industries, mainly in the mechanical engineering industry. The Liquiphant can be used for overflow protection and pump dry-run protection in cleaning and filter systems as well as in cooling and lubricating vessels.
Compact:
- The smallest vibronic sensor on the market
Safe:
- Continuous self-monitoring
- Reliable switching unaffected by the properties of the medium
Simple:
- No calibration or adjustment required
- Plug and play
Benefits
Designed to meet the highest quality and environmental sustainability requirements. The self-monitoring Liquiphant switches safely even in the event of a power failure.
Provides precise switch points unaffected by changes in medium properties
Even when the medium changes, plug-and-play sensors can be used without adjustment. The measurement is unaffected by conductivity, buildup, turbulence, flow or bubbles
No calibration, specific knowledge or tools required (e.g. software)
Rugged stainless steel (316L) with the highest durability - no mechanical moving parts, maintenance-free
The modular design offers different process temperatures and the widest range of process connections and accessories on the market, meeting every application requirement
No mechanical moving parts, maintenance-free
Application areas
The FTL31 is a reliable point level switch with a compact design and stainless steel housing. It is suitable for general industrial applications in all industries, for example OEM equipment with limited installation space.
Process connection: thread
Temperature: -40...+150 °C (-40...+302 °F)
Pressure: -1...+40 bar (-14.5...580 psi)
Surface finish: 3.2 µm
Certifications: WHG overflow protection and leak detection, CSA C/US, 3.1 material certificate, marine approvals, final inspection report
Replacement for FTL20/FTL260 and FTL31:
FTL20-0010 FTL31-AA1U2AAWBJ
FTL20-001B FTL31-AA1U3AAWBJ
FTL20-0020 FTL31-AA4U2AAWBJ
FTL20-0025 FTL31-AA4M2AAWBJ
FTL20-002B FTL31-AA4U3AAWBJ
FTL20-002D FTL31-AA4M3AAWBJ
FTL20-0110 FTL31-AA1U2AAW5J
FTL20-011B FTL31-AA1U3AAW5J
FTL20-0120 FTL31-AA4U2AAW5J
FTL20-0125 FTL31-AA4M2AAW5J
FTL20-012B FTL31-AA4U3AAW5J
FTL20-012D FTL31-AA4M3AAW5J
FTL20-061B FTL31-AA1U3AAWDJ
FTL20-062B FTL31-AA4U3AAWDJ
FTL20-062D FTL31-AA4M3AAWDJ
FTL260-0010 FTL31-AA1U2BAWSJ
FTL31-AA1U3BAWSJ
FTL260-0020 FTL31-AA4U2BAWSJ
FTL31-AA4U3BAWSJ
FTL260-1010 FTL31-AA1U2BAWSJ
FTL31-AA1U3BAWSJ
FTL260-1020 FTL31-AA4U2BAWSJ
FTL31-AA4U3BAWSJ
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Technical information
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Measuring principle video
Source: public information from the Endress+Hauser website
Related Models
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。
