../../images-webp/4cfc36ff7ea609b0334c5b2ee6f1a9d5.webp

E+H tuning fork level switch, FTL31-AA4U2AAWBJ

Industrial switch for sensing or control applications.

In Stock & ready to ship

Product Overview

Li ... FTL31 liquid limit switches are suitable for measurement in all industries, primarily the machinery industry.

Features

Liquiphant FTL31 liquid limit switches are suitable for overflow protection and pump dry running protection in cleaning, filtration systems, and cooling and lubrication containers.

Compact: - Smallest tuning fork sensor on the market. Safe: - Continuous self-monitoring. - Reliable switching action, unaffected by media properties. Simple: - No calibration or adjustment required. - Plug and play.

Liquiphant FTL31 liquid limit switches are suitable for measurement in all industries, primarily the machinery industry. Liquiphant can be used for overflow protection and pump dry running protection in cleaning, filtration systems, and cooling and lubrication containers.

Works based on tuning fork measurement principle, safe and reliable operation, wide range of applications Rugged and durable stainless steel housing (316L) for maximum durability External function testing via test magnet Uses LED Indicator Lights for On-Site Function Testing Compact design allows for easy installation and use in confined spaces Designed to meet the highest quality and environmental sustainability requirements. The self-monitoring Liquidant ensures safe switching even during power outages. Unaffected by changes in media characteristics, providing precise switching points Even in environments with changing media, no adjustment is required; this plug-and-play sensor is practically usable. Measurements are unaffected by conductivity, adhesion, disturbance, flow, or bubbles. No calibration required, no specific knowledge or tools (e.g., software) needed. Modular design provides different process temperatures and the widest variety of process connections and accessories on the market to meet every application requirement. No moving mechanical parts, maintenance-free.

Technical Specifications

°F ... 302 °F) prevention WHG

Measurement Principle	Liquid Tuning Fork
Features/Applications	Level switch for liquids and is used in Tanks, vessels, and pipes.
Power/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 ... 158 °F)
Process Absolute Pressure/Maximum Overpressure Limits	Vacuum ... 40 bar (Vacuum ... 580 psi)
Minimum Measured Medium Density	>>0.7 g/cm³ (>0.5 g/cm³ optional)
Contact Medium Components	316L
Process Connections	Threads: G1/2, G3/4, G1, MNPT1/2, MNPT3/4, MNPT1, R1/2, R3/4, R1
Outputs	AC/DC, DC-PNP
Certificates and Authentications	CSA C/US
Safety approvals	Overfill
Design approvals	EN 10204-3.1
Marine approval	ABS/ LR/ BV/ DNV
Optional	Adjustment switching delay Cleaned from oil+grease, PWIS free

Product Applications

Liquiphant FTL31 limit switches are used for liquid limit detection in tanks, containers, and pipelines.

They also provide overflow protection or pump dry-run protection in cleaning and filtration systems, as well as coolant tanks and lubricant tanks.

They are an ideal replacement for float switches or conductivity, capacitive, and optical sensor products.

Liquiphant FTL31 can be used in situations where conductivity, adhesion, disturbance, flow conditions, or bubbles render other measurement principles unsuitable.

The maximum process temperature for Liquiphant FTL31 is:

100 °C (212 °F)
150 °C (302 °F)

Do not use in hazardous areas.

In hygienic applications, Liquiphant FTL33 is recommended.

Instrument images are for reference only. In case of discrepancies, please refer to the text description. Products are supplied according to the model description. Please confirm the technical information before ordering.

Technical Specifications

Specification	Value
Brand	Endershaus
Category	Tuning Fork Level Switch
Output Method	AC/DC, DC-PNP
Process Connection	G1/2
Probe Length	38mm
Process Temperature (°C)	100
Operating Power Supply Voltage (V)	DC 24V

Share Article

Visit Store

Brand Name:	Endress+Hauser	Certification:	ISO9001,CE
Place of Origin:	China	Condition:	New
Warranty:	1 years	Customized design:	available

What are your strengths?

Ans. Lehiy specializes in industrial automation and control components, offering fast sourcing, stable quality, and competitive prices for global customers.

What is your estimated delivery time?

Ans. Most items ship within 3–7 days. Customized or rare models may take 10–30 working days.

What are your primary product offerings?

Ans. Our main products include PLCs, sensors, valves, solenoid valves, actuators, power modules, transmitters, and complete industrial automation solutions.

How can I get in touch with you?

Ans. You can reach us anytime via Email, WhatsApp, LinkedIn, or our contact page. Our sales engineers respond quickly and provide technical support when needed.

What are your payment terms?

Ans. Standard terms are 50% TT in advance and 50% balance before delivery. We also support Alibaba Trade Assurance and L/C for qualified orders.

Feel free to Ask questions

Related Products

E+H electrode CPS11D-7BA21 digital pH electrode

Endress+Hauser

Trusted partners

We have collaborated with many well-known enterprises, contributing to their success and establishing a strong reputation as a trusted partner in the industry.