logo

100% genuine products & Actual product photos
Sales & Support
Request A Quote - Email
Select Language
English
Français
Deutsch
Italiano
Русский
Español
Português
Nederlandse
ελληνικά
日本語
한국
Home
Products
Videos
About Us
Factory Tour
Quality Control
Contact Us
Request A Quote
News
Home ProductsE&H Instruments

Endress+Hauser FTL51B-29FJ20 | Liquiphant M FTL51B Vib. Fork Level Switch, 316L, 3/4" NPT, SPST NO/NC, 20–253V AC/DC

All Products
Allen Bradley PLC Controllers (103)
Pepperl Fuchs Safety Barrier (139)
MTL Safety Barrier (69)
E&H Instruments (116)
Rosemount PH Sensors (60)
Bently Nevada Proximity Probe (48)
IFM Sensors (35)
ASCO Valves (19)
Yokogawa Instruments (150)
HONEYWELL Transmitter (27)
SICK Instruments (44)
Festo Cylinder (78)
EMERSON TREX Device Communicator (3)
SIEMENS PLC Products (101)
SMC Instruments (16)
ABB Positioner (59)
WAGO Connectors (31)
VEGA Instruments (228)
I'm Online Chat Now
Certification
China Achievers Automation Limited certification
China Achievers Automation Limited certification
"ACH has proven to be a reliable partner. Their products are genuine and high-quality, with competitive prices and on-time delivery. We trust them as our long-term supplier in automation."

—— Mohammed Al-Farsi, Procurement

"For us, cost efficiency and authenticity are key. ACH helps reduce expenses while ensuring reliable quality and timely supply, making them a strong partner in our operations."

—— Procurement Manager

"For us, cost efficiency and authenticity are key. ACH helps reduce expenses while ensuring reliable quality and timely supply, making them a strong partner in our operations."

—— Supply Chain Director

"ACH offers quick response, flexible solutions, and fair pricing. The products are always genuine and reliable, and their friendly support makes cooperation smooth."

—— Operations Manager

"ACH provides genuine products with stable quality and fair pricing. Their fast response and reliable delivery give us confidence to continue working with them."

—— Engineering Manager

"We value ACH for their consistent quality and competitive pricing. Deliveries are always reliable, and their professional support makes procurement much easier for our team."

—— Procurement Head

Endress+Hauser FTL51B-29FJ20 | Liquiphant M FTL51B Vib. Fork Level Switch, 316L, 3/4" NPT, SPST NO/NC, 20–253V AC/DC

Endress+Hauser FTL51B-29FJ20 | Liquiphant M FTL51B Vib. Fork Level Switch, 316L, 3/4" NPT, SPST NO/NC, 20–253V AC/DC
Endress+Hauser FTL51B-29FJ20 | Liquiphant M FTL51B Vib. Fork Level Switch, 316L, 3/4" NPT, SPST NO/NC, 20–253V AC/DC Endress+Hauser FTL51B-29FJ20 | Liquiphant M FTL51B Vib. Fork Level Switch, 316L, 3/4" NPT, SPST NO/NC, 20–253V AC/DC Endress+Hauser FTL51B-29FJ20 | Liquiphant M FTL51B Vib. Fork Level Switch, 316L, 3/4" NPT, SPST NO/NC, 20–253V AC/DC

Large Image :  Endress+Hauser FTL51B-29FJ20 | Liquiphant M FTL51B Vib. Fork Level Switch, 316L, 3/4" NPT, SPST NO/NC, 20–253V AC/DC Get Best Price

Product Details:
Place of Origin: DE
Brand Name: Endress+Hauser
Certification: ATEX
Model Number: FTL51B-29FJ20
Document: ACH-AB-P+F-E+H-IFM-ASCO-YOK...WA.pdf
Payment & Shipping Terms:
Minimum Order Quantity: 1
Price: Negotiable
Packaging Details: carton
Delivery Time: Negotiable
Payment Terms: T/T,XT,ALIPAY
Supply Ability: 100pcs per month
Contact Now
Detailed Product Description
Power Supply: 1 Ambient Temperature: -
Electrical Rating: G Certifications: S
Highlight:

Liquiphant M FTL51B level switch 316L

,

Vibrating fork level switch 3/4 NPT

,

Level switch SPST NO/NC 20-253V

Endress+Hauser FTL51B-29FJ20 | Liquiphant M FTL51B Vib. Fork Level Switch, 316L, 3/4" NPT, SPST NO/NC, 20–253V AC/DC
Endress+Hauser FTL51B-29FJ20 Liquiphant M compact vibrating fork level switch — 316L wetted parts, 3/4" NPT male process connection, SPST relay NO/NC output, 20–253 V AC/DC supply. For liquids, density ≥ 0.5 g/cm³, no calibration required.

Product Overview

The Endress+Hauser FTL51B-29FJ20​ is a compact Liquiphant M series vibrating fork (tuning fork) level switch​ for point-level detection of liquids in tanks, pipes, and sumps. The fork is made of 316L stainless steel​ with a 3/4" NPT male process connection, suitable for hygienic and industrial applications. It operates on the piezoelectric-driven resonance principle — the fork vibrates at its natural frequency (~1300 Hz) and stops vibrating when covered by liquid, triggering the SPST relay output (NO/NC, DPDT contact block style — option-dependent; -29FJ20 typically denotes 20–253 V AC/DC supply with relay output). No calibration or density adjustment is required; it ignores foam, conductivity, dielectric constant, and buildup. Suitable for overfill alarm, dry-run protection, and pump control in water/wastewater, chemical, and food & beverage industries.

Technical Specifications (Electrical & Output)

Parameter
Specification
Order Code​
FTL51B-29FJ20​ (Liquiphant M — Basic Version)
Series​
Endress+Hauser Liquiphant M (FTL51B Compact)
Measured Medium​
Liquids (conductive & non-conductive), min. density ≥ 0.5 g/cm³​
Switching Output​
1 × Changeover Contact (SPDT Relay / Dry Contact)​ — NO/NC configurable wiring
Supply Voltage​
20 … 253 V AC (50/60 Hz) / 20 … 253 V DC​ (Code "29" = universal AC/DC)
Contact Rating​
Max. 250 V AC / 3 A resistive (AC-15: 240 V / 3 A; DC-13: 24 V / 2 A)
Switching Delay​
< 1 s (typical)
Fail-Safe Mode​
Output de-energizes on power loss (switch to safe state — configurable via wiring)
Power Consumption​
≤ 2 VA

Technical Specifications (Mechanical & Process)

Parameter
Specification
Fork / Wetted Parts Material​
316L Stainless Steel (1.4404 / AISI 316L)​ — electropolished option per variant
Process Connection​
3/4" NPT Male Thread​ (integral — Code "J20" typical = 3/4" NPT)
Housing Material​
Die-cast Aluminum, polyester powder-coated (IP66/67, NEMA 4X)
Cable Entry​
1/2" NPT Female​ (threaded — blanking plug supplied; gland ordered separately)
Fork Length (Immersion)​
Fork prongs ≈ 40 mm (standard compact design — no extension)
Ambient Temperature​
-40 … +70 °C​
Process Temperature​
-40 … +150 °C​
Process Pressure​
-1 … +40 bar (-0.1 … +4.0 MPa)​
Degree of Protection​
IP66 / IP67​ (EN 60529), NEMA 4X
Approvals (Typical)​
CE, cCSAus General Purpose; optionally ATEX / IECEx Ex d / Ex ia — verify per suffix
Weight (Approx.)​
~1.3 kg

Key Features

  • No Calibration Required:​ Piezo-driven fork — immune to changing media properties (dielectric, conductivity, foam, viscosity within limits).
  • Universal AC/DC Supply (20–253 V):​ Single part covers both AC and DC panel supplies — simplifies spare stocking.
  • Compact Fork Design:​ Minimal intrusion into tank — suitable for small vessels, pump pits, and pipe tees.
  • Self-Monitoring Electronics:​ Continuous diagnostic check of fork oscillation — fails to safe state on fault (e.g. fork fouling beyond limits or electronics failure).
  • Robust 316L Construction:​ Corrosion-resistant wetted parts for water, wastewater, chemicals, and CIP/SIP-compatible processes.

Typical Applications

  • Pump Protection:​ Dry-run prevention in lift stations, booster sets, and chemical dosing skids.
  • Overfill / Low-Level Alarm:​ Tank high-level alert in chemical storage, food ingredient tanks, and IBC totes.
  • Sumps & Wet Wells:​ Sewage/storm-water wet well level switching — unaffected by turbulence or foam.
  • Process Skid Integration:​ Point-level detection in modular process units where compactness and no-adjustment operation are valued.
FTL51B is the compact (basic) Liquiphant M. For hygienic clamp/tri-clamp or larger fork extensions, see FTL50 / FTL51. The suffix "-29FJ20" typically decodes as: 29 = universal 20–253V AC/DC supply with relay output; F = housing/electronics version; J20 = 3/4" NPT male process connection. Exact option letter mapping may vary slightly by region — always cross-check the Endress+Hauser certificate of conformity / order confirmation for approval details (Ex / WHG / SIL). Many FTL51B variants are SIL 2 / SIL 3 capable per IEC 61508.

Endress+Hauser FTL51B-29FJ20 | Liquiphant M FTL51B Vib. Fork Level Switch, 316L, 3/4" NPT, SPST NO/NC, 20–253V AC/DC 0

More Products

Pepperl Fuchs Safety Barrier

Allen Bradley PLC Controllers

SICK Instruments 

Festo Cylinder 

IFM Sensors 

About ACH

Founded in 2012, ACH is a top-tier distributor of industrial automation products, supplying genuine devices from leading brands like ABB, P+F, E&H, AB, MTL  to emerging markets worldwide. Our mission is to provide 100% Genuine products at the most competitive prices, helping customers reduce costs and strengthen their market position.

ACH industrial automation products
Frequently Ask & Questions
Are preferential prices available?

Long-term brand partners can get competitive product prices. At the same time, ACH controls the profit per order to 5%, providing the most competitive prices.

Are the Products Genuine OEM Units?

Yes, all products from ACH are certified genuine OEM units. We acquire our inventory through official OEM channels and trusted third-party suppliers, ensuring every item is authentic and reliable.

How will you arrange shipment?

We'll handle the shipping for you. Through our partnerships, we can secure competitive rates with major carriers like FedEx, DHL, TNT, and UPS, ensuring a smooth and cost-effective delivery.

What is the warranty of goods?

One-year Warranty.

How long is the logistics cycle of the product?

Products are divided into spot and futures, and the delivery period of different brands of products is also different. For details, please contact the ACH business manager.

Ratings & Review

Overall Rating

5.0
Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings
5 stars
100%
4 stars
0%
3 stars
0%
2 stars
0%
1 stars
0%

All Reviews

H
Hamza Ali
Pakistan Jun 19.2026
Helpful (1)
This gel-type Memosens pH electrode provides stable 0–14 pH measurement with Pg 13.5 glass for industrial water and wastewater monitoring.
T
Tan Siew Ling
Malaysia May 24.2026
Helpful (1)
Great quality, fast shipping, works perfectly!
S
Siti Aisyah
Malaysia May 9.2026
Helpful (1)
This Endress+Hauser pressure transmitter works perfectly, very reliable!
Tag:

e&h instruments,

e and h flow meter,

e&h flow meter

Contact Details
Achievers Automation Limited

Contact Person: sales2

Send your inquiry directly to us
About Us
Pepperl Fuchs Safety Barrier
Allen Bradley PLC Controllers
IFM Sensors
Contact Us
Privacy Policy | China Good Quality Allen Bradley PLC Controllers Supplier. © 2025 - 2026 Achievers Automation Limited. All Rights Reserved.