1. Introduction
The FRD Sensor FD3051LD Remote Flange Liquid Level Transmitter is an intelligent level measurement instrument designed for challenging industrial process applications.
The FD3051LD adopts a remote flange structure, which transfers process pressure through a diaphragm seal and capillary system, preventing the measured medium from directly entering the sensing element.
Compared with traditional level measurement methods, the FD3051LD effectively reduces problems caused by clogged impulse lines, solidification, crystallization, and difficult maintenance, making it especially suitable for high-temperature, high-viscosity, corrosive, and complex process media.
The FD3051LD is widely used in petrochemical, power generation, metallurgy, pharmaceutical, food processing, water treatment, and new energy industries, providing stable and reliable liquid level measurement solutions for storage tanks, reactors, and process equipment.
2. Why Choose This Model?
Stable liquid level measurement is essential for ensuring production safety, improving process control, and reducing maintenance costs.
In practical industrial applications, customers often face challenges such as:
- Impulse line blockage caused by high-viscosity media
- Measurement instability under high-temperature conditions
- Corrosion damage from aggressive process media
- Frequent maintenance caused by crystallization or solidification
- Measurement errors caused by complex installation conditions
The FRD Sensor FD3051LD Remote Flange Liquid Level Transmitter is designed to solve these practical challenges.
1. Remote Flange Design Reduces Blockage Risk
Traditional differential pressure level measurement may rely on impulse lines, which can become blocked when measuring viscous or crystallizing media.
The FD3051LD uses a remote flange diaphragm seal design, improving measurement reliability in demanding process conditions.
2. Suitable for Complex Process Media
Different industries involve different types of process media.
The FD3051LD is suitable for applications involving:
- High-viscosity liquids
- Corrosive media
- High-temperature processes
- Crystallizing materials
Helping customers reduce maintenance frequency and improve production continuity.
3. Stable Level Measurement Performance
Temperature changes, medium characteristics, and environmental conditions may affect level measurement accuracy.
The FD3051LD combines reliable sensing technology and intelligent signal processing to provide stable measurement data for industrial control systems.
4. Flexible Installation Adaptation
Different tanks and process equipment require different installation solutions.
The FD3051LD supports various remote flange configurations and process connections, allowing flexible adaptation to different industrial applications.
5. Reduce Maintenance Costs and Improve Efficiency
Frequent instrument maintenance increases operating costs and may affect production efficiency.
Through optimized measurement structure, the FD3051LD helps reduce common problems such as blockage and maintenance difficulty, providing a more economical and reliable level measurement solution.
3. Model Comparison Table
| Key Selection Factor |
FRD Sensor FD3051LD |
WIKA DPT-20 + Remote Diaphragm Seals |
Endress+Hauser Deltabar FMD78 |
| Product Type |
Remote Flange Liquid Level Transmitter |
Differential Pressure Transmitter + Remote Diaphragm Seals |
Differential Pressure / Level Transmitter with Two Diaphragm Seals |
| Measurement Range |
0–0.5 mH₂O ～ 10 mH₂O |
−10…+10 mbar to −16…+16 bar |
100 mbar–40 bar |
| Accuracy |
±0.25%FS / ±0.5%FS |
< ±0.065% of span |
±0.075% + diaphragm seal influence |
| Process Medium |
Liquids, gases, or steam |
Liquids, gases and other process media; configuration dependent |
Liquids, vapors, gases and dusts |
| Output Signal |
4–20 mA + HART / 1–5 V DC / RS485 |
4–20 mA / HART / FOUNDATION Fieldbus / PROFIBUS PA |
4–20 mA HART / PROFIBUS PA / FOUNDATION Fieldbus |
| Ambient Temperature |
−20°C to +80°C |
Configuration dependent |
−50°C to +85°C |
| Process Temperature |
−40°C to +200°C; 30°C to +300°C optional |
Configuration dependent; dependent on diaphragm seal and fill fluid |
Up to −70°C to +400°C |
| Long-Term Stability |
0.1%FS / year |
<0.065% * TD / year |
0.08% URL / year |
| Remote Diaphragm Seal |
Supported |
Available with mounted diaphragm seals |
Two capillary diaphragm seals |
| Electrical Connection |
M20*1.5(F), special customization available |
Configuration dependent |
Configuration dependent |
| Protection / Certification |
IP65; Ex ia I CT6 Ga / Ex d II CT6 Gb / Ex tD A21 IP66 T80°C |
Intrinsic safety / flameproof options available |
ATEX, FM, CSA, IECEx and other approvals |
| OEM / ODM |
Supported |
Standard product system |
Standard product system |
| Customization |
Special range, connection and structural customization available |
Mainly standard configuration |
Mainly standard configuration |
| Batch Supply |
Supported |
Global supply system |
Global supply system |
| OEM Cooperation Value |
Flexible customization + direct manufacturer support |
Standardized international product |
Standardized international product |
Products Parameters
| Range |
0-0.5m ~ 10mH₂O (see the selection table for details) |
| Accuracy |
0.25%FS, 0.5%FS |
| Output Signal |
4～20mA with HART, 1V ~ 5V DC, RS485 protocol |
| Process Medium |
Liquids, gases, or steam |
| Power Supply |
(12～32)VDC (24VDC recommended) |
| Ambient Temperature |
-20～80℃ |
| Medium temperature |
-40℃ ~ 200℃, 30℃ ~ 300℃ (optional) |
| Long-term Stability |
0.1% F.S / year |
| Electronic Connection |
M20*1.5(F), special customization available |
| Protection Class |
IP65 |
| Explosion-proof Grade |
Exia 1l CT6 Ga,Exd ll CT6 Gb,ExtD A21 IP66 T80℃ |
| Products Warranty |
12 moths |
4. FRD Sensor FD3051LD OEM & ODM Customization Services
FRD Sensor provides professional OEM & ODM customization services for the FD3051LD Remote Flange Liquid Level Transmitter, helping customers develop suitable level measurement solutions for different industrial applications.
Different process conditions may require customized flange structures, connection methods, materials, and installation designs.
FRD Sensor provides customization options including:
- Measurement range customization
- Flange specification customization
- Capillary length customization
- Process connection customization
- Wetted material selection
- Output signal configuration
- Explosion-proof configuration
- Product appearance and nameplate customization
- Packaging customization
From technical communication, product design, sample testing, to mass production, FRD Sensor provides complete customization support.
Through OEM & ODM services, FRD Sensor helps global customers solve various liquid level measurement challenges in complex industrial environments.
5. FRD Sensor FD3051LD Remote Flange Liquid Level Transmitter Measurement Accuracy Troubleshooting Guide
When the FRD Sensor FD3051LD Remote Flange Liquid Level Transmitter shows abnormal level readings, unstable output, or measurement deviation, users can follow the troubleshooting steps below.
Step 1: Check Process Connection
Confirm whether the flange connection is properly installed.
Check:
- Leakage points
- Installation condition
- Sealing performance
Step 2: Check Process Medium Condition
Changes in process media may affect pressure transmission.
Pay attention to:
- Solidification
- Crystallization
- Viscosity changes
Step 3: Check Capillary System
The remote flange system relies on capillaries for pressure transmission.
Inspect:
- Capillary damage
- External pressure impact
- Abnormal deformation
Step 4: Check Zero Point and Configuration
If the output has a constant deviation, verify:
- Zero setting
- Range configuration
- Control system parameters
Step 5: Check Power Supply and Signal Connection
Confirm:
- Stable power supply
- Correct wiring
- Proper communication settings
6. Application Scenarios
7. Product Drawing
8. Product Certifications
9. Conclusion
The FRD Sensor FD3051LD Remote Flange Liquid Level Transmitter is a reliable level measurement solution designed for complex industrial applications.
With a remote flange diaphragm seal structure and intelligent measurement technology, the FD3051LD effectively addresses measurement challenges caused by high temperature, high viscosity, corrosive media, and crystallization.
Featuring stable performance, flexible configuration, and OEM & ODM customization capability, the FD3051LD is widely used in petrochemical, power generation, pharmaceutical, new energy, water treatment, and process industries.
For customers seeking a stable liquid level measurement solution with reduced maintenance requirements and strong adaptability to challenging conditions, the FRD Sensor FD3051LD provides a reliable and efficient choice.
