Float Level Transmitter
Float Operated Level Transmitters are designed for continuous and reliable measurement of liquid levels in tanks containing corrosive or non-corrosive liquids. The system consists of a non-magnetic sealed stem with a series of reed switches and resistors, a magnetic float, mounting flange, and an electronic circuit housed in a weatherproof or flameproof enclosure.
As the liquid level rises or falls, the magnetic float moves along the stem, actuating reed switches and generating a proportional voltage signal. This is converted into a standard 4–20 mA output compatible with PLC, DCS, remote display units, or integral indicators. It is a proven and accurate solution for a wide variety of industrial applications.
Product Share on :Applications
- Storage and process tanks
- Water, diesel, oils & lube oils
- Chemical & petrochemical liquids
- Acids: Nitric Acid, 98% H₂SO₄, 33% HCL
- Critical inventory & pressurized vessels
- Interface level applications
- WTPs, STPs & ETPs
- Nuclear power plants
- Tank gauging systems for ships
Construction & Working
The transmitter features a sealed, non-magnetic stem equipped with reed switches and resistors, a float containing a permanently magnet, and a flange for mounting. The float moves with the liquid level, actuating reed switches that generate a proportional voltage. This signal is processed by the transmitter electronics to provide a 4–20 mA output. The design ensures accurate, stable, and repeatable measurement for a wide variety of industrial liquids.
Key Features
- Easy installation with compact design
- Factory calibrated – ready for installation
- Customized stem lengths up to 3 meters
- Optional HART or RS-485 MODBUS output
- Accurate and reliable performance
- Weatherproof or flameproof enclosures available
Technical Specifications
| Level Transmitter Type | Float Level Transmitter |
|---|---|
| Max. Stem Length | 0.5 to 3 meters |
| Measuring Range | Stem Length – (Top Dead Band + Bottom Dead Band) |
| Installation | Top |
| Resolution | ±10 mm (Standard), ±5 mm (Optional) |
| Enclosure | Cast Aluminium – Weatherproof / Flameproof |
| Cable Entry | PG11 or ½” NPT |
| Wetted Parts | SS304 / SS316 / SS316L / PP / PVDF |
| Float Options | SS316 (Ø40, Ø52), SS316L (Ø41), PP (Ø75), PVDF (Ø65) |
| Liquid Specific Gravity | 0.8 to 1.2 (depending on float size) |
| Process Connection | Screwed / Flanged / Triclover Ferrule |
| Power Supply | 24 VDC |
| Output | 4–20 mA (2-wire) / 4–20 mA + HART / RS-485 MODBUS |
| Max. Load | 400 Ohms |
| Max. Temperature | 70°C (PP), 100°C (PVDF), 150°C (SS) |
| Max. Test Pressure | 2 Bar (PP/PVDF), 10 Bar (SS) |
Model Identification
- FLT – Base Model
- 1. Stem Length: In mm
- 2. Resolution: 10 = ±10 mm, 5 = ±5 mm
- 3. Enclosure: W – Weatherproof, F – Flameproof
- 4. Wetted Parts: 4 – SS304, 6 – SS316, L – SS316L, P – PP, D – PVDF, O – Other
- 5. Process Connection Size: D – 2”, E – 2½”, F – 3”, O – Other
- 6. Process Connection Type: 1 – ASME 150#, 2 – Table D, 3 – BSP(M), 4 – Triclover, 0 – Other
- 7. Process Connection Material: H – CS, I – SS304, J – SS316, K – SS316L, L – PP Cladding, M – PVDF, O – Other
- 8. Output: 1 – 4–20 mA, 2 – 4–20 mA with HART, 3 – RS-485 MODBUS RTU
