Hydrostatic Level Transmitter
Hydrostatic Level Transmitters are designed for continuous hydrostatic level measurement in ventilated tanks, wells, reservoirs and sumps. The transmitter works on the principle of sensing hydrostatic pressure exerted by the liquid column and converting it into a linear 4–20 mA output. Measurement remains unaffected by electrical medium properties or foam formation.
The system comprises a piezo-resistive pressure sensor integrated with signal evaluation electronics. The probe construction is rugged, compact, corrosion resistant and suitable for narrow bore installations. With IP68 protection and customized lengths up to 200 meters, it delivers long-term reliable performance in harsh environments.
Product Share on :Applications
- Water treatment plants
- Reservoirs & overhead tanks
- Sumps and bore wells
- Groundwater level monitoring
- Dam water level measurement
- Marine & shipboard tank level monitoring
- General continuous liquid level monitoring
Construction & Working
The transmitter consists of a piezo-resistive pressure sensor and built-in evaluation electronics, all enclosed within a durable probe. The hydrostatic pressure created by the liquid column is sensed by the pressure element, which converts it into a proportional 4–20 mA current output. This method ensures accurate and stable measurement regardless of foam, vapors, or changes in electrical properties of the medium.
Key Features
- Compact, rugged & corrosion-resistant construction
- Easy to install, handle, and transport
- Customized lengths available up to 200 meters
- Suitable for tanks and wells with small bore diameters
- Probe designed with IP68 ingress protection
Technical Specifications
| Level Transmitter Type | Hydrostatic Level Transmitter |
|---|---|
| Measuring Length | 0.5 to 200 meters |
| Enclosure | Aluminium Alloy – Weatherproof |
| Process Connection | Screwed / Flanged |
| Power Supply | 16 – 28 VDC |
| Output | 4–20 mA (2-wire) / 4–20 mA + HART (2-wire) / RS-485 MODBUS |
| Accuracy | 0.5% FS |
| Probe Dia & MOC | 27 mm Ø – SS316 |
| Max. Temperature | -40°C to +70°C |
Model Identification
- HLT – Base Model
- 1. Measuring Length: in mm
- 2. Probe MOC: S – SS316, O – Other
- 3. Termination: W – Open Ended Cable, A – Cast Aluminium Enclosure, O – Other
- 4. Process Connection MOC: W – Without, 4 – SS304, 6 – SS316
- 5. Process Connection Size: D – 1”, E – 1½”, O – Other
- 6. Process Connection Type: 1 – ASME 150# Flange, 2 – BSP(M) Screwed, 0 – Other
- 7. Output: T – 4–20 mA, H – 4–20 mA with HART, R – RS-485 MODBUS RTU
