Submersible Hydrostatic Level Transmitter 0.5-100m Range IP68 Protection 24VDC 4-20mA Output
This submersible hydrostatic level transmitter operates on the principle that liquid static pressure is directly proportional to height. Utilizing diffusion silicon or ceramic sensitive elements with piezoresistive effect, it converts static pressure into electrical signals. After temperature compensation and linear correction, it outputs standard 4-20mA DC current signals for industrial applications.
| Parameter | Specification |
|---|---|
| Measurement Range | 0.5 to 100m (user-selectable) |
| Maximum Overload | Twice the standard range |
| Accuracy Grade | 0.5% F*S |
| Long-term Stability | ±0.2% F*S/year |
| Power Supply Voltage | 24VDC |
| Output Signal | Two-wire 4 to 20mA DC / 0-10V DC / RS485 |
| Load Resistance | ≤500Ω |
| Operating Temperature | -10 to 70°C |
| Protection Grade | IP68 |
When submerged in liquid, the pressure on the sensor's surface is calculated as:
Where:
P: Pressure on transmitter's exposed surface
p: Density of measured liquid
g: Local gravitational acceleration
Po: Atmospheric pressure
H: Depth of transmitter in liquid
Liquid pressure enters the positive pressure chamber via stainless steel vent tube, while atmospheric pressure connects to the negative pressure chamber, canceling Po. The measured pressure p*g*H determines liquid level depth.
- High precision and stability with 0.5% F*S accuracy
- Easy installation - directly submersible into measurement medium
- Solid-state structure with no moving parts for high reliability
- Long service life and minimal maintenance requirements
- High-precision measurement from water to viscous substances
- Unaffected by foaming, sedimentation, or electrical properties
- Wide temperature compensation range (-10 to 70°C)
- IP68 protection grade for harsh environments
- Reverse polarity protection and overload current limiting
Widely used in petrochemical, metallurgy, power generation, pharmaceutical, water supply and drainage, and environmental protection systems.
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