Submersible level gauge
Commonly Measured Media
Scenarios of long – term contact with water bodies such as rivers, oceans, and wells
Product Overview
This transmitter uses a high-performance diffused silicon piezoresistive pressure sensor as the measuring element. Equipped with highly reliable amplification processing circuits and precise temperature compensation, it converts the gauge pressure or absolute pressure of the measured medium into standard voltage or current signals. These signals can be directly and conveniently connected to computer interface cards, control instruments, intelligent meters, PLCs and other equipment.
The product features a compact structure and easy installation. Once submerged in liquid, it can directly measure the liquid level height from the bottom of the transmitter to the liquid surface. This product series is widely used for liquid level measurement and control in industrial sites, urban water supply and drainage, petroleum, chemical industry, power plants, hydrological monitoring, reservoir dams, water conservancy and hydropower projects and other fields.
Product Features
Imported silicon wafer diffused silicon sensing core.
Cable connection design, directly submersible on site for easy installation.
The amplifier circuit uses integrated chips.
Inclined pressure guiding hole, impact resistant.
IP68 protection grade, capable of long-term underwater immersion.
Laser marking for full product traceability.
Working Principle
The pressure formula received by the sensor facing the liquid surface is as follows:
P = ρg h + Po
Where:
P: Pressure borne by the sensor facing the liquid surface (hereinafter referred to simply as pressure for easier understanding)
ρ: Density of the measured liquid
g: Gravitational acceleration (set to 9.8015 during commissioning)
Po: Atmospheric pressure above the liquid surface
h: Submersion depth of the sensor in liquid
Selection Parameters
| Characteristic | Parameter |
| Measuring medium | Liquid (compatible with contacting materials) |
| Overall material | 316L stainless steel diaphragm, 304 stainless steel housing, nitrile rubber sealing ring, polyurethane cable, etc. |
| Measuring range | 0-500m |
| Comprehensive accuracy | 0.2%F.S (other accuracies can be customized) |
| Overload capacity | 200% |
| Response time | 8ms (rising to 90% of Full Scale (FS)) |
| Medium temperature | -25 to 60℃ (-40℃ can be customized) |
| Ambient temperature | -40~60°C |
| Power supply voltage | DC12 – 32V (24V as default) |
| Output signal | 4 – 20MA two – wire, 0 – 5V three – wire, 1 – 5V three – wire, 0 – 10V three – wire, RS485 |
| Stability performance | ±0.2%F.S per year |
| Sealing grade | IP68 |
| Process connection | Submersible type (immersed in the liquid to be measured) |
| Electrical interface | Connected by a waterproof nut and a five – core air – conducting cable |
| Storage temperature | -40~125℃ |
| Zero – point temperature drift | ±0.2%F.S |
| Sensitivity temperature drift | ±0.2%F.S |
| Mechanical vibration | 20g（20~5000Hz） |
| Impact | 100g（11ms） |
| Insulation | 100mΩ/DC 250V |
| Medium compatibility | Various media compatible with stainless steel |
Overall dimensions
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