Submersible Level Transmitters

-- Steady & Reliable Manufacturer --

Brief Description

Submersible Level Transmitters, often called level probes, are highly reliable instruments used to measure liquid levels in deep tanks, sumps, wells, and reservoirs by calculating the hydrostatic pressure exerted by the fluid column above the sensor.

In-depth Overview

These transmitters feature a sealed, rugged housing (typically Stainless Steel 316L) and are submerged directly into the liquid. They use a vented cable connection—which is essential—to reference the atmospheric pressure, ensuring the reading accurately reflects the level regardless of barometric pressure fluctuations. The core technology often involves a piezoresistive silicon chip that converts the pressure into a standard electrical output (4-20mA or digital), providing continuous, accurate level data to the control system.

Specification

Parameter	Details
Measurement Range	0 to 200 meters H$_{2}O (custom ranges available)\\\\\Output Signal\\\$4-20$mA, Voltage, or SDI-12\\\\\Accuracy\\\\pm 0.25%$ to ±0.5% Full Scale
Housing Material	Stainless Steel 316L (standard), Titanium (optional)
Cable	Vented Polyurethane or FEP (Teflon) jacketed cable
Ingress Protection	IP68 (fully submersible)
Compensation	Automatic Temperature Compensation
Connection	Suspension cable with integrated vent tube

Applications

Groundwater and Well Monitoring: Measuring static and dynamic water levels in boreholes and observation wells.
Wastewater Treatment: Level control in wet wells, lift stations, and aeration basins.
Large Storage Tanks: Continuous level inventory control in deep oil, chemical, or water storage tanks.
Dams and Reservoirs: Monitoring critical water resource levels for management and safety purposes.

Key Advantages

Simple Installation: Just lower the probe to the bottom; no complex external mounting or moving parts.
High Accuracy and Reliability: Hydrostatic measurement is highly repeatable and independent of tank shape.
Robust and Durable: IP68 rating and corrosion-resistant materials ensure longevity in harsh, submerged conditions.
Built-in Protection: Integrated lightning and surge protection for field installation.

Payment and Shipping

We accept major international payment methods including T/T (Wire Transfer) and irrevocable Letter of Credit (L/C). Due to the custom cable lengths required for level applications, lead times may vary. We ensure all probes are thoroughly sealed and tested before shipping. We use robust wooden or heavy-duty cardboard cylinders for shipping to prevent kinking or damage to the sensitive vented cable.

Frequently Asked Questions

Q: Why is the vented cable so important for level measurement?
A: The vent tube connects the sensor's reference side to the atmosphere. Since the pressure reading in an open tank includes atmospheric pressure, venting compensates for changes in barometric pressure, ensuring the output only reflects the actual liquid height.

Q: Can this probe be used for corrosive liquids?
A: Yes, provided the housing and cable jacket material are chemically compatible. For highly corrosive media (like strong acids), we recommend upgrading from 316L SS to Titanium or specialized alloys like Hastelloy.

Q: How do I protect the probe from lightning strikes?
A: Our transmitters include integrated surge protection, but for external protection, we recommend installing a dedicated lightning arrestor/barrier at the junction box where the cable transitions above ground.

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Submersible Level Transmitters Manufacturers

Wuxi Huihua Special Instrumentation Co., Ltd. was established in December 2001, the registered capital is 5 million yuan, the existing staff of more than 50 small and medium-sized joint-stock enterprises.
The company specialises in the production of various types of special instruments, alternative to the localisation of imported instruments.To seismic pressure gauge, seismic electric contact pressure gauge, stainless steel pressure gauge, diaphragm corrosion-resistant pressure gauge, marine pressure gauge and other series as the main products. On the basis of field instruments, we have developed various kinds of pressure transmitters, pressure controllers, digital pressure gauges and so on. There are more than 30 series and 3000 specifications. Products are widely used in petroleum, chemical, paper, metallurgy, mining, chemical fibre, electric power, food, environmental protection, rubber and plastic, hydraulics and many other industries, and more than 2,000 domestic customers to establish a friendly relationship with the national large and medium-sized enterprises to establish a good partnership, won the majority of users praise, and set up a corporate brand image.