Submersible Liquid Level Transmitter ND101 | Hydrostatic Level Sensor

Brand：NOIKE-AH
Model：ND101

Specification

Product Description

The Submersible Liquid Level Transmitter ND101 is designed for accurate and reliable hydrostatic liquid level measurement in industrial applications. It utilizes high-stability imported sensor chips and a high-precision intelligent transmitter processing circuit, combined with precision digital circuit technology and nonlinear correction technology to deliver stable measurement performance.

The transmitter features a waterproof and gas-conducting cable with an integrated vent tube, allowing long-term immersion while maintaining accurate pressure compensation. Its integrated structure and standardized output signals simplify installation and integration into automatic control systems.

Designed with a compact two-wire configuration, the ND101 is lightweight, easy to install, and suitable for continuous liquid level measurement in petroleum, chemical processing, power plants, municipal water supply, wastewater treatment, and hydrological monitoring applications.

Product Features

High-stability imported sensor chip for reliable measurement
Precision digital circuit and nonlinear correction technology
Integrated structure with a wide measuring range
Multiple output signal options for different control systems
Laser trimming compensation for zero point and temperature performance
Reverse polarity protection and current limiting protection
Resistant to lightning strikes and electrical shock
Compact two-wire design for easy installation
IP68 protection for long-term submerged operation

Applications

Industries

Petroleum
Chemical Industry
Power Plants
Municipal Water Supply
Wastewater Treatment
Hydrological Monitoring

Typical Applications

Petroleum and chemical storage tanks
Power plant water systems
Municipal water and wastewater treatment
Hydrological monitoring

Technical Specifications

Parameter	Specification
Measuring Range	0–1 m to 200 m
Allowable Overload	1.5 × standard (20%)
Accuracy	±0.2%, ±0.5%
Long-term Stability	≤0.2% FS/year
Operating Temperature	-20°C to 85°C
Storage Temperature	-20°C to 100°C
Power Supply	12–30 VDC (Recommended 24 VDC)
Output Options	4–20 mA, 0–10/20 mA, 0/1–5/10 VDC, RS485, HART
Load Resistance	≤ (U-12)/0.02 Ω
Relative Humidity	95% RH (Non-condensing)
Housing	Cast Aluminum
Wetted Material	304 Stainless Steel
Protection Rating	IP68

Installation Notes

Suitable for direct immersion in liquids with a density of 0.45 g/cm³ or higher
Avoid installation in environments with strong electromagnetic interference

Why Choose the Submersible Liquid Level Transmitter ND101 ?

Reliable liquid level measurement is essential for process control, storage management, and water resource monitoring. The ND-101 combines proven hydrostatic measurement technology with intelligent signal processing to provide dependable performance in long-term submerged applications.

High Measurement Accuracy

High-stability imported sensor chips, precision digital circuitry, and nonlinear correction technology work together to provide consistent liquid level measurement.

Designed for Continuous Submersion

The waterproof and gas-conducting cable incorporates an internal vent tube to maintain atmospheric pressure compensation during long-term immersion.

Flexible Signal Integration

Multiple output options—including 4–20 mA, voltage outputs, RS485, and HART—allow easy integration into PLC, DCS, and industrial automation systems.

Industrial Protection

Integrated reverse polarity protection, current limiting protection, and resistance to lightning strikes and electrical shock help improve operational reliability.

Wide Application Range

With measuring ranges from 1 m to 200 m, IP68 protection, and multiple output configurations, the transmitter is suitable for a variety of industrial liquid level monitoring applications.

Application Case

Continuous Liquid Level Monitoring in Municipal Water Storage Systems

Municipal water treatment and distribution systems require stable liquid level monitoring to maintain continuous operation and improve process efficiency. The ND-101 Submersible Liquid Level Transmitter can be installed directly inside a storage tank or reservoir for continuous hydrostatic level measurement.

As the liquid level changes, the transmitter converts the hydrostatic pressure into a standardized electrical signal, enabling real-time monitoring by a PLC, SCADA, or distributed control system. The measured level data can be used for pump operation, reservoir management, process supervision, and alarm functions.

Featuring an IP68 protection rating, a waterproof vented cable, and a compact integrated design, the ND101 is suitable for long-term submerged operation in municipal water systems, industrial storage tanks, power plant water facilities, and hydrological monitoring applications. Its multiple output options simplify integration into existing automation systems while supporting reliable long-term operation.

Frequently Asked Questions (FAQ)

1. How does the ND-101 liquid level transmitter measure liquid level?

The transmitter measures hydrostatic pressure generated by the liquid column and converts it into a standardized electrical output signal for level monitoring.

2. Where can this transmitter be installed?

It is designed for direct immersion in liquids with a density of 0.45 g/cm³ or higher.

3. What output signals are available?

Available outputs include:

4–20 mA DC
0–10/20 mA DC
0/1–5/10 VDC
RS485
HART

4. What measuring ranges are available?

The transmitter supports measuring ranges from 1 meter up to 200 meters.

5. What protection rating does the transmitter have?

The ND-101 features an IP68 protection rating for long-term submerged operation.

6. What materials are used?

The housing is made of cast aluminum, while the wetted parts are manufactured from 304 stainless steel.

7. Which industries is this transmitter suitable for?

It is suitable for petroleum, chemical processing, power plants, municipal water supply, wastewater treatment, and hydrological monitoring.

8. What should be considered during installation?

The transmitter should be installed in suitable liquids with a density of 0.45 g/cm³ or higher, and strong electromagnetic interference should be avoided.

Overall dimensions

Selection Guide

Requires avoidance of strong electromagnetic interference