Product Summary

The NOIKE-AH Submersible Level Transmitter LK-136P is a high-precision hydrostatic level sensor designed for continuous liquid level measurement in tanks, reservoirs, boreholes, rivers, and industrial process systems.

Equipped with a high-stability imported pressure sensing chip and intelligent digital compensation technology, the LK-136P provides reliable and accurate level measurement even in demanding industrial environments. Its fully sealed stainless steel construction and waterproof vented cable allow long-term immersion while maintaining excellent stability and measurement accuracy.

Supporting multiple output options including 4–20 mA, 0–10 V, RS485, and HART, the transmitter is ideal for PLC, DCS, SCADA, and industrial automation systems.

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Working Principle

The Submersible Level Transmitter LK-136P based on the hydrostatic pressure principle.

As the liquid level increases, the pressure exerted on the sensing diaphragm rises proportionally. The internal pressure sensor converts this hydrostatic pressure into an electrical signal. Intelligent digital processing and nonlinear compensation ensure highly accurate level measurement while minimizing temperature drift and long-term deviation.

The vented cable continuously compensates for atmospheric pressure changes, allowing the transmitter to provide stable and precise level measurements.

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Key Features

• High-stability imported pressure sensing chip
• Intelligent digital signal processing and nonlinear compensation
• Laser temperature compensation for excellent long-term stability
• Waterproof vented cable for continuous immersion
• Compact two-wire design
• Reverse polarity and overcurrent protection
• Lightning and surge resistance
• Stainless steel 304 or 316 housing
• IP67 protection rating
• Multiple output options for industrial automation
• Suitable for long-term continuous liquid level monitoring

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Technical Specifications

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Typical Application Cases

Water Storage Tanks

Continuously monitors water levels in municipal reservoirs, rooftop tanks, underground storage tanks, and industrial water systems, providing stable signals for automatic pump control.

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Wastewater Treatment Plants

Installed in sewage tanks, equalization tanks, and treatment basins for continuous liquid level monitoring, pump protection, and overflow prevention.

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Rivers, Lakes and Hydrological Monitoring

Used in rivers, lakes, reservoirs, irrigation systems, and flood monitoring stations to provide accurate real-time water level data for environmental and water resource management.

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Chemical Storage Tanks

Suitable for compatible chemicals stored in process tanks where continuous liquid level monitoring is required. Stainless steel construction provides reliable performance in industrial environments.

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Petroleum and Fuel Storage

Used for monitoring liquid levels in diesel tanks, fuel oil tanks, and industrial storage vessels, enabling inventory management and process control.

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Power Plants

Monitors condensate tanks, cooling water tanks, and industrial process water systems to ensure reliable operation of power generation equipment.

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Installation Guidelines

• Install the transmitter vertically for optimal measurement accuracy.
• Ensure the sensing probe remains completely submerged during operation.
• Suitable for liquids with a density of 0.45 g/cm³ or greater.
• Avoid installation near strong electromagnetic interference sources.
• Secure the cable properly to prevent excessive mechanical stress.

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Frequently Asked Questions (FAQ)

What is a submersible level transmitter?

A submersible level transmitter is a hydrostatic pressure sensor designed to continuously measure liquid levels by detecting the pressure generated by the liquid column.

How does the LK-136P measure liquid level?

The sensor converts hydrostatic pressure into an electrical signal. Intelligent digital compensation then calculates the corresponding liquid level with high accuracy.

Which output signals are available?

The LK-136P supports 4–20 mA, 0–10 V, RS485, and HART, making it compatible with PLC, DCS, SCADA, and other industrial control systems.

Can the transmitter remain underwater permanently?

Yes. The waterproof sealed construction and vented cable are designed for continuous long-term immersion.

Which industries commonly use this transmitter?

It is widely used in water treatment, municipal water supply, hydrology, chemical processing, petroleum storage, power plants, reservoirs, irrigation systems, and industrial automation.