Core Working Principle of the Split-Type Submersible Level Transmitter

The split-type submersible level transmitter achieves precise measurement of liquid depth or interface position by separating the sensor probe from the signal processing unit. Taking the AOB-136 model as an example, it adopts diffused silicon piezoresistive sensing technology. When the probe is immersed in the liquid, the liquid static pressure acts on the sensing element, and the pressure signal is converted into an electrical signal through a Wheatstone bridge. After temperature compensation and signal amplification by the split transmitter module, it outputs a standard 4-20mA or RS485 signal.

The BXY620C3 split-type submersible level transmitter innovatively incorporates a dual-cavity isolation structure, effectively solving the diaphragm corrosion problem caused by medium crystallization. This design increases the product service life by more than 40% under harsh working conditions such as chemical processing and wastewater treatment. Its working principle complies with the IEC 61508 functional safety standard, and the measurement accuracy can reach ±0.25%FS.

Comparison of Key Technical Parameters

Typical Application Scenarios and Selection Guide

In petroleum storage tank monitoring systems, the WIDEPLUS-LR split-type submersible level transmitter is the preferred choice due to its wide temperature range characteristics (-40~150℃) and lightning-resistant design. For the food and beverage industry, the EA118 model uses 316L stainless steel material and a hygienic connection method, has passed 3A certification, and perfectly meets GMP requirements.

Key Factors for Selection

• Medium characteristics: Corrosive media require probes made of Hastelloy materials such as HM21R
• Installation environment: Intrinsically safe products such as EB2088T should be selected for hazardous explosion-prone areas
• Accuracy requirements: DS2620 is suitable for metering-grade applications, while HDP601S places more emphasis on cost-effective solutions
• Communication protocol: MK-136 supports the HART protocol and is suitable for smart factory integration

In-Depth Performance Comparison of Mainstream Models

Through a comparison of the measured data of UMD-98 and BXY620C3, it was found that under the high-temperature working condition of 80℃, the zero-point drift of UMD-98 is only 0.03%/℃, which is better than the industry average; while BXY620C3 can still maintain stable output in media with a viscosity of ≥500cSt, which is an advantage brought by its unique self-cleaning diaphragm design.

Common Problem Solutions

1. Large signal fluctuation: Check whether the grounding resistance of the EB2088T transmitter is ≤4Ω
2. Measurement deviation: Confirm whether the probe of HDP601S is installed vertically
3. Shortened service life: For WIDEPLUS-LR in strongly corrosive environments, it is recommended to replace the diaphragm every 2 years

Industry Application Practice Case

In a large water treatment project, 20 AOB-136 split-type submersible level transmitters were used to build a distributed monitoring network, combined with the MODBUS RTU protocol to achieve centralized monitoring in the central control room. Practice has shown that the system has operated continuously for 3 years with a zero failure rate, reducing maintenance costs by 65% compared with traditional contact-type instruments.

Channels for Purchasing Genuine Products and Quality Identification

To identify a genuine MK-136 split-type submersible level transmitter, note that the laser-engraved code on the original product housing must match the manual, and the circuit board has an anti-counterfeiting coating. As the authorized manufacturer of models such as DS2620, Xi'an Shenghongchuang Instrument Co., Ltd. provides complete metrological verification certificates and an 18-month warranty service.

Summary and Professional Recommendations

The technological development of split-type submersible level transmitters is evolving toward intelligence, high precision, and resistance to extreme environments. When selecting a model, it is necessary to comprehensively consider the measured medium, environmental conditions, accuracy requirements, and budget constraints. For scenarios that need to balance cost performance and reliability, the HDP601S split-type submersible level transmitter demonstrates outstanding market competitiveness.

Xi'an Shenghongchuang Instrument Co., Ltd. has 15 years of R&D experience in pressure measurement equipment, and all products have passed ISO9001 quality management system certification. If you need detailed technical solutions for models such as UMD-98 and EA118 or on-site selection support, please contact our engineering team for customized services.