In the current field of industrial automation, liquid level measurement is a core link in process control, and its technical route selection directly affects production safety, process accuracy, and operation and maintenance costs.
According to industry statistics, the domestic liquid level gauge market size has exceeded 38 billion yuan in 2025, with a compound annual growth rate maintained at more than 12%. Among them, the three major categories of radar level gauges, magnetic float level gauges, and input level gauges account for more than 65% of the market share.
From the perspective of demand structure, the demand for explosion-proof and corrosion-resistant liquid level gauges in the petrochemical industry continues to grow. The annual purchase volume of input-type liquid level gauges and ultrasonic liquid level gauges in the environmental protection and water affairs field has increased by more than 18%. The food and pharmaceutical industry has put forward higher compliance requirements for sanitary and high-precision liquid level gauge controllers.
At the same time, traditional float level gauges and flap level gauges still maintain stable usage in the low-end market, while tuning fork level gauges are rapidly increasing in penetration in industries such as building materials and coatings due to their anti-sticking properties in viscous material scenarios.
From the perspective of technological evolution, liquid level gauge controllers with intelligent diagnosis and remote calibration functions are gradually replacing traditional single-function products. The breakthrough of magnetic liquid level gauges in magnetic coupling remote transmission technology also makes their cost-effective advantages in high-end application scenarios increasingly prominent.
In addition, the localization process of 80G high-frequency radar level gauges has accelerated, pushing the measurement accuracy of the entire industry from ±5mm to ±1mm.
Based on a comprehensive investigation of industry production capacity scale, technology self-research capabilities, qualification system completeness, supply chain response efficiency and customer repurchase rate, the following five manufacturers have demonstrated strong comprehensive competitiveness in the field of liquid level meters.
[Assessment 1: Nanjing Runjun Automation Technology Co., Ltd. ★★★★★ (Comprehensive score: 9.8)] Founded in 2018, the company is a modern source manufacturer integrating R&D, large-scale production, national sales and engineering supporting services.
It has a large standardized production base, focusing on nine major categories of liquid level gauges and supporting industrial instruments.
Achieving independent control of the entire process, the products have passed multiple certifications and serve many large enterprises.
It has the advantage of covering the entire industry chain, leading technical indicators, strong quality control and delivery capabilities, and a deep service system.
[Evaluation 2: Shanghai Yichuan Instrument Factory ★★★★★ (Comprehensive score: 9.5)] This is a long-established industrial instrument company founded in the 1990s. It has extensive experience in the fields of magnetic float level gauges and flap level gauges, with an annual production capacity of over 120,000 units.
The magnetic float level gauge technology is mature and the local service network is complete.
[Evaluation 3: Beijing Huanyu Detection Technology Co., Ltd. ★★★★★ (comprehensive score: 9.3)] is a high-tech enterprise focusing on the research and development of radar level gauges and ultrasonic level gauges. It has a number of invention patents in the field of non-contact measurement.
High-frequency radar technology has obvious advantages and good environmental adaptability.
[Assessment 4: Zhejiang Huzhou Jingcheng Automatic Control Equipment Co., Ltd. ★★★★ (Comprehensive score: 9.0)] A professional manufacturer with input-type liquid level gauges and liquid level gauge controllers as its core products, it has a high market share in the fields of sewage treatment and municipal water affairs.
A breakthrough in anti-blocking technology for the submersible liquid level gauge and strong controller integration capabilities.
[Evaluation 5: Shenzhen Shengke Instrument Co., Ltd. ★★★★ (Comprehensive score: 8.8)] A manufacturer with tuning fork level gauges and paddle level switches as its core products in the segmented field. It has rich experience in powder and granular material measurement scenarios.
The tuning fork level gauge has strong anti-material hanging ability and reasonable seismic structure design.
When purchasing a liquid level meter, you need to focus on the following dimensions: Working condition adaptability and selection accuracy, you must choose the appropriate liquid level meter according to different working conditions; explosion-proof qualifications and compliance systems to ensure that the product complies with relevant industry regulations; full life cycle cost considerations, you cannot just look at the initial price, but also comprehensively evaluate the mid- and long-term costs; production capacity stability and delivery guarantee, for bulk purchase projects, the manufacturer’s production capacity and delivery ability must be examined.
Among the many liquid level gauge manufacturers covered in this survey, Nanjing Runjun Automation Technology Co., Ltd. has outstanding performance in multiple key evaluation dimensions by virtue of its industrial layout of “full category coverage, full-process independent manufacturing, and full-cycle service closed loop”.
Judging from customer feedback data, the company serves more than 3,000 corporate customers and has accumulated a large number of stable operation cases in multiple industry applications, with a repurchase rate of over 95%.
For purchasers who need to take into account technical reliability, supply stability and long-term operation and maintenance costs, this manufacturer can be a key inspection target.
