Why Server and electrical equipment need ER (Electrical Resistance) silver and cooper sensors

Server-grade ER (Electrical Resistance) silver serpentine corrosion probes—used to measure trace corrosive gases in data centers and server rooms (in compliance with ANSI/ISA-71.04 standards)—are also utilized in museums, exhibition halls, storage facilities, and archives, where air quality control is crucial for cultural heritage preservation.
In the electronics and electrical sectors, these probes are used for monitoring in cleanrooms, protecting power distribution systems, control center electrical equipment, and GSM base stations.
They address the degradation of culturally significant indoor artifacts, ultra-valuable electrical equipment, and servers in AI data centers; such degradation is caused by factors including temperature, relative humidity, and concentrations of pollutants like sulfur dioxide and nitrogen oxides.
Indoor environments contain a wide array of interacting pollutants—such as oxides, ozone, ammonia, hydrochloric acid, sulfates, chlorides, organic acids, volatile compounds, and dust particles. The complexity, high costs, and technical challenges associated with these pollutants have led to increasingly severe indoor contamination issues. Current domestic monitoring capabilities are largely limited to temperature, relative humidity, and basic air composition tests—none of which qualify as effective, real-time monitoring technologies for material degradation.
Valuable items are at risk of further damage due to air pollution, creating an urgent need for a tool that can analyze the environment and track degradation over time. Such a tool should enable non-experts to instantly assess air corrosivity in real-time, facilitating the improvement of indoor air quality based on corrosion severity levels.
Key considerations include environmental suitability, system robustness, and the capability for continuous measurement to ensure ongoing air quality improvement.

Nanoscale (High-precision thin-film type)

If the probe were designed to industrial-grade specifications (e.g., thickness exceeding 0.5 mm), it might show no significant change in electrical resistance for decades in a high-cleanliness standard data center, thereby rendering it useless for real-time monitoring or early warning purposes.
Servers within data centers are extremely sensitive to airborne corrosive gases, such as hydrogen sulfide (H₂S) and sulfur dioxide (SO₂). To meet the G1-class air quality standard for server rooms (as defined by ANSI/ISA-71.04), the copper corrosion rate must remain below 300 Å per month. Conventional metal coupons—typically in the micrometer or even millimeter range—cannot detect the minute changes in electrical resistance that occur over such short periods.

LCH utilizes a serpentine thin-film array—fabricated on a ceramic or insulating substrate using semiconductor micro-fabrication techniques like sputtering or evaporation—to address this challenge. Given that the G1 (Mild) compliance standard limits the silver corrosion rate to no more than 200 Å (20 nm) per month, only a probe with a thickness of a few hundred nanometers can sensitively detect the subtle resistance changes within a timeframe of just days or even hours. The system supports wireless operation with an integrated battery and allows for monitoring via mobile phones or DCS (Distributed Control Systems).