ESM Full-Factor SPD Terminal
ESM Series
Self-developed 10uA leakage-current sensor, monitoring leakage/temperature/voltage/lightning-count/grounding/remote-signaling, with proprietary life prediction and health records.

Product Overview
Full-factor SPD monitoring (ESM lightning protection monitoring module) is a full-factor SPD intelligent monitoring terminal integrating "measure, compute, display, and intelligence" in one unit. The product's self-developed 10μA leakage current sensor delivers a 100x accuracy improvement. With algorithm models trained on massive usage data, it achieves multi-dimensional status monitoring and degradation analysis. It monitors leakage current, body temperature, voltage, lightning strike count, grounding status, SPD remote signal, and upstream circuit breaker status in real time, dynamically calculates a 0~100.0% life value based on 4 key factors, and builds a fine-grained SPD health profile, leaving no hidden risk undetected. Widely applied in parks, railways, ports, airports, agriculture, mining, equipment, meteorology, water utilities, environmental protection, and new energy, it is an ideal "IoT + lightning protection" terminal that leverages high-precision feature data capture and analysis to deliver true degradation trend and degradation ratio functions.
Core Capabilities
Microampere-level leakage current monitoring (10.0~3000.0μA) for early degradation warning. Precision temperature tracking (-30~125°C) to prevent thermal breakdown. 0.1kA-sensitive lightning strike counting, recording 0~9999 surge events. Exclusive life estimation algorithm to quantify remaining value. Product Features
Data Generated10uA leakage sensorFull-factor monitoringLife prediction0-100.0% healthProduct Features10μA-Level Leakage Current Sensing
Self-developed 10μA leakage current sensor with a 100x accuracy improvement. Algorithm models trained on massive usage data enable multi-dimensional status monitoring and degradation analysis.
Exclusive Life Estimation Algorithm
Dynamically calculates a 0~100.0% life value based on 4 key factors - remote signal, count, temperature, and leakage current - with programmable alarm thresholds, shifting from "replacement after failure" to "maintenance before failure".
Multi-Level Intelligent Alarm Linkage
Supports dual protection of local audible/visual alarms and remote communication. Thresholds can be configured for leakage current >3000μA, temperature >60°C, or life
Open Protocol, Seamless Integration
Standard Modbus RTU protocol with 200+ read/write registers fully open. Supports RS485 networking and MQTT cloud access, with configurable byte order and zero integration barriers.
Full-Factor Status Visibility
Use the panel buttons to navigate multi-level query menus to view full-dimensional data including SPD life, three-phase leakage current, temperature, voltage, lightning strike count, and grounding, making hidden risks precisely visible.
Compact, Flexible and Convenient
Default LED digital tube display with optional OLED screen; physical buttons for convenient on-site query and configuration; pluggable terminals, 35mm DIN-rail mounting, and a compact 36mm width for easy installation even in tight spaces. Selection Guide


