The price of ESD (Electrostatic Discharge) monitors is primarily driven by monitoring accuracy, the number of channels, and real-time data logging capabilities. High-end models feature dual-wire technology for more precise resistance measurement compared to single-wire versions. Additionally, monitors equipped with LCD displays, adjustable alarm thresholds, and RS485/Ethernet communication ports for centralized monitoring will command a higher price point due to their integration into Industry 4.0 smart factory environments.