Pzem

Advanced Power Measurement Sensor – PZEM‑004T

The PZEM‑004T is a compact, battery‑safe power sensor that accurately measures line voltage, current, active power, apparent power, reactive power, and energy consumption for single‑phase AC circuits. It integrates an analog front‑end IC with an embedded microcontroller, delivering precise, low‑drift readings over a wide temperature range. The sensor’s built‑in RS‑485/Modbus RTU interface facilitates reliable communication with microcontrollers, PLCs, and cloud gateways, making it ideal for distributed energy monitoring and IoT deployments.

With built‑in protection against over‑current and voltage spikes, the PZEM‑004T is suitable for industrial, commercial, and residential applications. Its small form factor, low power consumption, and straightforward firmware support enable rapid integration into smart meters, home automation systems, and remote monitoring platforms.

• Operating Voltage: 110–240 VAC, 1–35 A
• Measurement Accuracy: ±1.5 % for voltage, ±3 % for current, ±1 % for power, ±3 % for energy
• Interface: 4‑wire RS‑485 (Modbus RTU) with configurable baud rate up to 115 200 bps
• Common Use Case: Real‑time energy consumption monitoring for consumer appliances, home energy management, and smart grid edge devices