PZEM-004T 10A High precision AC Single Phase Current Voltage Energy Meter (Without Coil)
PZEM-004T 10A High precision AC Single Phase Current Voltage Energy Meter (Without Coil)
PZEM-004T 10A High precision AC Single Phase Current Voltage Energy Meter (Without Coil)
The PZEM-004T is a high-precision digital energy meter designed for accurate measurement of AC voltage, current, power consumption, and energy usage in single-phase electrical systems with a maximum current rating of 10 amperes. Electrical engineers, HVAC technicians, renewable energy installers, and industrial automation professionals use this meter to monitor real-time power parameters and diagnose circuit performance issues with exceptional accuracy. This device solves the critical problem of energy wastage identification and circuit load analysis by providing instantaneous and cumulative energy measurements with 0.5% measurement accuracy.
Product Overview
The PZEM-004T operates on the principle of digital signal processing to measure AC electrical parameters through a non-invasive current sensing mechanism. The meter samples voltage waveforms directly from the AC line while measuring current through an external current transformer or shunt connection, then calculates true RMS values, power factor, reactive power, and cumulative kilowatt-hour consumption. The "Without Coil" variant requires external current measurement configuration, making it ideal for custom installations where users need flexibility in current sensing methods or where space constraints prevent integrated coil mounting.
This meter communicates via Modbus RTU protocol over RS-485 interface, enabling seamless integration with industrial control systems, energy management platforms, and IoT monitoring networks. The high-precision measurement capability combined with digital output makes it superior to analog meters for applications requiring data logging, remote monitoring, and automated energy billing systems. The device operates on a 80-260V AC supply range, making it compatible with various international voltage standards and ensuring reliable performance across different geographical regions.
Key Specifications
| Specification | Details |
| Product Type | Digital AC Single Phase Energy Meter |
| Brand | PZEM |
| Origin | Original/Authentic |
| Warranty | 7 days on manufacturing defects |
| Shipping | 1-5 days from Bengaluru |
| Delivery | 7-8 days across India |
| Support | 24/7 via Email and WhatsApp |
| Maximum Current Rating | 10 Amperes AC |
| Voltage Range | 80-260V AC |
| Measurement Accuracy | 0.5% Class |
| Communication Protocol | Modbus RTU RS-485 |
| Display Type | LCD Digital Display |
| Measured Parameters | Voltage, Current, Active Power, Reactive Power, Power Factor, Energy Consumption (kWh) |
Key Features
- High Precision 0.5% Accuracy Class ensures reliable power consumption data for billing, auditing, and energy optimization applications
- Modbus RTU RS-485 Digital Communication enables real-time data acquisition and integration with SCADA systems, building management systems, and IoT platforms
- Multi-Parameter Measurement displays voltage, current, power factor, active power, reactive power, and cumulative energy consumption simultaneously
- Wide Voltage Range 80-260V AC operation ensures compatibility with single-phase residential, commercial, and industrial installations across different regions
- Without Coil Design provides flexibility for custom current sensing configurations using external current transformers or shunt resistors
- Low Power Consumption auxiliary power requirement of less than 2VA minimizes measurement errors and reduces parasitic losses
- Compact DIN Rail Mountable housing allows space-efficient installation in electrical panels and control cabinets
Applications and Use Cases
- Energy Auditing and Consumption Monitoring in commercial buildings and industrial facilities to identify power wastage and optimize electrical loads
- Solar Photovoltaic System Monitoring for measuring real-time power generation and inverter output in grid-tied and off-grid installations
- Industrial Equipment Power Analysis for monitoring motor circuits, heating loads, and production line power consumption with precise energy metering
- Building Management Systems integration for automated energy billing, demand-side management, and real-time power factor correction monitoring
- Renewable Energy Project Verification for validating system performance and energy production claims in wind, solar, and hybrid installations
- Electrical Laboratory Testing and calibration work where high-precision power measurements are required for equipment validation
How to Use
Installation of the PZEM-004T requires careful connection of voltage and current measurement paths. Connect the AC voltage directly across the phase and neutral terminals of the meter, ensuring proper polarity. For the current measurement without integrated coil, you must connect an external current transformer (CT) with appropriate turns ratio to the meter's current input terminals, or use a shunt resistor configuration if preferred. The Modbus RTU interface requires RS-485 twisted pair cabling with proper termination resistors (120 ohms at line ends) for reliable serial communication with your monitoring device or PLC system.
Once connected, configure the Modbus slave address and communication parameters (typically 9600 baud, 8 data bits, 1 stop bit, no parity) using the meter's setup menu accessed through the LCD display. Read voltage, current, power, and energy values through Modbus register queries at regular intervals for data logging and analysis. The cumulative energy counter records total kilowatt-hours consumed and can be reset if needed. Ensure proper grounding of the RS-485 cable shield to the control system ground to minimize electromagnetic interference and ensure stable communication in industrial environments.
Frequently Asked Questions
What is the difference between PZEM-004T with and without coil?
The PZEM-004T Without Coil variant does not include an integrated current transformer, requiring external current measurement configuration. This design offers flexibility for custom installations where you need to select your own current transformer ratio or use alternative current sensing methods. The With Coil version includes a built-in current transformer for direct installation without external components, making it more convenient for standard applications but less flexible for specialized requirements.
Can the PZEM-004T be used with three-phase systems?
No, the PZEM-004T is specifically designed for single-phase AC systems only. For three-phase power measurement, you would need three separate PZEM-004T units (one per phase) or upgrade to a three-phase energy meter like the PZEM-003S or industrial three-phase meters. Each phase can be independently monitored using individual meters connected to a central data collection system.
What external current transformer ratio should I use with the Without Coil variant?
The appropriate current transformer ratio depends on your maximum expected current and the meter's 10A input range. For example, if you expect up to 100A in your circuit, use a 10:1 ratio CT (100A primary to 10A secondary). Common ratios are 5:1, 10:1, 15:1, 20:1, and 50:1. Ensure the CT's secondary current matches the meter's 10A maximum rating to achieve accurate measurements. Consult the meter manual for specific CT selection guidelines.
Does the PZEM-004T measure power factor and reactive power?
Yes, the PZEM-004T measures and displays power factor (cos phi), reactive power (VAR), and reactive energy (kVARh) in addition to active power (kW) and active energy (kWh). This makes it suitable for power quality analysis and identifying reactive power issues in industrial installations. Power factor data is essential for understanding circuit efficiency and planning power factor correction equipment.
How do I integrate PZEM-004T with my PLC or monitoring system?
Connect the meter's RS-485 terminals to your PLC or industrial gateway using twisted pair shielded cable. Configure the Modbus RTU parameters on the meter to match your system settings. Use standard Modbus function codes (typically FC03 for holding registers) to read voltage, current, power, and energy values from specific register addresses documented in the PZEM-004T manual. Most industrial automation platforms and IoT gateways have native Modbus RTU support for straightforward integration.
When will I receive my order?
Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.
What is your return and warranty policy?
We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.
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- Returns: 7-day return policy on manufacturing defects only
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