PZEM-004T 100A Energy Monitor with CT Price in Bangladesh

The PZEM-004T 100A Energy Monitor with CT is a multifunctional AC electrical measurement module designed for monitoring electricity usage and analyzing power consumption. It is suitable for electronic engineering projects, smart energy monitoring systems, home electricity experiments, industrial monitoring prototypes and IoT-based power measurement applications.

Unlike a basic voltage or current sensor, this module measures several important electrical parameters through one integrated measurement system. Depending on the compatible model and firmware, it can report AC voltage, current, active power, accumulated electrical energy, frequency and power factor. These readings help users understand how much electricity a connected load is consuming and how the electrical system is operating.

The 100A version uses an external current transformer (CT) to measure current. This arrangement makes it suitable for applications where the load current is too high to pass directly through a small measurement module. The CT senses the magnetic field generated by current flowing through a conductor and provides a corresponding measurement signal to the PZEM-004T module.

For electronics enthusiasts, the PZEM-004T can serve as the measurement component in a smart electricity meter or power monitoring project. Compatible V3.0 models communicate with a microcontroller or computer through a TTL serial interface, allowing measured data to be processed and displayed on an LCD, OLED, computer dashboard or IoT platform.

The module does not normally include a built-in screen. Instead, measurements are retrieved through its communication interface and displayed using suitable external hardware or software.

What Is the PZEM-004T 100A Energy Monitor?

The PZEM-004T is an AC measurement and communication module that combines voltage sensing, current measurement and digital processing to calculate and report electrical parameters. The 100A version uses an external current transformer rather than the internal current-measuring shunt found in the 10A variant.

The module is commonly used with single-phase AC systems within its specified voltage and current limits. Its ability to measure active power and accumulated energy makes it useful for studying actual electricity consumption rather than simply checking voltage or current independently.

The PZEM-004T V3.0 documentation specifies a voltage measurement range of 80–260V AC and a current range of up to 100A for the CT version. The corresponding active-power range is commonly specified up to 23kW. Actual usable power depends on the voltage, current, load and applicable electrical installation limits.

Key Features of the PZEM-004T 100A Energy Monitor

1. Wide-Range AC Voltage Measurement

The module measures AC voltage within its specified operating measurement range. For the common V3.0 version, this range is 80–260V AC. Voltage readings help users monitor supply conditions and observe voltage changes when electrical loads are switched on or off.

This function is useful in household energy monitoring experiments, electrical laboratory demonstrations and automated power measurement systems.

2. Current Measurement up to 100A

The included 100A current transformer enables the module to measure current in a conductor without passing the entire load current through the measurement board. This is a major advantage for monitoring higher-current AC circuits.

The CT must be compatible with the meter and installed according to its wiring instructions. The 100A rating is a measurement limit, not a recommendation to operate an electrical circuit at 100A without properly rated wiring, protection and equipment.

3. Active Power Measurement

The PZEM-004T reports active power in watts. Active power represents the rate at which electrical energy is consumed by a load and is particularly useful when assessing the power demand of appliances, motors, heaters and other electrical equipment.

On commonly documented V3.0 100A models, the active-power measurement range extends to approximately 23kW. The permitted load must still comply with the voltage, current and installation limits of the complete system.

4. Accumulated Energy Measurement

The module tracks accumulated active energy, generally expressed in watt-hours (Wh) or kilowatt-hours (kWh). This feature helps users monitor consumption over time instead of relying on a single instantaneous power reading.

For example, a smart energy monitor can collect energy readings at intervals and use them to estimate the consumption of a connected load over a day or week. Energy reset and storage behaviour depend on the module version and supported commands.

5. Frequency and Power Factor Measurement

The module can measure AC frequency, commonly over 45–65Hz, and power factor over a range of 0.00–1.00. Frequency measurement is useful for monitoring the supply frequency, while power factor helps characterize the relationship between active power and apparent power.

These additional parameters make the PZEM-004T more informative than a basic voltmeter or ammeter.

6. Serial Communication for Microcontroller Projects

Compatible PZEM-004T V3.0 modules use a TTL UART serial interface with Modbus-RTU communication. This allows a supported microcontroller or computer interface to request measurement data.

With appropriate code and wiring, the readings can be used in Arduino, ESP32 or other compatible development projects. Confirm the exact hardware revision and communication protocol before choosing a software library.

7. External Current Transformer

The external CT senses the current in a conductor and sends a corresponding signal to the measurement module. Depending on the CT construction, it may have a solid-core or split-core design. A split-core type can be easier to install around an existing conductor without disconnecting the conductor itself, but installation must still be performed safely.

Technical Specifications

Specification note: These are common PZEM-004T V3.0 specifications. Other revisions and clones may differ in accuracy, communication details, connectors and supported functions. Verify the markings and documentation of the supplied unit before installation.

Working Principle

The PZEM-004T uses voltage sensing and current-transformer measurements to determine electrical parameters in an AC circuit.

First, the voltage-measurement section senses the AC supply voltage through the module’s designated voltage terminals. The current transformer detects the magnetic field generated by the current flowing through the monitored conductor. The module processes the corresponding voltage and current signals to determine the electrical measurements supported by its design.

Using the voltage and current information, the module calculates active power while accounting for the phase relationship between voltage and current. It also measures supply frequency and derives power factor. By accumulating measured power over time, it tracks electrical energy consumption.

The module makes these readings available through its supported communication interface. A connected microcontroller or computer can retrieve the values and use them for display, logging, alerts or automated energy management.

For a typical V3.0 project, the measurement module is connected to a compatible AC circuit, its CT is installed around the correct conductor, and the TTL interface is connected to a controller using the appropriate serial wiring and voltage levels.

Applications of the PZEM-004T 100A Energy Monitor

Smart Electricity Meter Projects

Build an experimental electricity meter that reads voltage, current, power and accumulated energy. A controller can display the results and store historical consumption data.

Arduino and ESP32 Projects

Use a compatible PZEM-004T version with Arduino or ESP32 to develop energy-monitoring demonstrations. Check the controller’s UART voltage requirements and use appropriate level shifting when necessary.

IoT Energy Monitoring

Send measurement readings to a local dashboard or compatible IoT platform to view power consumption remotely. Software, network connectivity and a suitable controller are required for this functionality.

Home and Workshop Power Analysis

Monitor compatible single-phase AC loads to compare their current draw, active power and energy usage. The meter can help identify changes in consumption when used as part of a properly designed installation.

Educational and Laboratory Experiments

The module is useful for electronics, electrical engineering and embedded-systems projects involving AC measurement, serial communication, data logging and energy calculations.

Renewable Energy Monitoring

Use it in suitable AC-side monitoring projects to observe power and energy in compatible single-phase systems. It is not a direct DC solar-panel or battery monitor; a suitable AC measurement point is required.

Industrial Monitoring Prototypes

In appropriately engineered installations, the module can provide measurement data for a prototype monitoring or automation system. It should not be treated as a certified utility billing meter or safety protection device.

Advantages

• Multiple measurements in one module: Monitor voltage, current, active power, energy, frequency and power factor.
• High current measurement capability: The external CT version supports current measurement up to its specified 100A limit.
• Microcontroller integration: Compatible V3.0 units provide serial data for embedded projects.
• Energy tracking: Accumulated energy readings help evaluate electricity consumption over time.
• Useful for IoT development: Measurement data can be processed, recorded and displayed using additional hardware and software.
• Suitable for learning: Supports practical projects involving AC measurements, power calculations and communication protocols.
• Compact measurement hardware: The module can be incorporated into a suitably designed enclosure or monitoring prototype.

Limitations and Important Considerations

• The standard module does not have a built-in display; a controller, computer or compatible display system is needed to present the measurements.
• The 100A CT version measures AC current within its specified range. It is not intended for direct DC current measurement.
• The measurement range and accuracy should not be assumed to match a certified revenue-grade electricity meter.
• Communication protocols and wiring can differ between hardware revisions. Confirm whether the module is V3.0 before using a library designed for that version.
• The module’s voltage and current limits do not replace the need for appropriate circuit breakers, fuses, conductor sizing and electrical enclosures.
• The standard version is designed for compatible single-phase AC measurement, not direct three-phase measurement.
• Voltage and current measurement do not, by themselves, make the module a protective relay or a complete electrical safety system.

Installation and Usage Tips

1. Confirm the version: Check the module label, CT rating, terminal arrangement and documentation before connecting it.
2. Use a suitable CT: Use the specified 100A CT and connect its secondary leads to the designated terminals.
3. Position the CT correctly: The CT should surround the intended current-carrying conductor only. Passing both live and neutral conductors through the same CT usually causes their magnetic effects to cancel, resulting in an incorrect or near-zero current reading.
4. Follow the circuit diagram: Connect the voltage-sensing terminals and CT according to the exact module manual.
5. Connect the serial interface correctly: For a typical UART connection, module TX goes to controller RX and module RX goes to controller TX. Connect the logic-side supply and ground as required.
6. Check logic voltage compatibility: Do not assume that a 5V TTL signal is safe for a 3.3V-only controller input. Use a suitable level shifter or voltage divider where required.
7. Use compatible software: For V3.0 modules, select a library or program supporting the appropriate Modbus-RTU communication settings.
8. Verify readings: Compare the readings with a suitable reference instrument under safe, controlled conditions.
9. Enclose the installation: Keep exposed mains terminals inaccessible and protect the module from moisture, accidental contact and mechanical damage.

Electrical safety warning: This product is used with potentially lethal AC mains voltage. Disconnect power before making or changing connections. Installation and testing on mains circuits should be carried out by a qualified person using suitable protective equipment and an appropriate enclosure. Never connect mains voltage directly to a microcontroller or the low-voltage serial pins.

Why Choose the PZEM-004T 100A Energy Monitor?

The PZEM-004T 100A is a practical option for projects that need more than basic voltage or current measurement. Its combination of AC measurement, accumulated energy tracking and serial data output makes it useful for smart-meter prototypes, electrical experiments and embedded energy-monitoring systems.

The external CT arrangement is particularly helpful for measuring current without routing the full load current through the measurement board. When paired with compatible controller hardware and properly designed electrical connections, the module can form the measurement foundation of a useful monitoring project.

Why Buy from ElectroXBD?

ElectroXBD supplies electronic components, sensors, modules and robotics-related products for students, educators, makers, engineers and project developers in Bangladesh.

Whether you are building an Arduino energy meter, an ESP32-based monitoring system, an electrical laboratory project or an IoT prototype, ElectroXBD can help you source electronic components for your development needs.

Order and contact details

• Website: https://electroxbd.com
• WhatsApp / Mobile: 01600334238
• Email: electroxbd@gmail.com
• Address: H#1/1, Opposite of RH Chhatrabash, Vodra-Talaimari Road, Rajshahi, Bangladesh.

Frequently Asked Questions (FAQ)

1. What does the PZEM-004T 100A Energy Monitor measure?

It measures AC voltage, current, active power, accumulated energy, frequency and power factor on compatible single-phase AC systems.

2. What is the maximum current supported by the PZEM-004T 100A?

The 100A CT version is designed to measure AC current up to 100A, subject to the specifications of the supplied module and CT.

3. Does the PZEM-004T include a display?

The standard PZEM-004T module does not have a built-in display. Measurement data can be read through its supported serial interface and shown using a compatible controller, display or computer application.

4. Can I use the PZEM-004T with Arduino?

Yes, a compatible version can be integrated with Arduino using the appropriate serial connections and software library. Confirm the module revision and electrical logic-level requirements first.

5. Can I use the PZEM-004T with ESP32?

Yes, compatible versions can communicate with an ESP32 through UART. Pay particular attention to the ESP32’s 3.3V logic limits and use suitable signal-level conversion where necessary.

6. What is the purpose of the current transformer?

The CT senses AC current flowing through a conductor and provides a corresponding signal to the meter. It lets the 100A version measure current without routing the full load current through the measurement board.

7. Can this module measure DC voltage or DC current?

No. The standard PZEM-004T is designed for AC power measurement. Use an appropriate DC measurement device for batteries, DC power supplies and solar-panel outputs.

8. Does the PZEM-004T measure electricity consumption in kWh?

Yes. Compatible versions track accumulated active energy, commonly reported in Wh or kWh. The exact range, storage behaviour and reset procedure depend on the hardware version.

9. Is the PZEM-004T suitable for a three-phase electrical system?

The standard module is intended for single-phase AC measurement. Three-phase monitoring requires an appropriate multi-phase metering solution or a properly designed system using suitable measurement channels.

10. Where can I buy the PZEM-004T 100A Energy Monitor with CT in Bangladesh?

You can buy the PZEM-004T 100A Energy Monitor with CT from ElectroXBD, a trusted electronics components supplier in Bangladesh. Visit https://electroxbd.com or contact WhatsApp/mobile 01600334238 for product availability and ordering information.

Common Questions:

Q: What is the price of PZEM-004T 100A Energy Monitor with CT in Bangladesh?

A: The latest price of PZEM-004T 100A Energy Monitor with CT in Bangladesh is 1350 BDT.

Q: Where to buy PZEM-004T 100A Energy Monitor with CT in Bangladesh?

A: You can buy the PZEM-004T 100A Energy Monitor with CT at the best price from ElectroXBD in Bangladesh.