PZEM-018 5A AC Digital Display Power Monitor Meter Voltmeter Ammeter Frequency Factor Meter (Without CT)

The PZEM-018 is a compact single-phase AC power monitor designed to measure voltage, current, power consumption, frequency, and power factor in real-time with a bright LCD digital display. Electrical engineers, maintenance technicians, and industrial automation professionals use this meter to diagnose circuit performance, verify load distribution, and optimize energy consumption across residential and light commercial installations. This device solves the critical problem of accurately monitoring AC electrical parameters without requiring external current transformers, making it ideal for direct measurement applications up to 5 amperes.

Product Overview

The PZEM-018 operates on the principle of direct AC measurement, utilizing precision shunt resistors for current sensing and capacitive voltage dividers for voltage measurement. The microcontroller-based design calculates true RMS values, active power (watts), reactive power (VAR), and power factor simultaneously, displaying results on a high-contrast LCD screen. Unlike meters requiring external current transformers (CT), this model integrates the current sensing element directly into the circuit path, eliminating installation complexity while maintaining measurement accuracy within 1% for voltage and current parameters.

The meter features bidirectional energy counting capability, allowing it to track both imported and exported energy in solar or distributed generation systems. Its burden-free design minimizes voltage drop across the measurement circuit, and the wide operating temperature range of -10 to 55 degrees Celsius ensures reliable performance in diverse environmental conditions. The PZEM-018 connects via standard DIN rail mounting or panel cutout installation, making it suitable for retrofit applications in existing electrical panels and distribution boards across industrial and residential settings.

Key Specifications

Specification	Details
Product Type	Single-Phase AC Digital Power Monitor Meter
Brand	PZEM (Peacefair)
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
Voltage Range	80V to 260V AC
Current Range	0 to 5A AC (direct measurement, no CT required)
Power Measurement Range	0 to 1300W
Frequency Range	45Hz to 65Hz
Power Factor Range	0.00 to 1.00
Measurement Accuracy	Voltage 1%, Current 1%, Power 2%
Display Type	7-segment LCD Digital Display
Operating Temperature	-10 to 55 degrees Celsius

Key Features

• Direct 5A AC current measurement without external current transformer (CT), simplifying installation and reducing system cost
• Simultaneous measurement of voltage, current, active power (W), reactive power (VAR), power factor, and frequency on single LCD display
• Bidirectional energy counting with 99999.99 kWh maximum display capacity for tracking both consumption and generation in solar or grid-tie systems
• Precision measurement accuracy of 1% for voltage and current with 2% power accuracy, meeting industrial-grade monitoring standards
• Wide operating voltage range of 80V to 260V AC accommodates single-phase residential and light industrial circuits across different regions
• DIN rail or panel cutout mounting options provide flexible installation in electrical cabinets, distribution boards, and control panels
• Low power consumption design with minimal circuit burden ensures negligible voltage drop during measurement operations
• Real-time LCD display updates every 1 second, enabling instant diagnostics of circuit anomalies and load fluctuations

Applications and Use Cases

• Residential energy monitoring in single-phase household circuits to identify high-consumption appliances and optimize electricity usage patterns
• Solar photovoltaic system monitoring for verifying inverter output power, frequency stability, and power factor compliance before grid synchronization
• Industrial motor and equipment load profiling to diagnose mechanical issues, assess efficiency, and plan preventive maintenance schedules
• Electrical troubleshooting and circuit validation during installation of lighting circuits, HVAC systems, and control panel commissioning
• Power quality assessment in small commercial establishments to detect voltage fluctuations, frequency deviations, and reactive power issues
• Educational laboratory experiments for teaching AC circuit analysis, power factor correction, and energy measurement principles
• Renewable energy system integration testing to verify grid-tie inverter synchronization and harmonic compliance before final approval

How to Use

Begin by selecting an appropriate mounting location in your electrical panel or distribution board where the meter will be easily visible and accessible for reading. For direct measurement up to 5A, connect the phase conductor (live wire) through the meter's current input terminals and the neutral wire to the common terminal, ensuring proper polarity. The voltage measurement terminals should be connected across the phase and neutral to measure line voltage. Secure the meter using DIN rail clips or panel fasteners, and verify all connections are tight before energizing the circuit. Power on the meter and allow 10-15 seconds for the LCD display to initialize and begin showing real-time measurements.

Once operational, monitor the display to observe voltage, current, power, power factor, and frequency values updating every second. For circuits exceeding 5A, do not attempt direct connection as this will damage the internal shunt resistor; instead, use an external current transformer with a compatible meter model. To reset the energy counter (kWh), locate the reset button on the meter housing and press it for 3 seconds until the display shows 0.00 kWh. For troubleshooting, verify that voltage is within the 80-260V range and that the connected load does not exceed 1300W. If the display remains blank, check the circuit breaker and ensure proper neutral connection, as the meter requires both phase and neutral for operation.

Frequently Asked Questions

What is the difference between PZEM-018 and PZEM-004T models?

The PZEM-018 is designed for direct measurement up to 5A without requiring an external current transformer (CT), making it ideal for low-current circuits and residential applications. The PZEM-004T requires an external 100A/5A current transformer for measurement, making it suitable for high-current industrial circuits. Choose PZEM-018 for direct connection to circuits under 5A, and PZEM-004T when you need to measure higher currents with a CT.

Can I use PZEM-018 to measure three-phase power systems?

No, the PZEM-018 is a single-phase meter and can only measure one phase of a three-phase system. To monitor three-phase power, you would need three PZEM-018 units (one per phase) or use a dedicated three-phase power meter like the PZEM-017. Each meter will independently measure its respective phase voltage, current, and power values.

What happens if I connect a load exceeding 5A to the PZEM-018?

Connecting a load exceeding 5A will permanently damage the internal shunt resistor due to excessive current flow and heat generation. The meter is specifically designed for circuits up to 5A maximum. If your application requires measuring higher currents, use the PZEM-004T model with an appropriate current transformer rated for your maximum expected current.

Does the PZEM-018 require a neutral wire connection?

Yes, the PZEM-018 requires both phase (live) and neutral wire connections to operate correctly. The voltage measurement is taken between phase and neutral, and the meter uses the neutral as a reference point for all calculations. Without proper neutral connection, the display will remain blank or show incorrect readings.

Can PZEM-018 measure power factor and reactive power?

Yes, the PZEM-018 displays both power factor (ranging from 0.00 to 1.00) and reactive power (VAR). Power factor indicates the phase angle between voltage and current, while reactive power represents the non-productive component of AC circuits. These measurements are essential for identifying inductive loads and assessing overall circuit efficiency.

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.

Why Buy from The Engineer Store

• Genuine Products: Sourced directly from authorized distributors with authentication
• Expert Team: Our technical team validates every product before listing
• Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
• Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
• Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
• Technical Support: 24/7 expert guidance via email and WhatsApp
• Returns: 7-day return policy on manufacturing defects only

Buy PZEM-018 5A AC Digital Display Power Monitor Meter Voltmeter Ammeter Frequency Factor Meter (Without CT) Online in India

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