Does this device measure frequency?

Hello~Nice day! Sorry to tell you that measurement function only includes voltage, current, active power and energy measurement. Hope this could help you, and thank you for your support!

Can this read 7.7 kw of power? I see the rated power is for 2.2kw but they mention the load can be over rated power.

Yes, but you might need to use an external current sensor. I think the 2.2 kW are in reference to the integrated shunt resistors. They have a limitation in terms of how much current they can take. The meter itself can read 7.7 kW just fine. We have been using it with 10 kW and more in our use case.

Where and how can I get the software to use it with a PC?

The easiest way use the pzem is by connecting it to a esp32/esp8266 or Arduino type board. You can then use the Arduino IDE software or Home Assistant/esphome to program and access the data being sent by the Pzem module

I have the ct placed on a single phase using around 8-10 amps, but the device is reading 80+ amps; anyone else have this problem? how to fix?

What code are you using? What byte (hex) are you receiving?

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PZEM-004T Current Voltage Power Energy Multimeter Module AC 80-260V 100A with Current Transformer

Product ID: 98827688

Details

Brand
Walfront
Color
green yellow
Item Weight
0.01 Kilograms
Power Source
Corded
Style
Modern

⚡AC 80-260V voltage range

📡TTL serial communication interface

🔋100A max current capacity

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Rp693392

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Description

⚡ Empower your energy insights — measure smarter, manage better!

ROBUST LOAD TESTING - Confidently test low-power devices up to 100W for reliable performance insights.
SMART DATA INTERFACE - TTL serial port enables real-time monitoring and easy parameter adjustments.
PRECISION POWER METRICS - Track voltage, current, active power & energy with pinpoint accuracy.
USER FRIENDLY ENERGY RESET - Convenient panel key lets you reset energy readings instantly for fresh tracking.
WIDE VOLTAGE COMPATIBILITY - Seamlessly operates within 80-260V AC range to fit diverse setups.

The PZEM-004T is a compact, high-precision multimeter module designed for AC voltage (80-260V) and current (up to 100A) measurement. Featuring active power and energy tracking, it supports low-power load testing and includes a TTL serial interface for seamless data communication. Its user-friendly energy reset function and robust specs make it ideal for professional-grade electrical monitoring and management.

Specifications

ASIN	B074QGWMKH
Best Sellers Rank	#639,404 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,035 in Multi Testers
Brand	Walfront
Brand Name	Walfront
Color	green, yellow
Customer Reviews	3.8 out of 5 stars 15 Reviews
Item Dimensions	2.87 x 1.18 x 0.91 inches
Item Weight	0.01 Kilograms
Item dimensions L x W x H	2.87 x 1.18 x 0.91 inches
Manufacturer	Walfront
Measurement Type	Multimeter
Minimum Operating Voltage	80 Volts (AC)
Model	Walfrontec37h6rs8d
Part Number	Walfrontec37h6rs8d
Power Source	Corded Electric
Specification Met	IEC 61010-1:2000-1
Style	Modern
Style Name	Modern
UPC	736691419295

Reviews

L**S

Destruction of enemy ships assured

I'm now able to monitor power of my Death Ray. It doesn't really measure current in the gigawatt range but close enough. All hail the Galactic Enterprise!

17.04.2025

A**I

Board Arrived Burnt

Product arrived with clear signs of misuse and damage.

12.03.2026

T**N

Great for Arduino

Great for making your own Arduino energy monitor. Be careful you are playing with mains volatages.

15.12.2019

T**M

Safety issues

It works, but has some safety issues that have been addressed in the PZEM-016 design. OK for R&D, but not in an embedded system. Got the PZEM-016.

27.07.2025

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