The PQ-Box portfolio of mobile power quality meters and analyzers supports structured grid problem analysis and the objective assessment of voltage quality. It is designed for utilities, industrial companies, and technical service providers responsible for stable and standards-compliant power grids.
Typical applications:
- Clarification of network problems with unclear causes or contradictory statements
- Temporary measurement campaigns for objective evaluation of voltage quality
- Root cause analysis for malfunctions, complaints, or liability issues
- Support for planning, commissioning, or acceptance of electrical systems
These Devices Are Suitable If:
- Temporary, flexible measurement is required.
- Well-founded decisions are to be made based on real measurement data.
- The measurement is to be carried out independently of location and without interfering with continuous operation.
- Different measurement tasks must be covered with one device.
Mobile Power Quality Analysis, Measurement and Fault Recording in One Device
Products
Application Areas
PQMobil - Mobile Network Analysis and Troubleshooting in the Event of a Fault
A. Eberle GmbH & Co. KG
Measure. Regulate. Across All Grids.
A. Eberle GmbH & Co. KG, founded in 1980 and headquartered in Nuremberg, Germany, operates in the field of measurement and regulation technology for the energy sector as well as for medium-sized and large industrial companies. Our products and services ensure and enhance the availability of energy supply across all voltage levels and support the integration of renewable energy sources into power grids.
»PQ-Box« - Mobile Power Quality Meters for Grid Analysis and Rapid Fault Diagnosis
Engineered for tough conditions. Built for rapid analysis. Designed for intuitive operation.
The PQ-Box family includes portable power quality meters and analyzers that combine power and frequency analysis, power measurement and, depending on the model, transient recording in a compact device.
Ease of use and intuitive operation were key priorities during development. For fast and reliable analysis of power quality, these high-precision Class A instruments (IEC 61000-4-30 Ed.4) are equipped with a wide range of trigger functions and pre-installed standard-compliant report templates.
All mobile power quality devices fulfil the high demands of IP65 and can also be installed and used outside. They also have a large operating temperature range of – 20°C to + 60°C.
In addition to IEC 61000-4-30 Ed.4, the measuring devices also fulfil all requirements of the measuring device standards IEC62586-1 and IEC62586-2 Ed.2 for Class A devices.
NEW: Power Quality Services by A. Eberle
Power Quality
Services
Expert Knowledge That Moves You Forward
We offer you power quality audits with troubleshooting in accordance with EN 50160 and IEC 61000 and support you with our expert know-how. As the market leader in the field of mobile power quality devices, we can draw on a wide range of network analyzers with the appropriate accessories for our services.
Our Portfolio at a Glance
»PQMobil« - The First Choice for Portable Grid Analysis & Rapid Fault Diagnosis
Not Sure What Device Is the Right One for You?
Find the Right Mobile Power Quality Meter or Analyzer for Your Application
PQ-Box ONE
PQ-Box 50
PQ-Box 150
PQ-Box 200
PQ-Box 300
40,96 kHz
Sampling frequency voltage40,96 kHz
Sampling frequency current-
2 (16-bit)
Input voltage (resolution)1 (16-bit)
Input current (resolution)-
1 GB
Memory size•
WLAN / USB-C(UPS 30 s)
Operating time via battery
20,48 kHz
Sampling frequency voltage20,48 kHz
Sampling frequency current-
4 (16-bit)
Input voltage (resolution)4 (16-bit)
Input current (resolution)-
1 GB
Memory size•
WLAN2 h
Operating time via battery
20,48 kHz
Sampling frequency voltage20,48 kHz
Sampling frequency current-
4 (24-bit)
Input voltage (resolution)4 (24-bit)
Input current (resolution)-
4GB (32)
Memory size (optional)S1
WLAN4,0 h
Operating time via battery
40,96 kHz
Sampling frequency voltage40,96 kHz
Sampling frequency current4 MHz
Sampling frequency transient measurement4 (24-bit)
Input voltage (resolution)5 (24-bit)
Input current (resolution)•
Binary input8GB (32)
Memory size (optional)S1
WLAN4,0 h
Operating time via battery
40,96 kHz
Sampling frequency voltage40,96 kHz
Sampling frequency current409,60 kHz
Sampling frequency transient measurement4 (24-bit)
Input voltage (resolution)5 (24-bit)
Input current (resolution)•
Binary input8 GB (32)
Memory size (optional)S1
WLAN3,5 h
Operating time via battery
WinPQ mobile
High-End Analysis Software
WinPQ mobile prepares and visualises archived power quality measurements and fault events from all PQ-Box devices for analysis on a PC.
PQ-Box App
Easily Read out Power Quality Data From Your Tablet or Smartphone
The PQ-Box app enables wireless access to your PQ-Box via WLAN with visualisation and display of various live measurement data, including basic parameterisation of the device. In addition to an overview of the online data, the recorder and events, power and energy, pointer diagram, oscilloscope image and harmonics of the PQ-Box can be viewed. Basic parameterisation of the device is also possible. The intuitive operation guarantees simple and mobile operation of your PQ-Box from A. Eberle.
The Right Box for Every Frequency
Our Mobile Power Quality Analyzers
Modern devices and equipment such as switched-mode power supplies, frequency converters, controlled drives, e-mobility chargers and LED lighting operate with high switching frequencies to control power efficiently. These switching processes can cause both line-bound and field-bound influences in the power grid.
Typical clock frequencies of systems and devices that we have to reckon with in our networks today:
- 4 kHz to 20 kHz: Frequency converter drive
- 16 kHz to 22 kHz: Solar inverter (400V)
- 2 kHz to 6 kHz: Wind power plant (medium voltage grid)
- 10 kHz to 80 kHz: E-mobile
- 8 kHz to 20 kHz: Active grid filter
- 15 kHz to 25 kHz: UPS systems
- 20 kHz to 200 kHz: Electronic ballast
- 30 kHz to 300 kHz: Switching power supplies
The power quality analyzers from A. Eberle have a high bandwidth that is free of aliasing effects up to 170 kHz (PQ-Box 300).
These devices can be used to detect the mains feedback in the super-harmonic range of solar inverters, e-mobiles and frequency converters. The IEC61000-2-2 standard already offers compatibility levels for the public grid of up to 150 kHz. These limit values are already stored in our measurement technology.
FAQ - Frequently Asked Questions
What is a mobile power quality meter?
A mobile power quality meter is a portable analyzer used to measure, record and evaluate voltage quality, power disturbances and fault events. Depending on the model, it can also record transients and is suitable for temporary measurements at changing locations.
When is a mobile power quality analyzer the right choice?
It is the right choice when faults need to be analysed on site, when permanent monitoring is not required, or when you need flexible measurements for troubleshooting, complaint clarification or acceptance testing.
What can a mobile power quality analyzer measure?
Depending on the device, it can measure voltage quality, current, frequency, harmonics, events, dips, swells, flicker, unbalance, energy data and transients. This allows both quick fault detection and detailed power quality analysis.
Which device is suitable for socket outlet measurements?
For socket outlet measurements, a compact device such as the PQ-Box ONE is a practical choice. It is designed for quick and simple measurements close to the load.
Which device is suitable for more advanced troubleshooting?
For more advanced troubleshooting, 3-phase measurements and detailed event analysis, higher-performance models such as the PQ-Box 150, PQ-Box 200 or PQ-Box 300 are more suitable.
Can mobile power quality analyzers be used for temporary measurement campaigns?
Yes. They are specifically designed for temporary and flexible measurement campaigns, for example in industrial plants, utility grids, buildings, data centers or renewable energy applications.
Do these analyzers support Class A measurements?
Yes. The Class A devices in the portfolio support precise, standards-compliant and comparable power quality measurements in accordance with IEC 61000-4-30 Ed.4.
Can these devices measure high-frequency disturbances?
Yes, depending on the model, they can also detect high-frequency disturbances and fast events, which is important for analysing modern power systems with converters, charging infrastructure and power electronics.
How are the measurement results analysed?
Recorded PQ-Box measurements and fault events are analysed with WinPQ mobile. The software displays measurement data, events, harmonics and reports to support root cause analysis, measurement comparison and professional documentation.
News From the Productgroup
PQMobil - News
Blogpost
GRUNDIG AKADEMIE visits A. Eberle
7. August 2026
In 2026, the GRUNDIG AKADEMIE Nuremberg visited A. Eberle with a group of trainee technicians. During the visit, the participants gained an insight into our company, technical fields of work and potential[...]
Read more
Blogpost
A. Eberle named one of the TOP 100 Innovators for 2026
22. July 2026
As part of the 2026 TOP 100 Awards, we had the honour of receiving a special accolade in Heidelberg last week – presented in person by Christian Wulff, former Federal President and mentor of the TOP[...]
Read more
Blogpost
International Partner Week 2026 - Exchange, knowledge transfer and collaboration in Nuremberg
1. June 2026
We were delighted to welcome our international partners to Partner Week 2026. The chance to chat in person, seeing familiar faces and making new acquaintances made the week a special one for us.[...]
Read more
General Knowledge
Electrical Resistance
13. May 2026
Electrical resistance is one of the fundamental quantities in electrical engineering. This article explains the definition, unit, symbol, Ohm's law, resistance measurement and the role of resistance in[...]
Read more
General Knowledge
Measuring Equipotential Bonding
13. May 2026
Measuring equipotential bonding is essential for verifying low-resistance, continuous connections between conductive parts. This article explains equipotential bonding, relevant standards, typical measurement[...]
Read more
General Knowledge
Insulation Resistance and Insulation Measurement
30. April 2026
Insulation measurement helps assess the safety and condition of electrical installations. This article explains insulation resistance measurement, relevant limits, test voltages and practical interpretation[...]
Read more
Webinar
»PQMobil« Webinar: Power Quality Analysis in Public & Industrial Power Grids with A. Eberle PQ-Boxes - Part 4
27. April 2026
Webinar recording from 2026-04-15: »PQMobil - Power Quality Analysis in Public & Industrial Power Grids – Part 4«. [...]
Read more
Blogpost
A. Eberle and Bregal Unternehmerkapital enter into a growth partnership
14. April 2026
A. Eberle and Bregal enter into a growth partnership. The partnership with BU is intended to accelerate A. Eberle’s international expansion, innovation and technological advancement.[...]
Read more
General Knowledge
Clamp Meter - Contactless Current Measurement in Grids and Electrical Installations
30. March 2026
A clamp meter enables fast, non-invasive current measurement in AC and DC systems and supports troubleshooting, commissioning, and temporary load analysis in grid and industrial applications.[...]
Read more
Webinar
»PQ-Box ONE« Webinar: The New Single-Phase Power Quality Analyser for Measurements
12. March 2026
Webinar recording from 2026-02-25: »PQ-Box ONE« - The New Single-Phase Power Quality Analyser for Measurements [...]
Read more
General Knowledge
Measuring Harmonics: Detecting Disturbances in Buildings
6. March 2026
Harmonic distortion and supraharmonics can cause flicker, nuisance tripping and device malfunctions in modern buildings. This article explains how to measure harmonics at the socket outlet and interpret[...]
Read more
Blogpost
Power Quality Monitoring for Electrical Contractors - Mobile Network Quality Measurement with the PQ-Box ONE
2. March 2026
How a portable power quality analyzer like the PQ-Box ONE helps electrical professionals identify voltage disturbances, improve documentation and make reliable technical decisions.[...]
Read more
Blogpost
Short video presentation »PQ-Box ONE«
15. January 2026
Ahead of the official launch on February 25, 2026, we are releasing a short video about the new »PQ-Box ONE« that provides an initial overview of the key features of the new PQ measuring device.[...]
Read more
Blogpost
Power Quality Monitoring: Risks of Poor Power Quality
18. December 2025
Power quality monitoring translates “invisible” disturbances into measurable causes and KPI impacts. This guide explains common power-quality events and a practical workflow to measure, evaluate and[...]
Read more
Webinar
»Cyber Security« Webinar: A Challenge for European Energy Companies
3. December 2025
Webinar recording from 2025-11-26: »Cyber Security« - A Challenge for European Energy Companies[...]
Read more
Blogpost
A. Eberle at the Schwabach City Run 2025
24. November 2025
A. Eberle was represented by 37 participants at the 2025 Schwabach City Run, setting a new internal record for participation. Particularly noteworthy is Benjamin Rentsch's first place in the M 35 40 age[...]
Read more
Training Video
»PQMobil« Training Video 8: Setting up remote access for the PQ-Box
21. November 2025
This video shows how to configure a PQ-Box remotely via Wi-Fi, LAN, network, and the Internet using a VPN tunnel, view live data, and transfer measurement data. Enjoy the video.[...]
Read more
General Knowledge
Total Harmonic Distortion (THD) in Low Voltage Networks
20. November 2025
This study examines harmonic distortion in modern low-voltage grids, showing real measurement data, key standards (EN 50160, IEC 61000-3-2/-4-30) and practical ways to reduce THD in applications such as[...]
Read more
Special Publication
Power Quality Monitoring in Buildings - A Key Factor in Modern Building Design
12. November 2025
Discover how Power Quality Monitoring in Buildings improves reliability, efficiency and grid stability. Learn more in our technical article.[...]
Read more
Special Publication
Continuous Power Quality Monitoring in the Jupiter Data Centre - Voltage Quality at Exascale Level
5. November 2025
Read more
