If you manage energy across commercial, industrial or utility sites, you need a meter that does more than just count kilowatt-hours. You need one device that’s accurate, communications-ready, expandable and powerful enough to deliver power quality insight without complicating your panel. That’s exactly where SATEC’s PM135EH shines.
The PM135EH is the “Energy + Harmonics” model in SATEC’s PM135 family. A compact, modular, three-phase meter with serious capabilities for revenue metering, power quality analysis and SCADA integration.
It combines accuracy, flexible I/O, rich comms and built-in visualisation to help engineers, facility managers and integrators move from raw data to clear operational action.
What the PM135EH Multi-function Power Meter does
At its core, the PM135EH measures all the electrical fundamentals – voltage, current (including neutral), power, energy, power factor, frequency and unbalance – at Class 0.5/0.5S accuracy per Australian/IEC standards, with an available Class 0.2 option for higher-precision applications. That means dependable numbers you can trust for billing and performance tracking.
Where the EH variant goes further is harmonic analysis: Total Harmonic Distortion (THD), Total Demand Distortion (TDD), K-Factor and individual voltage/current harmonic spectrum and angles up to the 40th order.
In practice, that gives you enough depth to diagnose Power Quality (PQ) issues like overheating transformers, nuisance trips or badly behaving Variable Frequency Drives (VFD), without a separate analyser.
Key features you’ll actually use
Accurate, revenue-ready metering
Accuracy: Class 0.5/0.5S per AS 62053-22; Class 0.2 as an option. Ideal for cost allocation and sub-billing.
Energy/Tariffs: Time-of-Use (TOU) with 4 totalisation and tariff registers × 8 tariffs, 4 seasons × 4 day types, up to 8 tariff changes per day. Can be added as an option. Great for complex energy contracts.
Built-in power quality and diagnostics
Harmonic analyser: THD, TDD, K-Factor plus individual harmonics up to 40th – no add-on analyser required.
Waveform capture: Real-time scope on LCD display or via SATEC PAS software for fast troubleshooting.
Harmonics Spectrum: Real-time scope on LCD display or via SATEC PAS software.
Vector Analysis: Real-time scope on LCD display or via SATEC PAS software.
Event & data logging: Non-volatile memory for timestamped events, periodic data logs, and daily energy/demand profiles
Communications that fit your system—not the other way around
Standard: RS-485 onboard.
Optional: Ethernet (10/100Base-T), multipurpose RS-232/422/485, PROFIBUS and 4G cellular is also available.
Protocols: Open and interoperable—Modbus RTU/TCP, DNP3, IEC 60870-5-101/104, plus ASCII. This breadth makes it simple to drop the PM135EH into existing SCADA, BMS, or EMS architectures.
Modular I/O to match your application
Mix and match plug-in modules: 4DI/2DO, 12DI/4RO (with extra comm port option), 8DI, and 4AO (with multiple current ranges).
Built-in programmable logic controller (PLC-lite) with 16 setpoints and 1-cycle response enables local alarms, shedding, or control actions without a PLC.
Installer- and operator-friendly hardware
LCD display with LED load bar for quick, at-a-glance load visibility.
Dual mounting (92×92 mm square or 4″ round) to suit legacy cutouts.
Direct voltage up to 690 V AC, and flexible current inputs: 1 A, 5 A, and 40 mA for SATEC HACS CTs (including a special 5 A input for clip-on HACS in retrofit work).
Software support
PAS (free) for configuration, real-time monitoring, waveform/harmonic visualisation, and data retrieval.
ExpertPower (subscription) for web-based energy management and reporting.
Benefits that show up in your KPIs
Lower integration risk, faster commissioning
With standard RS-485 and common protocols (Modbus/DNP3/IEC-60870-5-101/104), the PM135EH plugs into most SCADA/BMS ecosystems with minimal engineering. Optional Ethernet, cellular, and PROFIBUS expand your playbook for remote or segmented networks.
Fewer boxes in the panel
Because the EH model delivers harmonics, logging, waveform viewing on the LCD display or via PAS and modular I/O in one device, you can reduce separate analysers, transducers, and alarm relays – saving space, wiring time, and BOM cost.
Actionable power quality insight
THD/TDD/K-Factor plus 40th-order spectra help you identify distortion sources, validate mitigation (filters, line reactors), and avoid hidden losses and overheating—turning PQ from a guess into an engineering decision.
Revenue-grade clarity
TOU, daily energy logs, and secure password protection provide the auditability and confidence you need for internal cost allocation or sub-billing scenarios.
Future-proof flexibility
As your site evolves—adding DER, EV loads, or new reporting—drop-in modules (I/O, analog outputs, second comms port) let the PM135EH keep pace without a meter swap.
Where the PM135EH fits best (use cases)
Commercial Campuses and Portfolios
Use the PM135EH at main incomers and key tenant feeders to combine accurate billing, tariff handling, and ongoing PQ oversight. Harmonic views up to the 40th order help facilities teams pinpoint troublesome loads and optimize power factor correction or filter placement.
Industrial Plants
Monitor MCCs and critical process lines. The built-in logic with 1-cycle response can drive local alarms or trip signals via relay outputs when thresholds are exceeded (e.g., under-voltage, over-current, PF alarms), while waveform “scope mode” speeds root-cause analysis after an event.
Data Centres
Combine revenue-grade energy metering with harmonics tracking to protect transformer and UPS health. Optional Ethernet and Modbus TCP integrate easily with DCIM platforms, while granular logs support SLA reporting.
Utilities and Substations
Leverage DNP3/IEC-60870-5-101/104 for seamless SCADA integration. Use threshold-based setpoints and digital I/O for simple automation or alarming close to the process.
Retrofits and Expansions
The dual mounting options plus HACS input support (including clip-on 5 A for existing CT secondaries) make it retrofit-friendly, cutting downtime and installation complexity.
Why choose PM135EH over separate meters + analysers?
Simplicity and total cost of ownership. One compact device provides billing-grade metering, deep PQ analytics, rich logging, and flexible I/O/communications.
That reduces panel real estate, design effort, stock SKUs, and points of failure—while giving you reliable, standards-based data across energy and power quality domains.
Contact our team to discuss how the PM135EH multi-function power meter can help you.
