TOU Energy Meter & Multi-Functional Smart Power Meter


SATEC EM133 is a Smart DIN Rail TOU Energy Meter, featuring  16×2-character LCD display, 2 Digital Inputs, 1 Digital Output, IR (Infra-Red), battery backed up real time clock (RTC) and up to 8MB memory for data logging.


The EM133 can serve any application from residential energy metering, through industrial energy and harmonic analysis through utility comprehensive substation automation. It provides multifunctional 3‑phase power metering, revenue metering and basic power quality information. The EM133 features an internal real time clock (RTC), battery backup and onboard non-volatile memory for event and data logging. The device includes 16 set points and 4 counters that operate the built in 2 DI/ 1RO or the various analog and digital I/O add-ons.

The EM133 offers a wide range of network configurations and versatile voltage and current connections: 57 to 400V AC, up to 100A direct current measurement, connection of standard CTs (1A, 5A) and a wide range of remote HACS – High Accuracy Current Sensors (split or solid cores).


  • True RMS, volts, amps, power, power factor, neutral current, voltage and current unbalance, frequency
  • Ampere/Volt demand meter
  • 25, 50, 60 and 400 Hz measurements
  • 128 samples per cycle
  • Accuracy Class 0.5S
  • Four-quadrant active and reactive energy poly-phase static meter
  • Three-phase total and per phase energy measurements; active, reactive and apparent energy counters
  • Time-of-Use, 4 totalization and tariff energy/demand registers x 8 tariffs, 4 seasons x 4 types of days, 8 tariff changes per day
  • Voltage and current THD, TDD and K-Factor, up to 40th order harmonic
  • Voltage and current harmonic spectrum and angles
  • Standard 2-wire RS-485 communication port
  • Built-in IR communication port
  • Supports, Modbus RTU, Modbus ASCII, DNP 3.0, IEC 60870-5-101, -104 Communication protocols

 For more information about the EM133, please visit Satec or contact EPSE


Founded in 1987, SATEC researches, develops, and manufactures energy management solutions for energy utilities and consumers. The company’s devices include basic power meters and high-performance grid meters with advanced power quality capabilities. Its solutions are designed to enable energy utilities to take timely corrective actions and help energy consumers prevent equipment failures. SATEC exports to more than 40 countries throughout Europe, North and South America, Asia, and Africa. All SATEC devices comply with world-acknowledged regulations and are supported by the company’s energy management software.