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SFM118 Series Single-Phase Multifunction Meter from China Suppliers and Factory for Accurate Power Monitoring

Expanded Technical Description: SFM118 Series Single-Phase DIN-Rail Multifunctional Meter

The SFM118 series single-phase DIN-rail multifunctional meter is specifically designed for optimal performance in single-phase two-wire (1P2W) power grid systems. As a premier product from leading China suppliers, this compact DIN-rail mounted device is engineered for precision in measuring essential power parameters, making it the perfect solution for real-time power monitoring in residential, commercial, and light industrial applications. Manufactured in a reliable factory, the SFM118 ensures high-quality performance and durability, catering to the needs of modern electrical monitoring solutions.

Product Details

Product Description

At its core, the SFM118 series meter excels in accurately measuring key electrical characteristics, including:

RMS Voltage & RMS Current

Active, Reactive & Apparent Power

Grid Frequency

Import & Export Active / Reactive Energy

Flexible Data Communication & Remote Management Beyond its robust local measurement and display functions, the SFM118 series meter is designed with flexible data communication capabilities. Monitoring data can be seamlessly transmitted to host computers, PLCs, and other industrial control equipment — enabling centralized measurement and control systems that support remote data acquisition, real-time load analysis, energy consumption statistics, and automated power management.

Technical Parameters

Parameters		Index
Input	Voltage	Voltage (Un): 230VAC
		Voltage range: 176–276VAC
	Current	Directly connected: 0.25–5(45)A \| Overcurrent withstand: 30I_max for 0.01s
	Frequency	50Hz
	Wiring	Connecting capacity: from 0.5 to 10 mm²
Display		Display: LCD with white back-light Max reading: 99999.9 kWh
Accuracy		Active energy: Class 1, Class B
Output	Communication	Interface: RS485 Protocol: Modbus RTU
	Pulse	Pulse constant: 1000 imp/kWh
Power Consumption		< 2W / 25VA
Withstand	AC Voltage	4kV / 1 min
	DC Impulse	6kV – 1.2µs waveform
Climate Environment	Temperature	Operating temperature: -25°C ~ +55°C
		Storage temperature: -40°C ~ +70°C
	Humidity	≤ 95% non-condensing, no corrosive gas
	Altitude	≤ 2000m
Mechanical Environment		M1
Electromagnetic Environment		E2

Frequently Asked Questions

What types of electrical parameters can the SFM118 series meter measure?

The SFM118 series meter is capable of measuring RMS voltage, RMS current, active power, reactive power, apparent power, grid frequency, and both import (consumed) and export (fed-back) active and reactive energy — providing comprehensive electrical monitoring in a single device.

What communication interface and protocol does the SFM118 meter support?

The SFM118 series meter features an RS485 communication interface and supports the Modbus RTU protocol. This allows seamless integration with host computers, PLCs, and other industrial control equipment for centralized data management and remote monitoring.

What is the accuracy class of the SFM118 series meter?

The SFM118 series meter achieves Class 1 and Class B accuracy for active energy measurement, meeting international standards for precision energy metering in commercial and industrial applications.

What is the operating temperature range of the SFM118 meter?

The SFM118 series meter is designed to operate reliably in temperatures ranging from -25°C to +55°C, with a storage temperature range of -40°C to +70°C, making it suitable for a wide variety of environmental conditions.

Does the SFM118 meter support pulse output, and what is the pulse constant?

Yes, the SFM118 series meter supports pulse output with a pulse constant of 1000 impulses per kWh (1000 imp/kWh), enabling easy integration with external energy management systems and data loggers.

What voltage and current input specifications does the SFM118 meter support?

The SFM118 meter supports a rated voltage (Un) of 230VAC with an operating range of 176–276VAC. For current, it supports direct connection from 0.25–5(45)A, with an overcurrent withstand capability of 30I_max for 0.01 seconds, ensuring robust performance under surge conditions.