Meta Description: Discover People Electric’s RM858 series digital power meters. High-accuracy three-phase monitoring, Modbus-RTU communication, LED/LCD display options, and 6 standard panel sizes for industrial, commercial and utility applications with 30-day fast delivery.
As global industries accelerate their digital transformation and energy efficiency initiatives, demand for intelligent power monitoring solutions has grown 38% year-on-year in 2026. Facility managers, system integrators and utility companies are increasingly replacing analog meters with digital alternatives that provide real-time data, remote monitoring and advanced energy management capabilities.
Today, we are proud to introduce our RM858 Series Multi-Function Digital Meters - a comprehensive line of intelligent distribution instruments designed for high accuracy, reliability and cost-effectiveness. With 8 core multi-function models and 12+ single-function variants, the RM858 series delivers complete power monitoring solutions for power systems, industrial plants, public facilities and intelligent buildings worldwide.
⭕️ RM858 Series Overview
The RM858 series is built on the latest microprocessor and digital signal processing technology, adopting a separate channel acquisition method for exceptional measurement accuracy. All meters feature a user-friendly interface, programmable input parameters and easy installation, making them the ideal choice for both new construction and retrofit projects.
All products are designed to meet international industrial standards, with an operating temperature range of -10°C to +50°C and 2kV withstand voltage capability, ensuring reliable performance in even the harshest industrial environments.
⭕️ Core Features & Capabilities
✅️ Comprehensive Power Parameter Measurement
Every RM858 multi-function meter provides complete visibility into your electrical system, measuring all critical parameters in real time:
● Three-phase voltage and current
● Active and reactive power
● Apparent power and power factor
● System frequency
● Active and reactive electric energy (bidirectional measurement)
This comprehensive data allows you to identify energy waste, optimize power usage and reduce operational costs.
✅️ Advanced Communication & Integration
All models come standard with an RS-485 communication interface supporting the Modbus-RTU protocol, enabling seamless integration with:
● Building Management Systems (BMS)
● SCADA systems
● Energy management platforms
● Industrial automation systems
This remote monitoring capability eliminates the need for manual meter reading and allows for real-time fault detection and alerting.
✅️ Flexible Display Options
The RM858 series offers two display options to suit different application needs:
● LED Display (AS3/3S3/9S3/2S3 models): High-brightness red LED display, ideal for high-light environments and long-distance viewing
● LCD Display (ASY3/3SY3/9SY3/2SY3 models): Blue backlight LCD display with text field interface, providing more detailed information and easier operation
✅️ Modular Design & Customization
All meters support optional expansion modules to meet specific project requirements:
● Switching value input/output
● Analog transmitting output (4-20mA)
● Electric energy pulse output (1 or 2 channels)
This modular design allows you to configure exactly the features you need, avoiding unnecessary costs.
✅️ Easy Installation & Maintenance
The RM858 series is available in 6 standard panel sizes to fit any existing electrical panel:
● 45×45mm, 67×67mm, 76×76mm
● 91×91mm, 91×45mm, 111×111mm
All meters feature front panel mounting and screwless terminals, reducing installation time by up to 50% compared to traditional analog meters.
⭕️ Complete Model Selection Guide
✅️ Multi-Function Meters Comparison
Below is a simplified guide to help you select the right RM858 model for your application:
| Model Series | Display Type | Frame Size | Key Features | Best For |
| RM-858E-AS3 | LED | 72×72mm | Basic multi-function, 1 pulse output | Cost-sensitive projects, small panels |
| RM-858E-3S3 | LED | 80×80mm | All AS3 features + 2 pulse outputs | Standard industrial applications |
| RM-858E-9S3 | LED | 96×96mm | All 3S3 features + larger display | Control rooms, easy viewing |
| RM-858E-2S3 | LED | 120×120mm | All 9S3 features + maximum display size | Main switchboards, utility applications |
| RM-858E-ASY3 | LCD | 72×72mm | Basic multi-function, LCD display | Low-light environments, detailed data |
| RM-858E-3SY3 | LCD | 80×80mm | All ASY3 features + 2 pulse outputs | Commercial buildings, offices |
| RM-858E-9SY3 | LCD | 96×96mm | All 3SY3 features + larger display | Data centers, industrial plants |
| RM-858E-2SY3 | LCD | 120×120mm | All 9SY3 features + maximum display size | Power substations, utility monitoring |
✅️ Single-Function Meters
In addition to multi-function meters, the RM858 series includes a complete line of single-function instruments for specialized applications:
● Single-phase AC/DC Ammeters (RM858AI/DI): Measure single-phase current with 0.5% accuracy
● Single-phase AC/DC Voltmeters (RM858AV/DV): Measure single-phase voltage with 0.5% accuracy
● Three-phase Ammeters (RM858I): Measure three-phase current simultaneously
● Three-phase Voltmeters (RM858U): Measure three-phase voltage simultaneously
● Frequency Meters (RM858F): 45-55Hz measurement range, 0.5% accuracy
● Power Factor Meters (RM858PF): 0-1.00 measurement range (leading/lagging)
● Digital Power Meters (RM858P): Measure active power with 1.0% accuracy
All single-function meters are available in the same 6 panel sizes as the multi-function models, ensuring a consistent look across your entire panel.
⭕️ Global Market Applications
The RM858 series is designed to meet the specific needs of different regional markets:
● Europe: Energy monitoring features help comply with EU energy efficiency directives
● North America: Modbus-RTU communication integrates with standard BMS systems
● Middle East: High-temperature operation (-10°C to +50°C) suits desert environments
● Africa: Cost-effective single-function meters support grid modernization projects
● Southeast Asia: Compact size and easy installation fit industrial relocation projects
⭕️ 5 Key Advantages of RM858 Series Meters
✔️ Industry-Leading Accuracy
With a measurement accuracy of 0.5% ±1 digit for voltage and current, the RM858 series provides reliable data for energy billing and efficiency analysis. This accuracy is maintained over the entire operating temperature range, ensuring consistent performance in all environments.
✔️ Complete Product Portfolio
With 8 multi-function models and 12+ single-function variants, the RM858 series offers the most comprehensive range of digital meters in the industry. This allows you to source all your power monitoring needs from a single supplier, simplifying procurement and reducing inventory costs.
✔️ Industrial-Grade Reliability
All meters undergo rigorous testing including 2kV withstand voltage, EMC testing and temperature cycling. They feature a rugged plastic enclosure and conformal coated circuit boards, providing protection against dust, moisture and vibration.
✔️ Easy Integration
The standard Modbus-RTU protocol ensures compatibility with virtually all industrial control systems. We provide free communication protocol documentation and sample code to simplify integration for system integrators.
✔️ Exceptional Value
The RM858 series delivers premium performance at a competitive price point, offering up to 40% cost savings compared to equivalent European and American brands. This makes it the ideal choice for both large-scale projects and small installations.
⭕️ Why Choose People Electric for Digital Meters
● Fast Delivery: Standard RM858 series units are delivered in just 30 days, 2-3 times faster than competitors
● Flexible MOQs: We offer MOQs starting from 10 units for standard models, making it easy to test the market
● Customization Support: We can customize display content, communication protocols and labeling for bulk orders
● Global Technical Support: Our international team provides 24/7 technical support and product training
● Proven Quality: All products are manufactured in our ISO 9001 certified facilities, with a 99.8% product pass rate
⭕️ Looking Ahead: Powering the Smart Grid Revolution
As the world transitions to a more digital and energy-efficient future, intelligent power monitoring will become an essential component of every electrical system. The RM858 series is designed to lead this transition, providing the accurate, reliable data needed to optimize energy usage, reduce costs and improve system reliability.
Whether you are upgrading an existing industrial plant, building a new commercial facility or modernizing a utility grid, the RM858 series has the right solution for you.
★ Ready to Upgrade Your Power Monitoring System?
Contact our international business team today to request a detailed RM858 series datasheet, get a customized quotation, or discuss bulk order and OEM/ODM opportunities. We also offer free technical consultation to help you select the right meters for your specific application.
Post time: Jun-08-2026
