4-20mA, Modbus Protocol, GPRS Remote Data Collector
SM626H-D All-Netcom Data Collector is a high-tech product supporting multiple communication protocols.
SONGMAO Electronic Co., Ltd.
Jiaxing Songmao Electronics Co., Ltd. was established in 2007. It has always been driven by technological innovation, deeply engaged in the field of industrial automation, and gradually developed into a high-tech enterprise integrating R&D, production and sales.
The company focuses on the independent research and development of core technologies such as HART protocol communication products and data collectors. Through continuous technological breakthroughs and market expansion, it has established a leading position in the industry.
With over 18 years of industry experience, Songmao Electronics serves clients across 40+ countries worldwide, offering reliable, precision-engineered solutions for industries including oil & gas, heating, natural gas, water utilities, and environmental protection. Our 1,073 ㎡ office and R&D facility supports a full in-house development cycle — from concept to certified product.
Songmao Electronics offers a comprehensive range of HART protocol communication converters and multi-channel data collectors engineered for precision industrial automation applications.
SM626H-D All-Netcom Data Collector is a high-tech product supporting multiple communication protocols.
The SM100-HHE Series HART Intelligent Transmitter is a precision industrial protocol converter.
A high-tech device that combines RS232/RS485 communication with HART protocol conversion.
SM100-A(B) HART SMART converter created by combining advanced communication technologies.
SM701-D multivariable current output converter is a high-performance industrial solution.
The SM700-T-1(II) converter is a multi-function serial communication device.
SM700-M smart converter developed using advanced embedded technology for industrial automation.
The SM700-A(B) Intelligent Multiplexer supports multiple Modbus protocol configurations.
SM626H-D All-Netcom Data Collector supporting GPRS and 4G communication protocols.
Industrial-grade HART data collector with 4-20mA to RS485 conversion capability.
Next-generation HART data collector with wireless 4G and GPRS remote transmission.
High-density 32-channel HART data collector for large-scale industrial monitoring systems.
16-channel HART gateway enabling centralized data acquisition from multiple field devices.
Compact 8-channel HART data collector with HART to Modbus protocol conversion.
Reliable 8-channel HART gateway designed for DCS/PLC integration in process industries.
SM100-TCP HART acquisition module bridges field instruments to Ethernet TCP/IP networks.
With 18+ years of dedicated R&D expertise and certified production processes, we deliver HART communication solutions that engineers and procurement teams trust worldwide.
Since 2007, our in-house engineering team has focused exclusively on HART communication and industrial data acquisition technologies — delivering verified, production-ready solutions backed by decades of field experience.
Our products are tested and certified to meet international standards including CE, RoHS and industry-specific compliance, ensuring seamless integration into regulated environments globally.
From oil fields in the Middle East to water treatment plants in Europe, Songmao products are trusted in 40+ countries — supported by a responsive global distribution and after-sales network.
From component sourcing through PCB assembly, firmware development, testing, and packaging — all steps occur under one roof, ensuring end-to-end quality traceability and faster lead times.
We partner with system integrators and OEM clients to develop custom protocol converters and data collectors, tailored to specific interface requirements, housing standards, and communication architectures.
Our multilingual technical team provides pre-sales configuration guidance, integration documentation, and post-sales troubleshooting — ensuring your project runs on schedule from commissioning to steady-state operation.
The company focuses on the independent research and development of core technologies such as HART protocol communication products and data collectors. Through continuous technological breakthroughs and market expansion, it has established a leading position in the industry.
Every Songmao Electronics product goes through a rigorous multi-stage quality control process — from component inspection to final performance verification — ensuring that each unit meets or exceeds international standards before it reaches your facility.
All electronic components — including ICs, resistors, capacitors, and communication chips — are verified against specifications using automated optical inspection (AOI) and sample-batch electrical testing. Only components that pass 100% traceability checks enter the production floor.
Surface-mount technology (SMT) lines apply solder paste and mount components with sub-millimeter precision. Each PCB is reflow-soldered and visually verified post-assembly.
Proprietary firmware is flashed to each device using in-circuit programming fixtures. HART protocol response, Modbus registers, signal output accuracy, and I/O behavior are validated against design specifications.
Units undergo temperature cycling, humidity exposure, and EMC pre-compliance testing to simulate field conditions — identifying marginal components before products reach customers.
Signal output accuracy — including 4-20mA current loop and digital protocol responses — is calibrated against NIST-traceable references to guarantee measurement integrity across the full operating range.
Each device passes a final audit covering visual inspection, label verification, accessories check, and user documentation. Products are packed in anti-static, moisture-barrier packaging rated for international air and sea freight.
Songmao Electronics holds multiple industry certifications covering quality management, product safety, electromagnetic compatibility, and intellectual property — demonstrating our commitment to technical excellence and regulatory compliance across global markets.
From our manufacturing base in Jiaxing, China, Songmao Electronics serves industrial clients across 40+ countries with a resilient supply chain, technical support infrastructure, and certified distribution partners on every continent.
Engineers and procurement managers from oil & gas, utilities, and process industries trust Songmao Electronics for reliable HART communication solutions — here's what they say about working with us.
The SM100-HHE HART Intelligent Transmitter integrated flawlessly with our existing Modbus infrastructure in our refinery upgrade project. Technical support was excellent and delivery was on time. Will definitely order again.
We've sourced SM700 series converters from Songmao for our district heating control projects across three European cities. Their consistency in quality and responsive after-sales support sets them apart from other suppliers.
The 32-channel HART data collector has dramatically simplified our SCADA integration for a large water metering network. Documentation is thorough, protocol behavior is exactly as specified, and calibration accuracy is excellent.
Stay up to date with the latest insights on Modbus communication protocols, HART technology, and industrial automation best practices — published by the Songmao Electronics engineering and applications team.
News
MODBUS TCP (Transmission Control Protocol) is a widely used serial communication protocol in industrial automation, intelligent instruments, PLC control systems, and IoT data collection environments. This guide covers step-by-step connection procedures.
News
In industrial automation, intelligent instruments, PLC control systems, and IoT data collection, Modbus remains the most widely deployed protocol. This complete analysis covers function codes, frame structures, and implementation best practices.
A practical guide to connecting HART modems for field device communication. Covers wiring configurations, multi-drop setups, and compatibility with common HART host interfaces and handheld communicators.
Connect with Songmao Electronics' engineering team to discuss your HART communication, protocol conversion, or data acquisition requirements. From specification to delivery — we're your trusted partner.
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