Bluetooth
TOMZN Bluetooth Smart Timer Switch 85-265VAC 10A 30A EasyCon Countdown Loop Timing
85-265VAC
10A / 30A
28 Groups
Engineered DIN Rail Energy Meters, Smart Timers & Switching Instruments
Direct from our 5,700 m² Wenzhou production lines: high-precision DIN rail mounted kilowatt-hour meters, programmable multi-tariff control instruments, and Bluetooth/WiFi smart communication modules with full CE certification.
7-Day Programmable
TOMZN DIN Rail Single Phase Weekly 7 Days Programmable Digital TIME SWITCH Relay AC 220V 16A
DIN Rail 35mm
Weekly Cycle
16A Rated
1NO + 1NC
TOMZN 1NO 1NC DIN Rail Single Phase Weekly Programmable Relay AC 220V 24V 48V 16A
Dual Output Contact
Multi-Voltage
LCD Backlight
40A High Power
TOS6-40 Bluetooth Time Control Switch 35mm DIN Rail Wall-Mounted AC85-265V 40A
40A Heavy Load
App Control
Loop Timing
63A Heavy Duty
TOMZN TOS7-B Bluetooth Smart Timer Switch 40A 63A 85-265V EasyCon Remote Control
40A / 63A Direct
EasyCon Cloud
CE Certified
10-in-1 Relay
TORT7 Series 10-in-1 Multi-function Delay Timer Relay 0.1S-10D Pulse Cycler
10 Operating Modes
0.1s to 10 Days
Industrial Grade
IoT Smart Meter
TOB9e-63M WiFi Smart DIN Rail Energy Meter & Circuit Breaker with kWh Telemetry
Class 1.0 kWh
WiFi eWeLink / Tuya
Current Limit
Multi-Metric
Modular DIN Rail Digital AC/DC Multi-Parameter Voltage, Current & Watt-Hour Meter
V / A / kW / kWh / PF
Pulse Output S0
CE Certified
24+
Years Manufacturing Experience
5,700 m²
TÜV Rheinland Audited Facility
92
Skilled Technical Specialists
100+
Global Export Destinations
Technical Whitepaper · System Architecture
1. Engineering Deep-Dive: CE Compliance Standards for DIN Rail Energy Meters
In low-voltage electrical distribution panels, DIN rail meters function as the authoritative measurement instruments for sub-billing, energy auditing, renewable generation accounting, and automated demand-response management. Sourcing from genuine original equipment manufacturers (OEMs) requires a rigorous understanding of the difference between superficial self-declaration CE markings and complete conformity according to European harmonized electromagnetic compatibility (EMC 2014/30/EU), low-voltage electrical safety (LVD 2014/35/EU), and measuring instrument directives (MID 2014/32/EU).
Critical Compliance Benchmark: For commercial sub-metering, legal billing in EU member territories mandates compliance with EN 50470-1 (General requirements, tests, and test conditions) and EN 50470-3 (Static meters for active energy - Classes A, B, and C). For general industrial monitoring, smart building sub-metering, and export outside the EU jurisdiction, adherence to IEC 62053-21 (Static active energy meters, Class 1 and Class 2) and IEC 62053-22 (Static active energy meters, Class 0.2s and Class 0.5s) remains the benchmark metric for accuracy and insulation coordination.
As an established manufacturer based in Huabei Village, Liushi Town, Wenzhou—China's low-voltage capital—Zhejiang TMB Electric Co., Ltd. builds internal transformer coils, manganese-copper shunt measurement sensors, and optical galvanic isolation circuits strictly according to these internationally unified standards. Every meter leaving our automated calibration bench is tested across nominal voltage variations (±20%), frequency shifts (45 Hz to 65 Hz), and extreme harmonic distortion profiles (THD up to 40%).
| Meter Classification | Reference Standards | Accuracy Limits (±) | Typical Measurement Topologies | Target Installation Environments |
|---|---|---|---|---|
| Class 1.0 (Class B MID) | EN 50470-3 / IEC 62053-21 | ±1.0% across 0.05 Ib to Imax | Direct Shunt or Hall-Effect Sensor | Sub-tenant billing, EV chargers, Light Industrial Panels |
| Class 0.5s (Class C MID) | EN 50470-3 / IEC 62053-22 | ±0.5% (Accredited at 0.01 In) | 5A / 1A Precision Current Transformers | Industrial switchboards, Solar PV Plants, Substations |
| Multi-Tariff Smart Meter | IEC 62056 (DLMS/COSEM) | ±1.0% active / ±2.0% reactive | Microcontroller RTC (Real-Time Clock) | Time-of-Use (TOU) tariffs, Peak shaving automation |
| Bidirectional PV Meter | IEC 62053-23 / CE EMC | ±1.0% Import & Export | Dual-quadrant active energy integration | Solar Hybrid Inverters, Battery Energy Storage (BESS) |
In addition to active energy (kWh), advanced OEM DIN rail meters integrate high-speed digital signal processors (DSP) calculating root-mean-square (True RMS) line voltages, load currents, active power (kW), reactive power (kvar), apparent power (kVA), power factor (PF), and power frequency (Hz). This high-density data telemetry is transmitted seamlessly via isolated RS485 Modbus RTU, M-Bus, or short-range wireless channels (Bluetooth Low Energy and 2.4 GHz WiFi), empowering facility operators to pinpoint harmonic anomalies and phase imbalances before they escalate into breaker tripping or equipment overheating.
Market Intelligence · 2026–2030 Horizon
2. Future Procurement Trends in the Global DIN Rail Meter Sector
Procurement teams, panel builders, and EPC electrical contractors across Europe, Southeast Asia, South America, and the Middle East are shifting away from standalone electromechanical registers toward unified, connected IoT metering modules. Based on continuous telemetry from our global distribution network in over 100 countries, four transformative purchasing dynamics define the current market cycle:
Bi-directional Sub-metering for Hybrid BESS
With distributed rooftop solar PV and commercial energy storage surging globally, buyers now universally specify 4-quadrant bi-directional measurement capable of distinguishing grid import from solar export.
Integrated Meter-Breaker Combinations
Enclosure space within 35mm modular distribution boards is at a premium. Procurement now favors compact devices combining Class 1.0 energy metering, over/under voltage protection, and motorized remote tripping in a 2-DIN footprint.
Unified Mesh & Cloud Interoperability
Wholesalers increasingly demand universal wireless interfaces—including Bluetooth EasyCon, Tuya WiFi, Zigbee 3.0, and Matter—allowing frictionless plug-and-play linkage to cloud SCADA, building management systems (BMS), and smartphone applications.
Audited Traceability & Tier-1 OEM Direct Supply
To mitigate supply chain risks, B2B importers are bypassing middlemen to establish direct contractual ties with TÜV-inspected production factories in Liushi that offer rapid custom branding, laser marking, and guaranteed firmware longevity.
Wholesale distributors must calibrate their supply inventories to address Time-of-Use (TOU) tariff structures implemented by utilities. Modern DIN rail meters must feature multi-tariff registers (up to 4 to 8 configurable tariff slots) governed by internal temperature-compensated real-time clocks (RTC) with minimum 10-year lithium backup batteries, guaranteeing that energy accumulated during peak, flat, and off-peak hours is recorded accurately even during prolonged power blackouts.
R&D Roadmap · Hardware & Firmware
3. Next-Generation R&D Directions: How DIN Rail Meters are Evolving
As power electronics infiltrate everyday electrical infrastructure through EV chargers, inverter air conditioners, variable frequency drives, and switching power supplies, current waveforms have become severely non-linear. The technological evolution of DIN rail meters is actively addressing these operational challenges across three critical vector domains:
High-Bandwidth Shunt & Rogowski Sensing
Traditional iron-core current transformers suffer from saturation and phase shifts when exposed to DC magnetic bias or steep current gradients. Next-gen DIN rail designs implement micro-ohm electron-beam welded manganese-copper shunts for direct connection up to 100A, and flexible Rogowski coils for retrofitting industrial high-amperage lines without power interruption.
Edge Computing & Power Quality Analytics
Moving beyond passive kWh registration, firmware in 2026-generation meters incorporates localized mathematical analysis. This includes Fast Fourier Transform (FFT) for tracking up to the 31st harmonic, voltage sag/swell detection within 10ms, and autonomous load shedding driven by programmable internal relay matrices.
Anti-Tamper & Cryptographic Security
Revenue protection remains paramount. Emerging industrial meters feature optical cover-open sensors, reverse-current detection flags, strong magnetic field immunity (tested up to 500mT), and hardware-level AES-128 encryption on RS485 Modbus registers to defend against data spoofing in smart microgrids.
At Zhejiang TMB Electric Co., Ltd., our engineering division is concurrently pioneering thermal simulation modeling for high-current modular terminal blocks. Operating at 63A to 100A continuous current inside crowded distribution enclosures causes thermal dissipation challenges. By using solid tin-plated electrolytic copper terminals with high-tensile steel tightening screws, our designs achieve temperature rise values well below the maximum 60K threshold established in IEC 60947-1, ensuring operational lifespans exceeding 15 years.
Manufacturing Excellence · Liushi, Wenzhou
4. Why Global Tier-1 Importers Partner with Zhejiang TMB Electric Co., Ltd.
Selecting the right OEM partner in China determines your commercial competitiveness, delivery reliability, and warranty exposure. Zhejiang TMB Electric Co., Ltd. is not a broker or trading firm; we operate a dedicated, fully integrated production headquarters in Huabei Village, Liushi Town, Wenzhou City, Zhejiang Province.
TÜV Rheinland On-Site Verified
Our 5,700 m² modern workshop, production lines, test stations, and 92 verified personnel have undergone rigorous on-site audit assessments by TÜV Rheinland. Full inspection reports are available for engineering review prior to order placement.
Liushi Industrial Cluster Synergy
Located in the heart of China's electrical capital, our factory sits within minutes of specialized toolmakers, high-grade flame-retardant PC/ABS molders, and terminal hardware fabricators. This supply chain proximity guarantees ultra-competitive tooling costs and rapid prototype turnaround.
Agile OEM & ODM Customization
We provide comprehensive private labeling: customized laser front-panel printing, proprietary packaging, tailored Modbus register addresses, bespoke firmware timing logic, and pre-assembled distribution boxes matched to your exact project bill-of-materials.
Procurement Due Diligence
5. Frequently Asked Questions by International Electrical Buyers & EPC Engineers
Here are detailed, practical engineering answers to the most common questions raised by electrical contractors, distributors, and panel integrators when specifying CE-certified DIN rail meters and smart timer switches:
What is the practical difference between CE marking and MID certification for DIN rail energy meters? +
CE marking indicates that the meter complies with the essential health, safety, and environmental protection requirements established in the Low Voltage Directive (LVD 2014/35/EU) and Electromagnetic Compatibility Directive (EMC 2014/30/EU). Any product sold within the European Economic Area must carry CE.
However, for applications where the meter is used for legal billing of electrical energy (such as sub-metering apartments, commercial tenants, or EV charging stations where electricity is resold), the meter must additionally comply with the Measuring Instruments Directive (MID 2014/32/EU, Annex MI-003). Non-MID CE meters are completely legal and suitable for internal energy management, solar yield monitoring, operational sub-metering, and export to jurisdictions outside the EU.
Direct-connect (Direct-feed) vs. CT-operated DIN rail meters: How should an engineer choose? +
The decision is primarily dictated by continuous operational current:
• Direct Connection: Generally used for circuits up to 63A, 80A, or 100A. The line conductors pass straight through the meter's internal measurement shunts. This provides the lowest installation cost, requires no secondary wiring or external transformers, and eliminates potential CT phase-reversal mistakes.
• CT-Operated (External Current Transformers): Mandatory for circuits exceeding 100A (common on main distribution switchboards from 125A up to 4000A). The meter measures a 5A or 1A secondary output from external toroidal or split-core current transformers. It also allows retrofit installations without cutting thick busbars or main feeder cables.
• Direct Connection: Generally used for circuits up to 63A, 80A, or 100A. The line conductors pass straight through the meter's internal measurement shunts. This provides the lowest installation cost, requires no secondary wiring or external transformers, and eliminates potential CT phase-reversal mistakes.
• CT-Operated (External Current Transformers): Mandatory for circuits exceeding 100A (common on main distribution switchboards from 125A up to 4000A). The meter measures a 5A or 1A secondary output from external toroidal or split-core current transformers. It also allows retrofit installations without cutting thick busbars or main feeder cables.
Can a single-phase DIN rail energy meter or timer switch operate on both 110V/120V and 220V/230V systems? +
Yes, provided the model features a wide-voltage switching power supply (SMPS). For example, our TOMZN Bluetooth smart timers and modular energy meters are rated for AC 85V–265V universal input. This allows international distributors to stock a single SKU that serves both 110V/120V 60Hz regions (North America, Taiwan, parts of Latin America) and 220V/240V 50Hz regions (Europe, Australia, Asia, Africa). Always verify the voltage range specified on the device nameplate before commissioning.
What are S0 pulse outputs, and how are they used in industrial energy data collection? +
The S0 interface (standardized under DIN EN 62053-31) is a passive, optical-coupler transistor pulse output. Each pulse generated corresponds to a defined quantity of measured energy (typically 1000 imp/kWh or 1600 imp/kWh). A supervisory building automation PLC, data logger, or energy management gateway applies a DC voltage (5V–27V DC) across the S0+ and S0- terminals and counts the pulses. Because it is galvanically isolated and hardware-driven, the S0 output is immune to protocol stack crashes and provides real-time verification of power consumption.
How does Bluetooth Low Energy (BLE) compare with RS485 Modbus for DIN rail timer switch configuration? +
Both protocols serve complementary needs:
• Bluetooth (EasyCon / BLE App): Ideal for localized, convenient commissioning without opening cabinet covers or manipulating small buttons on a 35mm module. Technicians can set 28 groups of weekly schedules, cycle timers, and countdown delays via a smartphone app within a 10-meter line of sight.
• RS485 Modbus RTU: Ideal for hardwired, enterprise-scale installations. It supports daisy-chaining up to 32 or 128 devices over shielded twisted-pair cabling over distances up to 1,200 meters directly into industrial SCADA, inverters, and programmable controllers.
• Bluetooth (EasyCon / BLE App): Ideal for localized, convenient commissioning without opening cabinet covers or manipulating small buttons on a 35mm module. Technicians can set 28 groups of weekly schedules, cycle timers, and countdown delays via a smartphone app within a 10-meter line of sight.
• RS485 Modbus RTU: Ideal for hardwired, enterprise-scale installations. It supports daisy-chaining up to 32 or 128 devices over shielded twisted-pair cabling over distances up to 1,200 meters directly into industrial SCADA, inverters, and programmable controllers.
What is the minimum order quantity (MOQ) and sample lead time for OEM branding? +
To support project prototyping and new distributor evaluation, standard catalog DIN rail meters and timers can be ordered starting from just 1 to 5 pieces. For customized private labeling (custom brand logo laser engraving on the front faceplate and customized instruction manuals), our threshold starts from 100 to 500 units depending on the model. Standard sample units ship within 24–48 hours, while volume OEM container shipments are typically completed in 15 to 25 business days.
Can Zhejiang TMB Electric pre-assemble DIN rail meters into turnkey waterproof enclosures? +
Yes. Beyond supplying discrete components, our factory specializes in complete, pre-wired distribution and combiner box assemblies. We integrate our CE-marked DIN rail meters, AC/DC miniature circuit breakers (MCBs), surge protective devices (SPDs), and dual-power automatic transfer switches (ATS) into IP65/IP66 outdoor polycarbonate enclosures (such as our 5, 8, 12, 15, and 18-way HT series), pre-tested and ready for rapid job-site installation.
How do you guarantee quality consistency across massive volume shipments? +
We adhere to a rigorous 6-stage Quality Control workflow verified by TÜV Rheinland:
1. Incoming Inspection (IQC): Sampling raw copper, silver alloy contacts, and flame-retardant VO-grade polymer granules.
2. Automated SMT Assembly: High-precision placement of precision resistors, capacitors, and microcontrollers.
3. Calibration & Accuracy Verification: Multi-point testing across various power factors (cos φ = 1.0 and cos φ = 0.5 inductive) on automated Class 0.1 test benches.
4. High-Voltage Dielectric Testing: 4kV AC insulation withstand verification between terminals and outer housing.
5. Burn-In Aging: 72-hour elevated-temperature burn-in for electronics.
6. Final Outgoing Audit (OQC): Optical inspection, terminal torque validation, and packaging verification prior to container sealing.
Direct Factory Partnership
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