Data Transmission Unit
Product ID: TD-DTU-PLUS
TD-DTU-PLUS 4G Data Transfer Unit is a device designed for data acquisition and remote transmission.It features a built-in high-capacity battery, eliminating the need for external power supply, and addresses the challenge of data acquisition and transmission in scenarios where power supply is unavailable on-site.
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Battery
DC : 9-36VDC； Battery : 27000 Mah
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Wireless
4G/Bluetooth
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Baud Rate
300-115200bps
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Temperature
-20～+60℃
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Features
Product Introduction
TD-DTU-PLUS is a device designed for data acquisition and remote transmission.It features a built-in high-capacity battery, eliminating the need for external power supply, and addresses the challenge of data acquisition and transmission in scenarios where power supply is unavailable on-site.Equipped with a 4G Cat-1 wireless communication module, it supports 2G+4G networks and GNSS positioning.The built-in wireless communication module adopts a modular design based on the Mini-PCIE standard interface, offering a variety of modules with different frequency bands to adapt to wireless networks in various countries and regions worldwide, enabling remote data acquisition and transmission.
Strong Compatibility
Supports multiple photoelectric ports and adapts to various communication interfaces of on-site meters.
Available Range
Supports multiple protocol configurations for plug-and-play use (no development required). It also enables the expansion of on-site applications, including remote control and environmental data collection.
Multi-Mode All Network Connectivity
As different countries use various communication cards, users can freely choose 2G/3G/4G and different data packets. Tespro's communication cards are suitable for global use.
Supported Protocols And Methods
Leave the protocol problem to us, so you can just go and use it with ease. What's more, it supports local storage: data is read first, saved first, and then uploaded once the network is available.
Tech Specs
Metering Equipment Technical Data
| Category | Items | Features |
| Basic Information | Power Supply | DC : 9-36VDC; Battery : 27000 Mah |
| Indicator Lights | Power/Network/Communication/Bluetooth | |
| Region/Channel | Global | |
| Reference Dimensions | 41mm*95mm*103mm | |
| Frequency Band Information | LTE-FDD | B1/2/3/4/5/7/8/12/13/18/19/20/25/26/28 |
| LTE-TDD | B38/39/40/41 | |
| WCDMA | B1/2/4/5/6/8/19 | |
| GSM/EDGE | B2/B3/5/8 | |
| GNSS | GPS,GLONASS,BDS,Galileo,QZSS(Optional) | |
| Data Information | LTE-FDD | Max 10 Mbps(Downlink)/5 Mbps(Uplink) |
| LTE-TDD | Max 8.96 Mbps(Downlink)/3.1 Mbps(Uplink) | |
| WCDMA | Max 384 kbps(Downlink)/384 kbps(Uplink) | |
| EDGE | Max 296 kbps(Downlink)/236.8 kbps(Uplink) | |
| GPRS | Max 107 kbps(Downlink)/85.6 kbps(Uplink) | |
| Output Power | LTE-FDD | Class 3(23 dBm±2 dB) |
| LTE-TDD | Class 3(23 dBm±2 dB) | |
| WCDMA | Class 3(24 dBm+1/-3 dB) | |
| GSM850 | Class 4(33 dBm±2 dB) | |
| Serial Port Parameters | Number of Serial Ports | 1×RS232,1×RS485(Can operate simultaneously) |
| Serial Port Pins | RS232-Terminal(V/TX/RX/GND),RS232-DB9(2-RX/3-TX/5-GND),RS485-Terminal(A/B/G) | |
| Data Bits | 7,8 | |
| Stop Bits | 1,2 | |
| Parity Bits | NONE,ODD,EVEN | |
| Baud Rate | 300-115200bps | |
| Interface & Others | SIM Card Slot | External SIM Card Slot,Standard Mini SIM |
| Bluetooth Antenna | 1 Bluetooth antenna, SMA male thread with inner hole | |
| 4G Antenna | 1 4G antenna, SMA male thread with inner hole | |
| Reload Button | Button Hole | |
| Power Socket | DC socket | |
| Network & Protocols | Network Protocols | TCP/UDP/MQTT |
| Working Modes | TCP Client,UDP Client,MQTT Client | |
| SSL Encryption | Supported | |
| MQTT Transmission | Supported | |
| DUP Transmission | Supported | |
| Temperature & Humidity Range | Operating Temperature | -20～+60℃ |
| Operating Humidity | 5%~95%(Non-condensing) | |
| Storage Temperature | -20～+60℃ | |
| Storage Humidity | 5%~95%(Non-condensing) | |
| Reliability | Reverse Polarity Protection | Supported |
| Overvoltage &Overcurrent Protection | Supported | |
| Lightning Protection | Supported | |
| Surge Protection | Supported |
Product Dimensions
Explore our Solutions
Smart Metering Communication Solutions
Tespro’s DTU-PLUS, a compact data transfer unit, collected and transmitted metering data via 4G or Ethernet using MQTT/HTTP protocols. It supported cloud integration, remote configuration, and fault alerts.
Case
Product Case
A rural utility company struggled with collecting and transmitting energy data from scattered water, electricity, and gas meters across remote villages and farmland. These meters were installed in areas with no access to grid power, and manual data collection required time-consuming technician trips—leading to delayed usage monitoring and billing inaccuracies. Existing wireless transmitters relied on external power sources, making them impractical for off-grid locations.
Tespro’s TD-DTU-PLUS data acquisition and transmission device addressed this critical gap with its built-in 27000mAh high-capacity battery, eliminating the need for external power supply. It connects seamlessly to meters via RS232/RS485 serial ports, capturing energy data locally before transmitting it to the utility’s cloud platform using 4G Cat-1 (or 2G fallback) networks—ensuring stable connectivity even in rural areas.
The device’s GNSS positioning feature added visibility, letting the utility track the location of each meter and verify data source accuracy. With support for TCP/UDP/MQTT protocols, it integrated smoothly with the company’s existing backend system, while its compact design made it durable for outdoor use.
For off-grid energy meters in remote locations, the TD-DTU-PLUS delivered uninterrupted data transmission without relying on grid power. It eliminated costly and time-consuming manual patrols, ensuring the utility had real-time access to energy usage data for efficient resource management and accurate billing.
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Frequently Asked Questions
To help you better understand our products' performance, compatibility, and usage, we’ve compiled answers to commonly asked questions. If your inquiry isn’t listed below, feel free to contact us directly for further assistance.
Contact Us
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Are these products compatible with my current system?
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Most products support cross-platform protocols and work with Android, iOS, and Windows systems. Please refer to the product specifications for exact compatibility.
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What communication methods are supported?
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Most devices support multiple communication modes such as Bluetooth, USB, and Wi-Fi to meet various application needs.
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Do the products offer water and dust protection?
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Yes, most of the products are rated at least IP54, providing resistance against dust and water splashes in industrial environments.
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Can data be transmitted remotely?
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Some models support wireless data transmission via Wi-Fi or 4G/5G networks, enabling real-time upload to cloud platforms or backend systems.
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How are the devices powered?
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Devices typically feature rechargeable batteries with runtimes ranging from 8 to 24 hours, and can be recharged via USB.
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Do you offer product customization?
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Yes, we provide customization options such as protocol support, casing design, and mounting solutions. Please contact us for more details.
