Model: EID041-G01
Sensor Chip: AHT20 (high-precision capacitive)
Communication: RS485, Standard Modbus-RTU protocol
Supply Voltage: DC 5–36V wide-range input
Temperature: −40 to +125℃, accuracy ±0.3℃, resolution 0.1℃
Humidity: 0–100%RH, accuracy ±2%RH, resolution 0.1%RH
Installation: DIN rail (guide rail) + positioning hole, 82×45×28.5 mm
Protection: Three-proof coating (anti-fungal, anti-humidity, anti-salt spray)
Operating Temp: −40 to +85℃ (industrial grade)
Applications: Industrial automation, HVAC monitoring, cold chain, data center, smart agriculture, building management
| Category | Parameter | Value |
| Power Supply | Operating Voltage | DC 5–36V (wide-range) |
| Power Indicator | Green LED | |
| Communication | Interface | RS485 |
| Baud Rate | 4800–115200 bps (8 options) | |
| Protocol | Standard Modbus-RTU | |
| Modbus | Device Address | 1–255 (configurable) |
| Temperature | Sensor Chip | AHT20 |
| Accuracy | ±0.3℃ | |
| Resolution | 0.1℃ | |
| Measurement Range | −40 to +125℃ | |
| Humidity | Sensor Chip | AHT20 |
| Accuracy | ±2%RH | |
| Resolution | 0.1%RH | |
| Measurement Range | 0–100%RH | |
| Power Consumption | Max. Power | 0.1 W |
| Mechanical | Dimensions | 82 × 45 × 28.5 mm (L×W×H) |
| Operating Temp. | −40 to +85℃ | |
| Installation | DIN rail + positioning hole | |
| Default Parameters | Modbus Address | 1 |
| Baud Rate | 9600 bps | |
| Parity | None | |
| Data Bits | 8 | |
| Stop Bits | 1 |
AHT20 High-Precision Sensor — ±0.3℃ / ±2%RH Industrial Accuracy
The EID041-G01 integrates the AHT20 capacitive temperature and humidity sensor, delivering ±0.3℃ temperature accuracy and ±2%RH humidity accuracy across the full −40 to +125℃ measurement range. This exceeds the accuracy of common NTC or DHT-series sensors, making it suitable for demanding industrial applications such as pharmaceutical cold chain, data center environmental monitoring, and precision HVAC control where measurement drift directly impacts process quality.
Standard Modbus-RTU over RS485 — Plug-and-Play with Any PLC or SCADA
The RS485 interface with standard Modbus-RTU protocol (function codes 0x03/0x06) allows direct integration with any PLC, DCS, SCADA, or data acquisition system without custom drivers. Up to 255 devices can share a single RS485 bus (addresses 1–255), and baud rate is selectable from 4800 to 115200 bps. Default parameters (9600 bps, 8N1, address 1) are compatible with most industrial controllers out of the box.
DIN Rail + Three-Proof Enclosure — Industrial-Grade Reliability
The compact 82×45×28.5 mm enclosure snaps onto standard 35 mm DIN rails and also supports positioning hole mounting, fitting directly into existing electrical panels and control cabinets. The housing features three-proof coating (anti-fungal, anti-humidity, anti-salt spray), ensuring long-term reliability in harsh industrial environments including coastal facilities, food processing plants, and outdoor enclosures operating from −40 to +85℃.
Ideal Applications
Frequently Asked Questions
Q: How many EID041-G01 sensors can I connect on a single RS485 bus?
A: Up to 255 devices can share one RS485 bus, each assigned a unique Modbus address (1–255). The default address is 1 and can be changed via Modbus function code 0x06. Ensure total bus cable length does not exceed 1,200 m and use a 120Ω termination resistor at each end for reliable communication.
Q: What is the default Modbus register for reading temperature and humidity?
A: Temperature and humidity data are read using Modbus function code 0x03 (Read Holding Registers). Refer to the EID041-G01 user manual for the exact register addresses. Default communication parameters are: address 1, baud rate 9600 bps, 8 data bits, no parity, 1 stop bit (8N1).
Q: Is the EID041-G01 compatible with 12V and 24V industrial power supplies?
A: Yes. The wide-range DC 5–36V input is compatible with standard 12V and 24V industrial power rails, as well as 5V USB-sourced supplies. Maximum power consumption is only 0.1W, so it can be powered from the same supply as other field devices without a dedicated power circuit.
Q: What is the difference between the EID041-G01 and standard DHT11/DHT22 sensors?
A: The EID041-G01 uses the industrial-grade AHT20 chip (±0.3℃ vs ±0.5℃ for DHT22) in a DIN rail enclosure with RS485 Modbus-RTU interface, three-proof coating, and −40 to +85℃ operating range. DHT11/DHT22 are bare PCB sensors with single-wire digital output, unsuitable for industrial panel installation or multi-drop bus wiring.
Q: Can the EID041-G01 be used outdoors?
A: The module operates from −40 to +85℃ and features three-proof coating for humidity and salt spray resistance. For outdoor deployment, install it inside an IP65 or higher rated enclosure to protect the RS485 terminals and power connections from direct rain and UV exposure.
