1. Product Overview
The YADA YD877Y-N2 Environment Sensor is an integrated temperature and humidity transmitter with digital RS485/Modbus output and built-in LCD display. It is designed for precise environmental monitoring in data centers, telecom rooms, warehouses, HVAC systems, and smart building applications.
It features high measurement accuracy, on-site self-calibration, and automatic networking support for multi-point deployment.
2. Key Features & Advantages
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Integrated Temperature & Humidity Sensing — Monitor both parameters with one device.
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RS485 / Modbus-RTU Output — Easy integration into BMS, SCADA, or IoT platforms.
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LCD Display — Real-time measurement, address, and communication status on screen.
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High Accuracy Performance — Temperature accuracy ±0.5 °C (at 25 °C); Humidity accuracy ±3 %RH (20–80 %RH)
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Wide Measurement Range — Humidity 5 %RH to 95 %RH; Temperature measurement per product spec.
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Quick Installation & Self-Calibration — Supports on-site calibration and automatic networking for multi-point setups.
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Durable Design — Suitable for indoor environmental conditions in telecom rooms, cabinets, etc.
3. Technical Specifications
| Parameter | Specification |
| Model | YADA YD877-N2/YD877Y-N2 |
| Communication | RS485 / Modbus-RTU |
| Temperature Accuracy | ±0.5 °C (at 25 °C) |
| Humidity Accuracy | ±3 %RH (20–80 %RH) (Alibaba) |
| Temperature Range | 20 ℃~80℃ |
| Humidity Range | 5 %RH to 95 %RH |
| Display | LCD (shows temp, humidity, address, comm status) |
| Power Supply | ≤0.4W |
| Operating Environment | Indoor cabinets, telecom rooms, data centers, etc. |
| Calibration & Networking | On-site self-calibration, supports cascading networked measurement points |
4. Applications
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Data Centers & Server Rooms — Continuous monitoring of environmental conditions for equipment protection.
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Telecom / Network Cabinets — Precise temperature and humidity sensing in enclosed cabinets.
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HVAC & Building Automation — Integration into BMS systems for climate control and energy efficiency.
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Warehouses & Cold-storage — Environmental monitoring in storage zones requiring humidity control.
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Smart Building / IoT Monitoring — Networked deployment of multi-point sensors feeding to cloud or control systems.
5. Installation & Configuration
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Wiring: Connect via RS485 twisted pair according to Modbus-RTU protocol.
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Address & Communication: Configure device address and baud rate as needed.
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Mounting Options: Magnetic base or M3 screw mounting available (for easy installation)
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Calibration: Perform on-site self-calibration to adjust offset.
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Networking: Support cascaded networked deployment across multiple sensing points in a facility.
6. Why Choose YD877Y-N2 for B2B Projects
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All-in-One Solution: Temperature + Humidity in one sensor reduces system complexity.
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Standard Industrial Interface: RS485 / Modbus ensures compatibility with common control systems.
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High Precision, Reliable Performance: Suitable for mission-critical environments.
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Scalable Networking: Easy expansion to multi-point systems.
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OEM & Custom Options: Flexible customization based on project needs.
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Export-Ready & Professional Brand: YADA’s strong credentials in environmental and power sensing domain.