1. Product Overview
The YADA S2-RHT20BD-RS485 Temperature and Humidity Sensor is a compact, high-precision digital transducer designed for industrial and commercial environmental monitoring.
Equipped with the SHT20 digital sensing element, it provides accurate temperature and humidity readings and outputs data through a MODBUS-RTU RS485 interface, making it ideal for HVAC systems, smart buildings, data centers, and warehouse monitoring.
2. Key Features
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High Precision Measurement:
Temperature accuracy ±0.5 °C (at 25 °C); humidity accuracy ±4.5 %RH (20–80 %RH, 25 °C). -
Wide Measurement Range:
Temperature: –20 °C to +80 °C; Humidity: 0 %–100 %RH (non-condensing). -
RS485 MODBUS-RTU Protocol:
Standard communication for seamless integration with building automation and IoT systems. -
Compact and Lightweight Design:
Dimensions: 71×60×30 mm; easy wall or surface mounting with built-in magnetic base. -
Industrial-Grade Reliability:
Stable operation in harsh environments; strong EMC resistance and long-term calibration stability. -
Low Power Consumption:
Operates on DC 10–28 V, ≤ 0.5 VA; ideal for continuous real-time monitoring. -
Digital Output Isolation:
Safe, interference-free signal transmission for high-accuracy data collection.
3. Technical Specifications
| Parameter | Specification |
|---|---|
| Model | S2-RHT20BD-RS485 |
| Temperature Range | –20 °C ~ +80 °C |
| Humidity Range | 0 %RH ~ 100 %RH |
| Accuracy | Temp ±0.5 °C @ 25 °C; RH ±4.5 %RH (20–80 %RH) |
| Power Supply | DC 10 V – 28 V (typ. 12 V DC) |
| Power Consumption | ≤ 0.5 VA |
| Sensor Element | SHT20 Digital Probe |
| Communication | RS485 MODBUS-RTU (N, 8, 1, 9600 bps) |
| Working Environment | –20 °C ~ +80 °C; 5 %–95 %RH (non-condensing) |
| Storage Environment | –20 °C ~ +80 °C; 5 %–95 %RH (non-condensing) |
| Dimensions | 71 × 60 × 30 mm |
| Weight | 0.029 kg |
| Installation | Magnetic base / wall mount |
| Output Isolation | Digital isolated output |
| Protection Level | IP 30 (standard), custom IP ratings available |
4. Applications
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HVAC and Building Automation – Control and monitor indoor climate, air handling, and ventilation.
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Data Centers and Server Rooms – Maintain optimal environmental stability for critical infrastructure.
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Smart Warehouses and Cold Storage – Track temperature and humidity for product quality assurance.
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Industrial Automation – Integrate into PLC or DDC systems for environmental control.
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IoT Environmental Monitoring – Connect to cloud platforms for remote supervision and data analytics.
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Telecom Base Stations – Monitor heat and humidity to ensure safe operation of electronic equipment.
5. Installation & Communication
Wiring Terminals:
1 – Power (+) 2 – Power (–) 3 – RS485_A 4 – RS485_B
Communication Settings:
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Protocol: MODBUS-RTU
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Data Frame: N, 8, 1 (No Parity)
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Baud Rate: 9600 bps
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Address Setting: Configurable via DIP switch or software
Dimension
Installation Tips:
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Avoid direct airflow from air conditioners or humidifiers.
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Keep away from sunlight, water, or corrosive gases.
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Install at a representative measurement height (1.2–1.5 m).
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Do not install in areas with excessive dust or condensation.
6. Advantages for B2B Buyers
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OEM / ODM Customization — Output range, communication protocol, enclosure material, and branding.
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Reliable Industrial Quality — ISO-certified production, 100 % tested before delivery.
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Global Compliance — CE / RoHS available for international export.
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Competitive Pricing — Designed for HVAC, automation, and environmental monitoring integrators.
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Strong Technical Support — Backed by over 30 years of experience in power and sensing instruments.