Description
RHI-112A Temperature and Humidity Sensor Module — Precision Environmental Monitoring
The iFJF RHI-112A Temperature and Humidity Sensor Module delivers accurate, reliable environmental measurements for a wide range of applications. From greenhouse climate control to home automation, HVAC diagnostics to DIY IoT projects — this sensor module is your go-to for measuring temperature and humidity with confidence.
Key Features
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High Accuracy: Temperature accuracy of ±0.5°C (±0.9°F) and humidity accuracy of ±3% RH across the full measurement range
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Wide Measurement Range: Temperature from -40°C to +80°C (-40°F to +176°F), humidity from 0% to 100% RH
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Digital Output: Standard I²C or single-wire digital interface — easy integration with Arduino, Raspberry Pi, ESP32, and other microcontrollers
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Low Power Consumption: Ideal for battery-powered remote monitoring applications — draws less than 1mA during measurement
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Fast Response Time: Temperature response within 5 seconds, humidity response within 8 seconds
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Pre-Calibrated: Factory calibrated — no user calibration required
Applications
| Application |
Use Case |
| Greenhouse Monitoring |
Track temperature and humidity to optimize plant growth conditions — trigger ventilation or misting systems automatically |
| HVAC Systems |
Monitor indoor climate for smart thermostats and building automation systems |
| Weather Stations |
Capture local environmental data for personal or community weather monitoring |
| Incubators |
Precise temperature and humidity control for egg incubation — critical for hatch rates |
| IoT & Home Automation |
Integrate with Home Assistant, Node-RED, or custom IoT platforms for smart home climate control |
| Food Storage |
Monitor wine cellars, cigar humidors, or food storage environments |
| Server Rooms |
Ensure optimal temperature and humidity for IT equipment — prevent overheating |
Technical Specifications
| Parameter |
Value |
| Model |
RHI-112A |
| Temperature Range |
-40°C to +80°C (-40°F to +176°F) |
| Temperature Accuracy |
±0.5°C (typical) |
| Humidity Range |
0% to 100% RH |
| Humidity Accuracy |
±3% RH (20-80% RH), ±5% RH (full range) |
| Interface |
I²C / Single-Wire Digital |
| Supply Voltage |
3.3V to 5.5V DC |
| Current Consumption |
<0.5mA (measuring), <15μA (standby) |
| Response Time |
≤5s (temp), ≤8s (humidity) |
| Dimensions |
Compact module — approximately 15mm x 12mm |
Why Choose the RHI-112A?
Unlike basic analog sensors that require complex calibration and signal conditioning, the RHI-112A provides factory-calibrated digital output over standard I²C or one-wire interfaces. This means you spend less time debugging sensor readings and more time building your project. The ultra-low standby current (<15μA) makes it perfect for battery-powered remote sensors that need to run for months on a single charge. Whether you're a hobbyist building a weather station or an engineer integrating environmental monitoring into a commercial system, the RHI-112A delivers professional-grade accuracy at a hobbyist-friendly price.
Wiring & Integration
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VCC: 3.3V to 5.5V DC
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GND: Common ground
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DATA: Digital data line (single-wire mode) or SDA (I²C mode)
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SCL: Clock line (I²C mode only)
Libraries available for Arduino, Raspberry Pi (Python), and ESP32/ESP8266. Sample code included with purchase.
FAQ
Q: Is this compatible with Arduino?
A: Yes. The RHI-112A works with any Arduino board (Uno, Nano, Mega, etc.) via I²C or single-wire digital interface. Libraries are available for quick integration.
Q: Can I use this outdoors?
A: The sensor module itself is not weatherproof. For outdoor use, place it in a weather-resistant enclosure (such as a Stevenson screen or radiation shield) to protect it from direct rain and solar radiation while allowing airflow.
Q: What's the difference between this and a DHT22?
A: The RHI-112A offers similar accuracy to the DHT22 (±0.5°C vs ±0.5°C temperature, ±3% vs ±2-5% humidity) but with significantly lower power consumption and a wider temperature range (-40°C to +80°C vs -40°C to +80°C).
Q: Does this work with Home Assistant?
A: Yes. With an ESP32 or ESP8266 running ESPHome or Tasmota, the RHI-112A integrates seamlessly with Home Assistant for smart home climate monitoring.
Q: How long is the cable?
A: The module typically includes a short connection interface. For longer cable runs, use shielded wire and consider I²C range extenders for distances over 1 meter.
Q: Is programming knowledge required?
A: Basic programming knowledge is helpful for integrating the sensor with microcontrollers. However, many platforms (Arduino, ESPHome) provide ready-to-use libraries that require minimal coding.
