Resistive Temperature & Humidity Sensor AMT1001
The AMT1001 Resistive Temperature & Humidity Sensor is an integrated analog sensor module that provides simultaneous temperature and humidity readings through two analog voltage outputs. Operating on 5V DC with only ~2mA current draw, it offers ±5% RH humidity accuracy and ±0.5°C temperature accuracy, making it ideal for HVAC systems, weather stations, greenhouses, and Arduino-based environmental monitoring projects. Featuring single-chip calibration, temperature compensation, and a linear voltage output, it's a reliable and cost-effective solution for environmental sensing.
حساس الحرارة والرطوبة AMT1001 هو وحدة استشعار تناظرية متكاملة توفّر قراءات درجة الحرارة والرطوبة في آنٍ واحد عبر مخرجَيْ جهد تناظريين. يعمل بجهد 5 فولت DC باستهلاك تيار يبلغ حوالي 2 مللي أمبير فقط، ويوفّر دقة ±5% RH للرطوبة و**±0.5 درجة مئوية** للحرارة، مما يجعله مثالياً لـ أنظمة التكييف، ومحطات الطقس، والبيوت المحمية، ومشاريع المراقبة البيئية المعتمدة على Arduino. يتميز بـ معايرة من شريحة واحدة، وتعويض حراري، وخرج جهد خطي، وهو حل موثوق وفعّال من حيث التكلفة لاستشعار البيئة.
The AMT1001 Resistive Temperature & Humidity Sensor Module is a dual-output analog sensor designed to deliver accurate environmental measurements at an affordable price. Built around a resistive humidity sensing element combined with a temperature sensor and onboard signal conditioning, the AMT1001 provides two independent analog voltage outputs — one proportional to relative humidity and one proportional to temperature — making it incredibly easy to interface with any microcontroller's ADC pin.
The module operates on a stable 5V DC supply and consumes only about 2mA of current, making it suitable for battery-powered and low-power IoT applications. Its single-chip calibration ensures consistent performance from unit to unit, while the integrated temperature compensation circuit maintains accuracy across the operating range, ensuring stable long-term performance.
The humidity output is linear, with the voltage rising in direct proportion to the relative humidity. At 5V supply, the output ranges from approximately 0V at 0% RH to 3.0V at 100% RH (in 0.3V steps per 10% RH increment). This clean, linear response makes the AMT1001 incredibly easy to read and convert into RH percentage using a simple linear formula in software.
The temperature output is also analog, with a known voltage-to-temperature relationship that allows direct ADC reading and conversion. The sensor is fully interchangeable between units — no per-device calibration is required — which simplifies design and replacement in commercial products.
Thanks to its low cost, small size, simple analog interface, and reliable performance, the AMT1001 is widely used in HVAC systems, smart greenhouses, automotive air-quality monitors, weather stations, museum and archive climate controllers, and DIY Arduino, ESP32, and Raspberry Pi (with ADC) environmental projects.
How It Works
- Humidity Sensing: The resistive humidity element changes resistance as the surrounding humidity changes. An onboard circuit converts this resistance into a linear analog voltage output.
- Temperature Sensing: A temperature sensor (typically a thermistor) provides a separate analog voltage that varies with temperature.
- Temperature Compensation: The internal circuit compensates for temperature effects on the humidity reading, ensuring accuracy across a wide range.
- Output Reading: The microcontroller reads both voltages with its ADC and converts them into %RH and °C using simple formulas.
Specifications
- Module Name: AMT1001
- Type: Resistive Humidity + Temperature Analog Sensor Module
- Supply Voltage (Vin): DC 4.75V – 5.25V (Typical: 5V)
- Current Consumption: ~2 mA
- Operating Temperature Range: 0°C – 60°C
- Temperature Detection Range: 0°C – 60°C
- Operating Humidity Range: 20% – 95% RH
- Humidity Detection Range: 20% – 90% RH
- Storage Temperature Range: 0°C – 60°C
- Storage Humidity Range: ≤95% RH (Non-condensing)
- Humidity Accuracy: ±5% RH (at 25°C, 60% RH)
- Temperature Accuracy: ±0.5°C (at 25°C)
- Output Type: Dual Analog Voltage Outputs (Humidity + Temperature)
- Output Impedance: 5 kΩ
- Calibration: Single-Chip Calibrated (Fully Interchangeable)
- Compliance: RoHS Compliant
Humidity Output Voltage (Vin = 5V, 25°C)
| Relative Humidity (% RH) | Output Voltage (V) |
|---|---|
| 0% | 0.0 V |
| 10% | 0.3 V |
| 20% | 0.6 V |
| 30% | 0.9 V |
| 40% | 1.2 V |
| 50% | 1.5 V |
| 60% | 1.8 V |
| 70% | 2.1 V |
| 80% | 2.4 V |
| 90% | 2.7 V |
| 100% | 3.0 V |
Sensor Resistance vs. Humidity (Reference, Vin = 5V)
| Relative Humidity (% RH) | Resistance (kΩ) |
|---|---|
| 0% | 27.9 |
| 10% | 18.22 |
| 20% | 12.12 |
| 30% | 8.31 |
| 40% | 5.8 |
| 50% | 4.12 |
| 60% | 3.0 |
| 70% | 2.21 |
| 80% | 1.66 |
Pinout
- Pin 1 (VCC): +5V DC Power Supply
- Pin 2 (Humidity Out): Analog Voltage Output for Humidity (0–3.0V)
- Pin 3 (GND): Ground
- Pin 4 (Temperature Out): Analog Voltage Output for Temperature
Applications
- HVAC Systems — climate control in homes, offices, and industrial buildings
- Smart Home Automation — humidity-controlled fans, dehumidifiers, and humidifiers
- Weather Stations — DIY and commercial environmental monitoring
- Greenhouse Monitoring — climate control for plants and crops
- Indoor Air Quality Monitors — health-focused environmental tracking
- Museums & Archives — climate control for artifact preservation
- Server Rooms & Data Centers — temperature and humidity monitoring
- Pharmaceutical Storage — environmental compliance for medications
- Food Storage Facilities — humidity tracking in warehouses and kitchens
- Automotive Cabin Sensors — climate control for vehicle interiors
- Industrial Process Control — humidity-sensitive manufacturing
- Educational & STEM Projects — teaching environmental sensing
- Smart Greenhouses & Hydroponics — automated plant care systems
- IoT Environmental Monitoring — WiFi/LoRa-based remote sensors
- Incubators & Brooders — controlled environments for hatcheries
- Wine Cellars & Cigar Humidors — preserving optimal conditions
- Replacement Sensor — for damaged AMT1001 modules in existing systems