AM2315C Temperature And Humidity Sensor -40 ~ + 80

The AM2315C is a digital temperature and humidity sensor module featuring I2C communication protocol with an extended operating range of -40 to +80 degrees Celsius, designed for precise environmental monitoring in industrial and embedded applications. HVAC technicians, IoT developers, and environmental monitoring system engineers rely on this sensor for accurate climate control and data logging in challenging temperature conditions. This sensor solves the critical problem of measuring temperature and humidity variations in extreme environments where standard sensors fail, enabling reliable automation and predictive maintenance systems.

Product Overview

The AM2315C operates on the principle of capacitive humidity sensing combined with thermistor-based temperature measurement, delivering calibrated digital output through a two-wire I2C interface. The sensor integrates a dedicated signal conditioning circuit that compensates for temperature drift and humidity hysteresis, ensuring measurement accuracy across its entire operating range. This design eliminates the need for external calibration and provides plug-and-play compatibility with microcontroller platforms including Arduino, Raspberry Pi, and STM32 development boards.

What distinguishes the AM2315C from competing sensors is its robust construction with an internal heating element that prevents condensation on the sensing element, making it suitable for high-humidity environments and outdoor applications. The sensor features a 1.5-second response time and operates on a single 3.3V to 5V power supply with minimal current draw of approximately 0.5mA during measurement cycles, making it ideal for battery-powered IoT devices and remote monitoring stations.

Key Specifications

Specification	Details
Product Type	Digital Temperature and Humidity Sensor Module
Brand	Aosong Electronics
Origin	Original/Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp
Temperature Range	-40 to +80 degrees Celsius
Humidity Range	0 to 100% RH
Temperature Accuracy	±0.5 degrees Celsius
Humidity Accuracy	±2% RH
Communication Protocol	I2C (Two-Wire Interface)
Supply Voltage	3.3V to 5V DC
Current Consumption	0.5mA (typical measurement)
Response Time	1.5 seconds
Output Resolution	16-bit digital

Key Features

• Extended Temperature Range: Operates reliably from -40 to +80 degrees Celsius, covering extreme cold storage facilities and high-temperature industrial environments
• High Accuracy Sensors: Temperature accuracy of ±0.5°C and humidity accuracy of ±2% RH enable precise climate control and data logging applications
• I2C Digital Interface: Two-wire communication protocol simplifies microcontroller integration and eliminates analog signal conditioning requirements
• Built-in Heating Element: Internal heater prevents condensation on the sensing element, ensuring reliable operation in high-humidity and outdoor conditions
• Low Power Consumption: 0.5mA typical current draw makes this sensor ideal for battery-powered IoT devices and wireless sensor networks
• Fast Response Time: 1.5-second measurement cycle enables real-time environmental monitoring and quick system response to climate changes

Applications and Use Cases

• HVAC Control Systems: Integrate into heating, ventilation, and air conditioning systems to maintain precise temperature and humidity levels in commercial buildings and data centers
• Cold Chain Monitoring: Deploy in refrigerated transport and storage facilities to track temperature fluctuations and ensure product quality compliance in pharmaceutical and food industries
• IoT Environmental Stations: Build weather stations and environmental monitoring networks that transmit real-time data to cloud platforms for analysis and alerting
• Industrial Process Control: Monitor manufacturing environments where temperature and humidity affect product quality, such as electronics assembly, textile production, and pharmaceutical manufacturing
• Greenhouse Automation: Implement automated climate control systems for agricultural applications that adjust ventilation and irrigation based on real-time sensor data
• Data Center Management: Track environmental conditions in server rooms to prevent equipment overheating and optimize cooling efficiency

How to Use

The AM2315C connects to your microcontroller using four wires: VCC (3.3V to 5V), GND (ground), SDA (I2C data line), and SCL (I2C clock line). Connect pull-up resistors of 4.7 kilo-ohms between SDA and VCC, and between SCL and VCC to ensure proper I2C signal levels. Install the appropriate I2C library for your development platform and configure the I2C bus speed to 100 kHz for reliable communication.

After power-up, allow the sensor 1.5 seconds for initialization before reading data. Query the sensor by sending the I2C address (0x5C) with a read command to retrieve 4 bytes of data containing temperature and humidity values. Temperature data occupies the first two bytes and requires conversion using the formula: actual temperature equals raw value divided by 16 minus 40. Humidity data occupies the last two bytes and requires division by 16 to obtain percentage RH. Implement periodic measurements at intervals of 2 seconds or greater to allow the sensor adequate time between consecutive readings and minimize power consumption in battery-powered applications.

Frequently Asked Questions

What is the difference between the AM2315C and AM2315 sensor models?

The AM2315C features an improved capacitive humidity sensing element with better linearity and reduced hysteresis compared to the earlier AM2315 model. Additionally, the AM2315C includes an internal heating element that prevents condensation accumulation, making it more suitable for high-humidity and outdoor environments. Both models share the same I2C communication protocol and temperature range, but the AM2315C offers superior accuracy and reliability in challenging conditions.

Can the AM2315C be used for outdoor weather station applications?

Yes, the AM2315C is well-suited for outdoor weather monitoring applications due to its extended temperature range and internal heating element that prevents condensation. However, you should house the sensor in a radiation shield to protect it from direct sunlight and precipitation. The radiation shield allows air circulation while blocking solar radiation that could artificially elevate temperature readings. Ensure proper drainage and ventilation in your enclosure to prevent water accumulation that could damage the sensor.

What is the maximum cable length for I2C communication with the AM2315C?

For reliable I2C communication, keep cable lengths under 1 meter at standard 100 kHz bus speed. If you require longer cable runs up to 5 meters, reduce the I2C bus speed to 50 kHz and increase pull-up resistor values to 2.2 kilo-ohms. For distances exceeding 5 meters, implement an I2C level shifter or repeater circuit to regenerate the signal and maintain data integrity. Always use twisted-pair shielded cable to minimize electromagnetic interference and signal degradation.

How do I calibrate the AM2315C sensor for improved accuracy?

The AM2315C comes factory-calibrated and does not require user calibration under normal operating conditions. However, if you observe systematic errors, you can implement software calibration by comparing sensor readings against a reference instrument and applying offset corrections in your firmware. Measure the sensor output at known temperature and humidity points (such as ice water at 0°C and saturated salt solutions at specific RH levels) and create a lookup table or linear regression model to compensate for any systematic deviations.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

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• Returns: 7-day return policy on manufacturing defects only

Buy AM2315C Temperature And Humidity Sensor -40 ~ + 80 Online in India

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