AMT1001 Analog Voltage Output Resistive Temperature & Humidity Sensor Module – High Precision Environmental Sensing ASAIR

Description

The AMT1001 is an analog resistive temperature and humidity sensor module designed for cost-sensitive environmental monitoring applications. It combines a polymer resistive humidity sensor with an NTC 10K thermistor on a single small PCB, providing analog outputs for both measurements . Unlike digital sensors (DHT22, SHT31), the AMT1001 outputs raw analog signals that require the host microcontroller to perform calculations—making it suitable for users who need direct sensor access or are working with ADCs without digital interfaces.

The humidity output is a direct voltage ranging from approximately 0.6V to 2.7V over the 20–90% RH range, with ±5% RH accuracy . This voltage can be read directly by an ADC and converted to humidity using a linear equation or lookup table. The temperature output, however, is the resistance of an NTC thermistor (10KΩ at 25°C, B-value 3435K) . To read temperature, you must build a voltage divider with a fixed resistor equal to the thermistor’s 25°C value (10KΩ), measure the divided voltage, calculate the thermistor resistance, and then convert resistance to temperature using the Beta formula or a lookup table .

The module operates from 5V DC (4.75–5.25V) with a low current draw of approximately 2mA . It includes temperature compensation circuitry to improve humidity accuracy . The module is fully interchangeable—no calibration is required when replacing units . Common applications include HVAC systems, humidifiers, dehumidifiers, and industrial process control .

Critical limitations: This is a low-cost, non-certified analog sensor intended for hobbyist, educational, and light commercial use. The temperature measurement requires additional circuitry (a 10KΩ resistor) and software calculations, which is not obvious from the product title. The humidity accuracy of ±5% RH is lower than digital alternatives like the DHT22 or SHT31. For applications requiring calibrated, plug-and-play temperature/humidity readings, a digital sensor is more appropriate.

Features

• Dual Sensing Elements: Polymer resistive humidity sensor plus NTC 10K thermistor for temperature .

• Direct Humidity Voltage Output: 0.6–2.7V analog signal for 20–90% RH; simple ADC connection .

• NTC Temperature Output: 10KΩ thermistor (B=3435K) requires voltage divider and calculation .

• Temperature Compensation: Onboard compensation improves humidity accuracy across temperature variations .

• Fully Interchangeable: No calibration required between units .

• Low Power Consumption: Approximately 2mA typical, suitable for battery-powered or embedded applications .

• Wide Operating Range: 0–60°C temperature, 20–95% RH humidity (non-condensing) .

• Compact Module: 60×27mm PCB with 23cm cable for easy integration .

Technical Specifications