CJHT1001 Temperature & Humidity Sensor Module (0-3V Analog Output) – Direct Replacement for AMT1001

Description

The CJHT1001 is an analog resistive temperature and humidity sensor module designed as a drop-in replacement for the widely used AMT1001. It combines a polymer resistive humidity sensor with an NTC thermistor on a compact ABS housing, providing analog outputs that interface directly with any microcontroller ADC .

The module is marketed for cost-sensitive environmental monitoring in humidifiers, HVAC systems, and other consumer appliances. Its 0–3V analog voltage output matches the AMT1001’s signaling convention, allowing it to be used in existing designs without firmware changes—provided the sensor’s transfer function is compatible.

Critical distinction from AMT1001: The original AMT1001’s temperature output is the resistance of an NTC thermistor, not a direct voltage. The CJHT1001 listing describes both outputs as “analog voltage 0-3V” , which suggests the module may include onboard signal conditioning that converts the thermistor resistance to a voltage. If true, this is a significant improvement—it eliminates the external 10KΩ voltage divider required by the AMT1001. However, this must be verified with the supplier before publishing, as the listing may simply be imprecise.

Limitations: This is a low-cost, non-certified analog sensor. The temperature output (whether resistance or conditioned voltage) requires software calibration for accurate readings. The humidity output is approximately linear but benefits from a lookup table for best accuracy. For applications requiring calibrated, plug-and-play digital readings, a digital sensor (DHT22, SHT31) is more appropriate.

Features

• Direct AMT1001 Replacement: Designed to fit the same footprint and provide compatible analog signaling .

• Wide Temperature Range (-10 to 65°C): Broader than the AMT1001’s 0–60°C range, according to the CJHT1001 listing .

• 0–3V Analog Output: Compatible with standard microcontroller ADCs.

• Temperature Compensation: Onboard compensation improves humidity stability .

• Low Power Consumption: Suitable for battery-powered and embedded applications .

• Fast Response Time (1s): Quicker than the AMT1001’s typical 10s humidity response .

• Compact ABS Housing: Impact-resistant and chemically resistant enclosure .

• Humidity Range 20–95%: Suitable for most indoor environmental monitoring applications .

Technical Specifications