A
Anonymous
Apr 02, 2026
Rating: 3/5
Average Performance
Sensitive to temperature changes. Okay for basic use but not for precision work.
Description
Tmall 14-Year Established Store Risym Weixin High-Quality Best-Seller
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Model Number | CJ-HJ31A |
| Sensor Chip | HR202L |
| Operating Voltage | 3.3V to 5V DC |
| Operating Current | 0.5mA (Typical) |
| Humidity Range | 10% to 95% RH |
| Humidity Accuracy | ±5% RH |
| Response Time | Less than 10 Seconds |
| Operating Temperature | -20°C to 60°C |
| Interface Type | Analog Output |
| PCB Dimensions | 25mm x 15mm x 5mm |
5 reviews
A
Anonymous
Feb 22, 2026
Rating: 5/5
Fast Shipping
Arrived quickly and packaging was secure. Sensor works great out of the box.
A
Anonymous
Feb 09, 2026
Rating: 4/5
Good value for money
Works well but needed some calibration initially. Once set up, it performs reliably.
A
Anonymous
Feb 05, 2026
Rating: 5/5
Excellent for DIY Projects
Integrated smoothly with my Arduino setup. Readings are stable and consistent over time.
A
Anonymous
Jan 28, 2026
Rating: 5/5
Perfect Replacement
Replaced my old 23A module without issues. Highly recommend for compatibility.
5 FAQ
Q: Is this compatible with Raspberry Pi?
A: Yes, it works with 3.3V logic pins on most Raspberry Pi models.
Q: What is the warranty period?
A: We offer a 30-day return policy for manufacturing defects.
Q: Is it waterproof?
A: The sensor is not waterproof, only moisture resistant for air humidity.
Q: Can it measure temperature too?
A: No, this model is designed for humidity detection only.
Q: Does it come with a library?
A: Basic example code is provided in the product description download section.
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