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Description
HKD RAIN/WATER SENSOR MODULEHumidity Detection Sensor Module. Rain Humidity Sensor Module Humidity Detection Sensor Module Overview The rain sensor detects water that completes the circuits on its sensor boards' printed leads. The sensor board acts as a variable resistor that will change from 100k ohms when wet to 2M ohms when dry. In short, the wetter the board the more current that will be conducted. Features Sensitivity can be adjusted with the potentiometer. Power indicator,
Humidity Detection Sensor Module. Rain / Humidity Sensor Module
Humidity Detection Sensor Module
Overview
The rain sensor detects water that completes the circuits on its sensor boards' printed leads. The sensor board acts as a variable resistor that will change from 100k ohms when wet to 2M ohms when dry. In short, the wetter the board the more current that will be conducted.
Features
- Sensitivity can be adjusted with the potentiometer.
- Power indicator, the output signal LED indicator
- A large area of rain board, more conducive to detect rain
- Board with positioning holes to facilitate installation
- Raindrops and control panels are separate, easy to wire leads
Pins:
- A0.......... Analog output
- D0......... Digital output
- GND..... Ground
- VCC...... Positive voltage (input: 5v for analog 3.3v for Digital.)
The other two pins on the comparator board should be connected to the rain sensor board.
The kit can be used for weather monitoring purpose also.
The output is in both digital and analog forms:
- In digital: The output is either 0 or 1 and in Analog you get varied output.
- Its output current is 100mA which means that it can easily trigger a relay, a buzzer and an LED.
- The sensitivity can be adjusted with the potentiometer on the board.
- LED lights up when there is no rain and output(D0) is high and when there is raindrop the output is LOW.
Specifications
- With adjustable precision potentiometer sensitivity adjustment
- The working voltage of 3.3V-5V
- The output format: digital switching outputs (0 and 1)
- A fixed bolt holes for easy installation
- Size: 3.2cm x 1.4cm and 5.4 x 4cm
Additional Information
| Device | Sensor Module |
| Type | Rain | Humidity Detection |
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4.7 ★★★★★
Based on 27 reviews
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Product Reviews
★★★★★ 5
Body pillow
Color: Blue(one-sided Cooling), Size: 20"x54"(Pack of 1)
Love . It fits in the bed perfect . Stays cool and doesn’t lose its shape. The material is great and perfect quality
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Reviewed in the United States on May 10, 2026
★★★★★ 5
It works! Quality pillow.
Size: Standard (1 Count), Color: Original White (Cooling)
This does actually provide a cooling effect, and it's very comfortable! The accompanying literature is helpful too. I believe this to be a quality pillow for the price.
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Reviewed in the United States on June 2, 2026
★★★★★ 5
Most comfortable pillow I’ve ever slept on
Size: Queen (1 Count), Color: Crescent White(cooling)
This is the most comfortable pillow I have ever slept on. It doesn't mash down like other pillows. Cradles my neck perfectly plus it’s cool. I broke my neck a couple of years ago and this pillow feels very good and comfortable. Definitely recommend to everyone. Ive used it since May and it’s retained its shape.
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Reviewed in the United States on June 6, 2026
★★★★★ 4
Smell
Size: Queen (2 Count), Color: Original White (Cooling)
The fact that there are not more comments on the smell of these pillows has me worried about some of yall. Listen, I LOVE the weight, and the firmness, it’s perfect for that. However, these pillows are RANK. They have a very strong mildew-ish smell that lingers. I took the outer cover off and washed it and let the pillow air out for a few days, the smell is still very strong when you press your face against it, which one does because it is in fact designed for that purpose. It smells so bad. It’s nauseating. I can smell it through two pillowcases and blanket that I threw on top of them hoping an extra layer would trap the smell. I’ll bake them in the Texas sun tomorrow and hope that helps, because otherwise these are the perfect pillows for someone who wants to feel like they are hugging a torso but can’t stand the sound/feel of someone else breathing. I don’t know…4 stars, if the smell goes away I’ll come back.
Update: many many days later. Either they don’t really smell anymore or I got use to it. They’ve held their firmness and shape well. I like them.
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Reviewed in the United States on March 9, 2026
★★★★★ 5
Actually Cooling Pillow
Size: Queen (1 Count), Color: Original White (Cooling)
This is a really nice pillow, I was worried it would be too soft or too firm but it's just right and it's actually cooling, it feels cool every time I touch it. I've noticed an improvement in sleep since using it. Would recommend!
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Reviewed in the United States on May 27, 2026