It is a Humidity Sensitive Switch Relay Module. The module uses a high-quality HR202 humidity sensor. The comparator output directly drives the relay to connect 220V AC or other equipment. With potentiometer to adjust the detection threshold. The sensor interface can be equipped with a pin and a wet sensor with a lead.
HR202 Humidity Sensitive Switch Relay Module
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| Dimensions | 64 × 26 × 17 cm |
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