SparkFun
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SparkFun Soil Moisture Sensor (with Screw Terminals)
Sensor
SEN-13637The SparkFun Soil Moisture Sensor is a simple...
HK$ 47.00

Sparkfun Ultrasonic Sensor - HC-SR04
Sensor
SEN-13959This is the HC-SR04 ultrasonic ranging sensor. This...
HK$ 30.00

Temperature Sensor - Waterproof (DS18B20)
Sensor
SEN-11050This sealed digital temperature probe lets you precisely...
HK$ 86.00
