Under $100

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3V Vertical Submersible Water Pump

Water pump

25110

This 3V vertical submersible low power water pump...

HK$ 21.00
5.0V 130mA Polycrystalline Solar Cell for the Kitronik Environmental Control Board

Solar Cell

3608

This solar cell  (when used with 3 x AA Ni-MH...

HK$ 69.00
5M Silicone tube for use with 6 - 12V R385 diaphragm pump.

Sensor/Input/Output

2569

5M Silicone tube, replacement or additional tube for...

HK$ 72.00
Kitronik 'Mini' Prong Soil Moisture Sensor for BBC micro:bit

Sensor

56107

The Mini Prong soil sensor is a short...

HK$ 21.00
SparkFun Soil Moisture Sensor (with Screw Terminals)

Sensor

SEN-13637

The SparkFun Soil Moisture Sensor is a simple...

HK$ 60.00
Temperature Sensor - Waterproof (DS18B20)

Sensor

SEN-11050

This sealed digital temperature probe lets you precisely...

HK$ 86.00
Water Pump 6V - 12V with 1m silicone tube

Water pump

2567

This R385 diaphragm pump is the perfect choice...

HK$ 78.00