Under $500

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fischertechnik IR-Track Sensor

Sensor

128598

Ideal for lane recognition

HK$ 286.00
fischertechnik Mini switch (button/ touch sensor)

Sensor

37783

The fischertechnik touch sensor

HK$ 52.00
fischertechnik Optical Color Sensor

Sensor

128599

Ideal for color recognition

HK$ 326.00
fischertechnik Photo resistor

Sensor

32698

For measuring brightness

HK$ 204.00
fischertechnik Photo transistor assembled

Sensor

36134

Electronic switch that reacts to light

HK$ 38.30
fischertechnik Reversing switch

Sensor

36708

 

HK$ 116.00
Grove - Humidity and Temperature Sensor

Sensor

101020011

Grove - Temperature & Humidity Sensor is a...

HK$ 65.00
Kitronik 'Mini' Prong Soil Moisture Sensor for BBC micro:bit

Sensor

56107

The Mini Prong soil sensor is a short...

HK$ 21.00
Light barriers LED 9V assambled 0.01A

Sensor

162135

A light-emitting diode is a semiconductor element that...

HK$ 38.30
Light sensor sticker

Sensor

0735850001470

Light sensor stickers turn light levels into signals...

HK$ 144.00
SparkFun Soil Moisture Sensor (with Screw Terminals)

Sensor

SEN-13637

The SparkFun Soil Moisture Sensor is a simple...

HK$ 60.00