4Pin LDR Module – Optical Sensitive Resistance Light Detection Sensor Module

Two-wire temperature sensor with a 1-metre lead. The listing mentions both PT100 and K-type; confirm the sensor type before selecting an interface.

DHT11 Humidity and Temperature Sensor Module. Designed for monitoring temperature and humidity.

HC-SR04 Ultrasonic Sensor Module. Designed for measuring distance using ultrasonic signals.

Infrared Transmitter LED 3mm 2-PIN. An LED component in the stated size and color.