The DS18B20+ is a handy, 1-wire compatible temperature sensor, ideal for interfacing with the PICAXE!
This humidity/temperature sensor measures relative humidity from 10% to 95% with a typical error of ±2%RH at 55% RH
Temperature sensor with a range of -30°C to +80°C with a typical error of ±0.75°C in the 0°C to 80°C range.
The Sensirion Temp/Humidity Sensor is an efficient sensor that measure the ambient temperature and humidity of the surrounding area.
This is a tidy analog temperature sensor with a functional range of -40°C to +125°C
This sensor uses infrared technology to detect an object at 5mm by determining the difference between low reflective conditions (i.e. black) and high reflective conditions (i.e. white).
The Pololu IR beacon is a compact board that is used in pairs to allow robots to locate each other.
Four spindles on the trackball have a tiny circular magnet the end; each of these are paired with an SMD hall effect sensor, which are used to measure up, down, left and right movements of the trackball.
The MEAS Vibration sensor is flexible and durable.