SparkFun
Logomatic v2 Serial SD Datalogger (FAT32) (WIG-12772)
£46.48£59.74Unit price /UnavailableSparkfun Electronics
Low Concentration Ozone Gas Sensor - MQ-131
£33.40£42.92Unit price /UnavailablePololu
LPS25HB Pressure/Altitude Sensor Carrier with Voltage Regulator
£4.21£5.99Unit price /Unavailable