Tri-Color USB Controlled Hemisphere Alarm Light with Buzzer POL_Pololu Simple Motor Controllers The integrated 32-level FIFO can

The integrated 32-level FIFO can also be used to store data to minimize host processor intervention

in the past

You can check here for the whole Analog pH Sensor / Meter Pro Kit For Arduino or a spare Industrial Probe as a replacement

Altimeter and temperature

and they don't conduct electricity or interfere with antennae/magnetometers

Tri-Color USB Controlled Hemisphere Alarm Light with Buzzer POL_Pololu Simple Motor Controllers The integrated 32-level FIFO canWith this Tri Color USB Controlled Hemisphere Alarm Light with Buzzer, you can easily monitor and alert humanoids as to the status of a project, machine, or even if the bathroom is occupied! Unlike our "12V" style tower lights , no wiring or microcontroller programming is required. It's completely plug and play for use with any computer that has a USB port, even a Raspberry Pi SBC so we recommend it when you just want to get something running and