This post will show you how to connect HIH-5031 humidity sensors to a Squirrel SQ2040 datalogger. The advice will also be applicable to many other sensors with three connections for power, signal (voltage), and ground.
GSS have released a whole load of new technical documents related to using their C20 CO2 sensor. I was a bit worried when I noticed that the original user guide had disappeared a while ago, but now it’s back, it’s revised, and it has some friends. Enjoy.
This post discusses the C20 CO2 sensor from GSS (Gas Sensing Solutions). It appears to be distributed by Air Monitors and Europa Environmental as the “Miniature CO2 sensor”. Specifically, I will discuss the differences between the datasheet and the actual implementation on the device.
The group obtained some B530 CO2 sensors (produced by ELT, Inc.) to interface to some Arch Rock nodes as part of another project. The datasheet is located here. As a first iteration of my own CO2 sensing setup I borrowed one of the devices to connect to a Verdex Gumstix device. This article gives an overview of how I achieved this, along with some hints and gotchas related to using the sensor.