Basic concepts are described at the basic sensors communication page.
Currently supported sensors:
HighFinesse: laser wavelength meters. Tested with WS6 and WS7 USB-controlled devices.
Ophir: optical power and energy meters. Tested with Ophir Vega.
Lakeshore: temperature sensors. Tested with Lakeshore 218.
Pfeiffer: pressure gauges. Tested with TPG261 and DPG202 controllers.