Eberline Smart Energy Compensated GM probe that when used with an E-600 or other "Smart" meter will allow the meter to automatically adjust the parameters to the calibration settings for that probe. Literally plug and play.
Note that the photo is a stock verson. If you want a photo of the actual probe, let us know. These are used instruments. They are fully warranteed to meet the original factory specifications. Two are shown, but we sell them one at a time.
You will need a smart cable to hook this to a smart meter. These don't work with standard meters unless you adapt the connector.