Beckman Coulter Hach MET ONE 6015P 

Portable Particle Counter 6000

MET ONE 6015P Remote with Pump (Ethernet Interface, AC Power)

The MET ONE 6015P adds serial communication and an integrated relative humidity and temperature port. This port enables the use of an optional probe that includes RH/Temp data along with the particle count data stream to further simplify installation and increase the information your monitoring system provides.

The device is in working order.