Vaisala Indigo 201 Analog Output Transmitter, With AC Adapter & Software.  Nice clean instrument. 

Operating voltage

24 VDC (Includes AC Supply)

IP rating

IP65

Analog outputs

Three analog outputs (voltage or current): Voltage: 0 … 1 V, 0 … 5 V, 0 … 10 V, 1 … 5 V, scalable, min. load 1 kΩ, Current: 4 … 20 mA, 0 … 20 mA, scalable, max. load 500 Ω