Schneider SF6 density controller, physical picture as shown, with 0.2bar filling pressure gauge, temperature range -25 to +50°C. Used product removed from equipment, in like-new condition, only one available. Suitable for complete set monitoring systems. In occasions requiring precise control, this device is still good, but currently only one is available, suitable for buyers who understand technology. Selling it because it is no longer used, no returns or exchanges after sale. Any questions can contact me at any time, serious inquiries only.