Trimble CAT MS975 Grade Control GNSS GPS GLONASS Base Receiver

The Trimble MS975 is a GNSS smart antenna for machine control: antenna, receiver electronics and vibration isolation packed into one fully sealed housing that mounts on a machine mast or serves as a site base station. Its 220 tracking channels follow up to 44 satellites, covering GPS L1C/A, L2C, L2E and L5 with SBAS support (WAAS, EGNOS, MSAS, QZSS) and GLONASS, Galileo and BeiDou available as tracking options — this unit is listed as a GPS/GLONASS receiver. Trimble rates RTK positioning at 8 mm + 0.5 ppm horizontal and 15 mm + 0.5 ppm vertical.

Interfaces run through a single sealed 16-pin Amphenol bayonet connector carrying two J1939 CAN buses and two RS-232 serial ports, on a 9-32 V DC supply drawing 5 W nominal. This is the Cat-branded variant used across Trimble GCS900 and Caterpillar grade control installations; the listing covers the MS975 receiver pictured, offered as a base receiver per the title.

Condition: Used, tested, as listed. The photographs are of the actual unit you’ll receive, covered by our warranty.