Mark Miller Memorial Scholarship Fund

SMT Services

M.C. Miller now offers Surface Mount services. We can build PCB assemblies to your specifications in small to medium runs for both production and prototyping. Visit smt.mcmiller.com for more information or to request a quote.

G1 Owners

Do you own an older G1? Tired of waiting for the OEM GPS unit to sync with satellites? M.C. Miller now offers a GPS upgrade that decreases satellite synchronization time to under 29 seconds from a cold start. Call us for more details.
Local hotels/rentals.
G1 Accessories

G1 accessories and replacement parts

G1 clearance items can be found here.

New! G1 Carrying Case


G1 carrying case holds all the accessories you need while out in the field.
Cat. # 12685
Price $195.00

G1 Cane Adapter




G1 Cane Adapter mounts the G1 on either the Ball or Cane Handle Extensions (#16281 and #16282).
Cat. # 16287
Price $131.00
G1 sold separately
DCVG Surveys
G1 Belt Pack(Cat. #12710)
Price $498.75
The counter/display unit shown in the photograph is not included with the Belt Pack.

The Belt Pack is used to carry the G1 data-logger at waist level, in a hands-free fashion, and it has an integrated dual-probe adapter for use on both CIS and DCVG surveys. The dual-probe adapter is used to connect the data-probes to the G1 data-logger. The Hip Pack trail wire dispenser is used in-conjunction with the Belt Pack for CIS.

Note: If a Backpack is purchased to carry trail wire for CIS, we recommend the Belt Pack (in addition) for DCVG surveys, as the Backpack is not required for DCVG surveys.

Battery pack


G1 replacement battery pack.
Cat. # 126710
Price $273.00

A/C adapter


Cat. # 126715
Price $175.00

GPS Patch Antenna

Gx replacement GPS thumb antenna.
Cat. # 12700
Price $105.00

GPS Extension Antenna

Cat. # 126740
Price $150.00
The G1 data-logger comes standard with a GPS “thumb” antenna.

With regard to pipeline survey work, it is recommended that the thumb antenna be replaced with our GPS extension antenna, which allows the operator to place the antenna on top of their cap (affixed in place via a piece of Velcro). This arrangement provides the GPS antenna with an un-shielded view of the satellites, regardless of the operator’s orientation.

G1 Serial Cable

Cat. # 126730
Price $135.00

If you will be using a Trimble GPS Pathfinder Receiver (XR, XRS, Power or Pocket) as an external source of GPS data for the G1 data-collector (as opposed to using the G1’s internal GPS receiver), you will require the G1 Serial Cable, which is used to connect the serial output cable of the Trimble unit, which terminates in a 9-pin female plug, to the G1’s right-hand (Com4) terminal.

The G1 Serial Cable has a 9-pin male plug on one end (which connects to the serial output cable from the Trimble unit) and a 26-Way Mini-D plug (male) on the other end (which connects to the G1).

G1 USB host cable


G1 USB host cable for connecting your G1 to your computer.
Cat. # 126725
Price $62.00