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.
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Gx Accessories

Gx accessories and replacement parts

Gx Carrying Case


Gx carrying case holds all the accessories you need while out in the field.
Cat. # 11230
Price $195.00

Gx Belt Pack

Gx Belt Pack (Cat. #11710)
Price $498.75

The Belt Pack is used to carry the Gx 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 Gx data-logger. The Hip Pack trail wire dispenser is used in-conjunction with the Belt Pack for CIS.

Click here to see Gx (sold separately) mounted on Belt Pack.

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.

More Belt Pack Pictures here.


6FT Shrouded Test Leads (Banana plug to 27c Clip)

Color Cat. # Price
Red 34156 $37.50
Black 34160 $37.50

Battery pack


Custom Li-ion battery for the Gx Data-logger.
Note: The Gx requires two of these batteries (two batteries are included with the data-logger at time of purchase).
Cat. # 11310
Price $150.00

A/C adapter


Cat. # 11290
Price $85.00

Automobile adapter


Cat. # 11300
Price $65.00

GPS Patch Antenna

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

GPS Extension Antenna

Cat. # 12740
Price $150.00
The Gx 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.


Serial host cable (9-pin female to female)

Cat. # 11280
Price $64.00
Used for connecting your Gx data-logger to your PC via serial port, or to connect the Gx data-logger to Trimble XT and XH Model GPS receivers. (Cable comes with Gx data-logger package). Older model Trimble GPS receivers, such as the XR and XRS models, can be connected directly to the Gx-data-logger using the output cable supplied by Trimble which terminates with a 9-pin female plug (the Gx data-logger has a 9-pin male connector).

Gx USB host cable(A to mini-B)


Gx USB host cable for connecting your Gx to your computer.
Cat. # 11260
Price $35.00

Gx USB Adapter(A to mini-B)


Cat. # 11270
Price $35.00