Designed & Made in the USA Since 1983

DC Connector – Starrett Digital Caliper and Micrometer Cable

SKU MC-D-PT22938-X Category Tag

Command Mobile Module connector for Starrett digital calipers and micrometers using the PT22938 SPC data cable. Enables automated, bi-directional wireless gage data collection — readings are triggered remotely from the MobileCollect Base Receiver or your SPC software. Available in 3.5″ (recommended for Series 721/723 calipers) and 6.5″ (recommended for Series 731/733 micrometers).

Transmitter Family – Command Mobile Module (DC)
Standard Cable Length – 3.5″ (Series 721/723 calipers) | 6.5″ (Series 731/733 micrometers)
SKU – MC-D-PT22938-3.5 (3.5″) | MC-D-PT22938-6.5 (6.5″)
Required Hardware – Command Mobile Module (DC) and MobileCollect Base
Read Button – Yes
Connector IP Rating – N/A
Gage Brand – Starrett

$175.00

DC Wireless Connector — Starrett PT22938

The DC Wireless Connector for Starrett PT22938 gages is the hardware link between your Starrett digital caliper or micrometer and the MobileCollect Wireless automated measurement collection system. Unlike the Mini Mobile Module EVO (M3E), the Command Mobile Module enables bi-directional wireless communication — readings are commanded remotely by the MobileCollect Base Receiver or your SPC software. No button press, no operator touchpoint at the gage required.

How Automated Gage Reading Works

With the Command Mobile Module, the read cycle is controlled upstream. Read commands are issued by your SPC software via serial output to the Base Receiver, or triggered by a foot switch, hand switch, or wireless remote switch connected to the Base. The Base transmits the request wirelessly to the Command Mobile Module, which triggers the gage and immediately returns the measurement data — all without any operator action at the gage.

This architecture eliminates the human touchpoint in the measurement loop, directly reducing transcription error risk and supporting tighter SPC control limits. The Base can also request single or multiple readings per command cycle and issue sleep commands to extend battery life — all configurable from your host PC or application.

Compatible Starrett Digital Calipers and Micrometers

The MC-D-PT22938 is designed for Starrett digital instruments that use the PT22938 SPC data cable, including:

  • Starrett Series 721 & 723 Digital Calipers (recommend 3.5″ cable)
  • Starrett Series 731 & 733 Digital Micrometers (recommend 6.5″ cable)

Cable length recommendation: order 3.5″ for Starrett 721/723 calipers; order 6.5″ for Starrett 731/733 micrometers. Use the MobileCollect Selection Tool to verify your specific model.

Other Versions of This Cable

MicroRidge also offers the PT22938 cable/connector for other systems in the MobileCollect and GageWay product families:

M3 Connector — Starrett PT22938 — For the Mini Mobile Module EVO (M3E). The M3E is the compact transmitter for applications that only require operator-initiated reads at the gage. One-way wireless communication; smaller form factor than the DC.

M3E vs. Command Mobile Module — Choosing the Right Transmitter

The Command Mobile Module (DC) supports both automated, remotely commanded reads and manual operator-initiated reads via its built-in read button — so it can do everything the M3E does, plus remote automation. The tradeoff is form factor: the DC is larger than the M3E to accommodate the higher-capacity battery required to sustain remote-triggered read cycles. If your application only requires operator-initiated reads at the gage and a compact transmitter profile is a priority, the Mini Mobile Module EVO (M3E) is the right transmitter for that use case.

Part of the MobileCollect Wireless Network

MobileCollect is a brand-agnostic measurement collection platform — it doesn’t lock you into a single gage manufacturer. Whether your shop floor runs Mitutoyo calipers alongside Mahr micrometers, Starrett indicators, or Fowler height gages, MobileCollect connects them all into a single wireless SPC data network. This connector is one component in that system. To complete the automated wireless link, pair this connector with a Command Mobile Module transmitter (MC-MM-DC) and a MobileCollect Base Receiver.

Product Specifications

MC-D-PT22938-3.5 | MC-D-PT22938-6.5 Specs
Transmitter Family
Command Mobile Module (DC)
Standard Cable Length
3.5 inches (Series 721/723 calipers) | 6.5 inches (Series 731/733 micrometers)
SKU
MC-D-PT22938-3.5 (3.5″) | MC-D-PT22938-6.5 (6.5″)
Required Hardware
Command Mobile Module (DC) & MobileCollect Base
Read Button
Yes
IP Rating
N/A
Gage Brand
Starrett