Vintage Circuitmate DM73 Beckman Instruments digital Meter. Japan TESTED

The item in the image is a vintage Wavetek DM73 Digital Multimeter, also widely known and distributed under the Beckman Industrial / Circuitmate brand name.

This specialized, pen-style device was designed for convenient, one-handed diagnostic troubleshooting across electrical and electronic circuits.

Key Features & Specifications

• Form Factor: Compact "probe" or pen design integrating the main body, display, and positive test probe into a single handheld unit.

• Input Limits: As marked explicitly on the orange collar of the unit:

• AC Voltage: 250V MAX

• DC Voltage: 500V MAX

• Resistance (Ω / Continuity): 250V MAX

• Functionality: Features a central slide switch to toggle between measuring Voltage (V) and Resistance/Continuity (Ω/\\(\ightarrow\\vdash\\)).

Testing Safety Note

Because of the compact pen design, your hand is physically closer to the contact point than it would be with traditional desktop multimeter leads. Always exercise caution and respect the rated voltage maximums when troubleshooting live electrical systems.