Description
Weston 301-57 Panel Meter DC Ammeter 0-2 Amperes Analog Gauge Round Mount
The Weston Model 301-57 is a round panel-mount analog DC ammeter with a 0–2 ampere range graduated in 0.5A increments. It uses a d'Arsonval moving-coil mechanism behind a white-faced dial clearly marked "AMPERES D.C." and branded Weston, mounted in a round black bakelite housing designed for panel cutout installation. Two brass binding post terminals on the rear provide the electrical connections.
Specifications & What's Included
- Manufacturer: Weston Instruments (a division of Daystrom, Inc., Archbald, PA, USA)
- Model: 301-57
- Measurement type: DC current (amperes)
- Scale range: 0–2 amperes DC
- Scale graduations: 0.5 ampere increments
- Movement type: Analog moving-coil (d'Arsonval)
- Display: White dial face with black printed scale and needle pointer
- Mounting style: Round panel mount with mounting flange and 3 mounting holes
- Terminals: Two brass binding posts on rear
- Housing: Round black bakelite case
- Includes: Gauge only — no mounting hardware or cables
Applications
Panel-mount DC ammeters like the Weston 301-57 are used to monitor direct current flow in electrical panels, control boards, and custom instrument enclosures. Weston Instruments was a long-established American manufacturer of precision electrical measuring instruments, and their panel meters were standard in industrial control panels, power distribution boards, battery charger systems, and laboratory bench setups from the mid-20th century onward. This style of moving-coil panel meter remains useful today in vintage electrical restorations, custom control panels, ham radio equipment, generator monitoring, and any application requiring a direct-reading DC current indicator in the 0–2 ampere range. The round panel-mount format suits standard circular cutouts common in switchgear and instrument panels of that era.
This Weston Model 301-57 DC panel ammeter has been inspected and appears to be in good used condition. The dial face is clean and legible, the needle is present and seated at rest, and both brass binding post terminals on the rear are intact. The black bakelite housing shows light surface wear and some dust or grime around the bezel, consistent with age and prior panel service. Please view our photo set and contact us if you have any questions.
Warranty Information
Additional Information
Brand: |
Weston |
Model: |
301-57 |
MPN: |
301-57 |
SKU: |
49386 |
Type: |
Analog DC Panel Ammeter |
Measurement Type: |
DC Current (Amperes) |
Measurement Range: |
0–2 Amperes DC |
Scale Increments: |
0.5 Amperes |
Display Type: |
Analog Moving Coil |
Panel Shape: |
Round |
Mounting Style: |
Panel Mount |
Connector/Terminal Type: |
Brass Binding Posts (2) |
Seller Notes: |
Gauge only — no mounting hardware or cables included. |
Country/Region of Manufacture: |
United States |
Condition Notes: |
This Weston 301-57 DC panel ammeter has been inspected and is in good used condition. Dial is clean and legible, needle intact, brass terminals good. Housing shows light wear consistent with age. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |
