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Round white analog voltmeter with clear face black needle 45mm dial AC 300V Class 2.5 fine-tuning button

Unique-Bargains

Unique-Bargains SO-45 analog voltmeter AC 0-300V Class 2.5 45mm

SKU CH-AV7B-2JZRJ MPN SO-45

Measures AC voltage from 0 to 300 V with Class 2.5 accuracy in a 45 mm round case

  • Product typeHI - Test & Measurement Tools
  • Measures AC voltage up to 300 V for panel monitoring
  • Class 2.5 accuracy gives reliable readings on 0-300 V scale
  • 45 mm dial face provides clear visibility at a glance
  • Fine-tuning button allows precise pointer adjustment before use
  • Compact 3.5 cm depth fits tight enclosures and control panels

Purpose and Audience

The Unique-Bargains SO-45 is an analog panel meter for monitoring AC voltage up to 300 V with Class 2.5 accuracy. Its 45 mm dial suits hobbyists, technicians and students who need a simple visual indication on a bench supply, control panel or experimental rig.

Fit and Alternatives

The meter suits users who prefer a direct needle readout and have a 5 mm mounting hole available. It does not serve buyers who need digital logging, data output, true-RMS measurement or a higher accuracy class for calibration work.

Installation and Common Issues

Mounting uses the supplied hardware through a 5 mm cut-out; overall depth is 3.5 cm so panel thickness must allow the body to clear. The fine-tuning button adjusts the pointer zero, but misreading the scale parallax or wiring the AC input incorrectly are the typical errors.

How it compares

Measured against everything we stock in Meters, Testers & Measuring Tools, at today’s prices. Recalculated every night.

Price $7.99
Cheaper than about 93% of the 3,030 comparable items (median $54.99).

Specifications

Product
Brand nameUnique Bargains
Product typeHI - Test & Measurement Tools

Questions about this item

Does the SO-45 require an external power source to operate?

No, the analog movement is powered by the measured AC voltage itself, so no separate supply is needed.

Can the 45 mm dial and Class 2.5 accuracy work with a vintage mains supply?

The meter measures AC 0-300 V, covering typical mains voltages, and its Class 2.5 rating means readings stay within 2.5 % of full scale.

How can I verify the SO-45 is reading correctly after wiring it in?

Apply a known AC voltage within the 0-300 V range and confirm the pointer indicates the expected value on the 45 mm scale.

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