Sierra 57901P Amega 2 Inch Voltmeter, 8-18 VDC

The Sierra 57901P is a 2 inch Amega voltmeter built for 8-18 VDC systems, giving helm operators a clear, at-a-glance read on battery and charging voltage. It uses the Amega black dial design with red graduations, white numerals, and a vivid white pointer staff for high contrast in bright sun or low light. The face is protected by a scratch resistant curved glass lens set into a black, near-flush bezel for a clean, low-profile look on the dash. The gauge includes both perimeter and thru-dial lighting so it stays readable at night, and the scale is marked with U.S. And metric graduations along with ISO symbols where appropriate.

Installation requires a 2.13 inch mounting hole. The Amega line has been a popular Sierra dial style since its debut in 1986, and the 57901P voltmeter is also offered as part of larger Amega instrument sets alongside matching speedometers, tachometers, and fuel/temperature gauges for a coordinated dash layout.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 57901P
• Item Type: Voltmeter, Amega 2 inch, 8-18 VDC
• Dial Style: Amega black dial
• Voltage Range: 8-18 VDC
• Dial Color: Black
• Graduation Color: Red
• Numeral Color: White
• Pointer: White pointer staff
• Lens: Scratch resistant curved glass
• Bezel: Black, near-flush
• Lighting: Perimeter and thru-dial lighting
• Required Mounting Hole Size: 2.13 inches
• Item Dimensions: 4.6 x 3.5 x 3.3 inches
• Weight: 0.31 pounds
• Material: Glass
• Scale Markings: U.S. And metric, with ISO symbols where appropriate
• UPC: 731957420084

Frequently Asked Questions

What voltage range does the Sierra 57901P voltmeter cover? The Sierra 57901P is built for 8-18 VDC systems, making it suited to standard 12 volt marine electrical setups.

What size mounting hole does the 57901P need? A 2.13 inch mounting hole is required to install the Sierra 57901P voltmeter in the dash.

What are the physical dimensions of this gauge? The Sierra 57901P measures 4.6 x 3.5 x 3.3 inches, consistent with a 2 inch Amega-style dial gauge.

How much does the 57901P voltmeter weigh? It weighs 0.31 pounds.

Is the lens on the 57901P glass or plastic? The Sierra 57901P uses a scratch resistant curved glass lens set into a black, near-flush bezel.

Does the 57901P have lighting for night use? Yes, the gauge includes both perimeter and thru-dial lighting for nighttime readability.

What colors are the dial, numerals, and pointer on the 57901P? It has a black dial with red graduations, white numerals, and a vivid white pointer staff.

Is the 57901P sold only as a single gauge? The Sierra 57901P voltmeter is also included as a component within larger Amega instrument sets alongside other Amega gauges, in addition to being available on its own.

What scale markings does the 57901P use? The dial is marked with both U.S. And metric scales, including ISO symbols where appropriate.

How long has the Amega dial style been available? The Amega line, which includes the Sierra 57901P voltmeter, has been available in several styles since its debut in 1986.

What is the Sierra part number for this voltmeter? The public part number is 57901P.

Is the bezel on the 57901P flush with the dash? The Sierra 57901P has a black, near-flush bezel for a clean dash-mounted appearance.