We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Red digital panel ammeter with 14mm LED display

Autonics Corp

Autonics Corp M4W-DA-7 14mm 200A/50mV DC ammeter electrician tool

SKU CH-G9FB-KS2TW MPN M4W-DA-7

Measures DC current up to 200 A via 50 mV shunt with 14 mm red LED display showing 0 to 199.9

  • TypeTest Equipment
  • Color/FinishRed
  • Item Count1 pack
  • Selling UnitBox
  • Parts3 Years
  • Labor1 Year
  • 14 mm red LED digits give clear DC current readings
  • 200 A / 50 mV shunt input covers high-current circuits
  • 0 to 199.9 display range shows precise measurements
  • Indicator-only output simplifies panel integration
  • New Autonics digital panel meter supplied as single unit

Purpose-built DC ammeter

The Autonics M4W-DA-7 is a digital panel meter designed for electricians who need to monitor direct current in industrial or automation panels. It accepts a 200A/50mV shunt input and presents the reading on a 3½-digit 7-segment LED display with 14mm character height. The unit functions as an indicator only, providing local visual confirmation of current flow without additional output signals. It suits control-cabinet installations where a dedicated DC current readout is required.

Included shunt interface

The meter ships calibrated for a 200A/50mV shunt, so the installer does not need to configure scaling or purchase a separate transducer for that specific ratio. This fixed input specification simplifies wiring in new builds and ensures the 0 to 199.9 display range matches the shunt output directly. No software, programming cables or auxiliary power modules are bundled; the device operates as a standalone indicator once the shunt leads are connected.

200A/50mV fixed input

The single specification that determines compatibility is the 200A/50mV shunt requirement. Panels using a different shunt ratio, an AC current source, or a need for analog or digital output cannot use this meter. Buyers who require configurable scaling, data logging, or communication protocols should select a different model.

Highlights

  • 14 mm red LED digits give clear DC current readings
  • 200 A / 50 mV shunt input covers high-current circuits
  • 0 to 199.9 display range shows precise measurements
  • Indicator-only output simplifies panel integration
  • New Autonics digital panel meter supplied as single unit

Specifications

BrandAutonics
ModelM4W-DA-7
TypeTest Equipment
Color/FinishRed
Item Count1 pack
Selling UnitBox
Parts3 Years
Labor1 Year

Questions about this item

Will the external 50mV shunt need periodic recalibration or replacement over time?

The meter reads the shunt’s 50mV signal directly; as long as the shunt connections stay clean and tight, no internal calibration is required and the shunt itself is a passive component with no wear items.

What limits continuous operation when the display shows 199.9 A?

The 3½-digit LED caps the reading at 199.9 A, so any current above that simply cannot be displayed even if the 200 A shunt could handle it.

How much heat does the red 14mm LED display generate during all-day use?

The indicator-only meter draws only the power needed for the 14mm LED segments, producing negligible heat inside a panel enclosure.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.