103 Series {AB-40 & DB-40} Switchboard Meters

4 1/2", Well gasketed with metal can shield (Rugged, High accuracy meter, 250° Deflection)


  • Water resistant construction
  • Shock resistant Pivot and jewel movement
  • Tracking: ± 1 1/2% DC; ± 2% AC ; vertical mounting
  • ± 2% AC – rectifier type – low voltage only (60 Hz sine wave)
  • AC (transducer driven ±1% of full scale)
  • Repeatability: ± 0.5% DC and rectifier type
  • Yokogawa provides a full range of 250° deflection Switchboard meters including:
    • AC & DC Voltmeters
    • AC & DC Ammeters, shunt rated or self contained
    • Expanded scale meters
    • Frequency Meters
    • Synchroscopes
    • Power Factor Meters
    • Watts & Var Meters
    • Temperature Indicators
    • Tachometer indicators
    • Specialized Hybrid meters ( digital and analog Displays )
    • Counters
    • RTD Temperature
  • Optional LED Illumination


  • Control room applications
  • Marine Applications
  • Ideal for adverse (dusty) environments or severe applications, meets UL-1437, IEC 144 or IP54
  • Ideal for OEM and Retrofit applications


Yokogawa The 103 series of switchboard meters are UL/CSA recognized and are typically accurate to within ±1% of full scale. The 103 series offers interchangeable 250 degree linear scales that provide greater resolution and easier to read values. Scaling can be easily modified by exchanging the numeral scale or the division scale with the appropriate combination. The meter is electrically shielded by a metal can. Both the front cover and the rear of the meter are gasketed, protecting the switchboard from dust ingress.

  • Literature
  • Specifications
Literature and Technical Information
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Switchboard Panel Meters

++ Yokogawa Switchboard Catalog
Model: Yokogawa 103 Series (AB-40 – DB40)
Scaling: Customized to any scaling desired, from linear to specialized Cos Ø, square root distributions, with color applications for visual emphasis and to any desired engineering unit.
Specific Accuracies
Basic Accuracy: ±1.0% of full scale basic accuracy class.
Rectifier Type Meters: ±1.5% @ 25°C calibrated to sine wave.
Expanded Scale Voltmeters: 0.3% of mid-scale
Power Factor Meters: ±1% of scale length from 20-100% of rated current on balanced system models; ±3% of scale length on unbalanced system model types.
Synchroscopes: ±1% of scale length.
Frequency Meters: ± .15Hz @45-55Hz and 55-65Hz, ±0.093Hz @ 58-62Hz, ±1.5Hz @350-450Hz
General Specifications
Position of use: Vertical (scale) standard
or to specified angle or position
Full scale deflection angle: 250°, except synchroscope is 360°
Full scale length: 6.9 inches.
Scale plate: platform type 2 piece scale with graduations on the outer scale; numerals and legends on the inner scale. Single scale for illuminated versions
Movement: Proven, shock resistant Taut Band
Case: All AB/DB switchboard instruments have drawn steel case with zinc chromate coating except AB/DB40 plastic case version which is ABS plastic.
Cover: Gasketed cover to prevent contaminant ingress, polycarbonate-UL94V-0 cover and window.
Terminal plate: phenol resin material.
Mounting studs: 1/4” x 28 thread.
Terminal studs: 10-32 thread.
Dielectric level: 2300VAC for 1 minute between the electrical circuit and mounting studs.
Overload rating: Voltmeter and potential coils-1.2 x rating (continuous).
AC Ammeters- 2 x rating (continuous), and 10 x rating for one second.
Current coils (other than ammeters) 1.5 x rating (continuous), and 10 x rating for one second.
Response time: Approximately 2.5 seconds
Operating Temp.: 0 to 40°C (32 to 104°F)
Storage Temp: -10 to 50°C (14 to 50°F)
Extreme temperature range: -20°C to 65°C (-4 to 149°F)
Tropicalized or IP54 sealed units available
Relative Humidity: 95% (non condensing)
Case Dimensions
Meter Face: 4.33" X 4.33"
Case Depth: AB Series = 4.10"
DB Series = 3.20"
Watt/Var/ Psych = 5.22" +1.57" for stud length
Case Diameter: 3.97"
Cut out Diameter 4.030"
Studs 1.688" from mid-line (Hor. & Vert.)
3.375" between studs (Hor. & Vert.)