121 Series, {AB-16 & DB-16} Switchboard Meters

8 ½ ", Well gasketed with metal can shield
(Rugged, High accuracy meter, 250° Deflection)


  • 250 degree scale deflection
  • Built-in Transducer for scaling linearization
  • Linear scaling allows product flexibility
  • LED Illuminated Versions available
  • Meters accurate to within ±1% of full scale
  • Water tight construction
  • ± 2% AC – rectifier type – low voltage only (60 Hz sine wave)
  • AC (transducer driven ±1% of full scale)
  • Tracking: ± 1 1/2% DC; ± 2% AC ; vertical mounting
  • Repeatability: ± 0.5% DC and rectifier type
  • Shock resistant Pivot and jewel movement
  • UL, CSA and IP54 splash proof models available
  • Conforms to ANSI C39.1
  • Optional LED Illumination
IIII [+] Models available
  • 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


  • Oil rigs, Control rooms, switchgear panel applications, boats or when visibility and readability is of prime importance
  • Ideal for adverse (dusty) environments
  • Rugged Movement ideal for rough environments


Yokogawa is a world leader in switchboard metering devices. As a global manufacturer of meter products for over 75 years, Yokogawa is able to incorporate decades of experience into the design and development of high quality products.

All Yokogawa AB/DB16 switchboards are UL/CSA recognized and are typically accurate to within ±1% of full scale. The 121 series offers interchangeable 250 degree linear scales with large numerals that provide greater resolution and make it easier to read values.

  • Literature
  • Specifications
Literature and Technical Information
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Switchboard Panel Meters

++ 121 Series | Specification sheet
Model: Yokogawa AB-16 and DB-16 (121 Series) 8 1/2" Switchboard Meter
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
DC Accuracy: ±1.0% of full scale
AC Accuracy: ±1.5% of full scale
General Specifications
Position of use: Vertical (scale) standard
or to specified angle or position
Full scale deflection angle: 250°
Full scale length: 13.8 inches
Scale plate: 1 piece stepped scale with graduations on the outer edge; numerals and legends on the inner scale.
Movement: High vibration Pivot and Jewel
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, metal cover with polycarbonate window.
Terminal plate: phenol resin material.
Mounting studs: 1/4” x 28 thread.
Terminal studs: 10-32 thread.
Dielectric level: 4000 VAC for 1 minute (case to input terminals)
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: 83⁄4" X 83⁄4"
Case Depth:

3.79" (4.89" with Studs)
+.84" for stud length

Case Diameter: 3.97"
Cut out Diameter 4.030"
Studs 2 Studs on bottom side of case
1.688" from mid-line of meter
3.375" between studs (Hor.)