Yokogawa 103131LS-MT7 Switchboard Panel Meter

Product Overview
The Yokogawa 103131LS-MT7 is an analog switchboard panel meter designed for accurate and reliable measurement of AC current in industrial and commercial power systems. It belongs to Yokogawa’s 103 Series, part of the AB40/DB40 family of heavy-duty switchboard meters known for precision, durability, and long service life. The unit features a large, easy-to-read analog scale with a wide 250° pointer deflection, making it suitable for monitoring current at a glance in control panels and switchgear applications.
Key Features
Type: Analog AC ammeter, transformer-rated (5 A secondary input)
Type: Analog AC ammeter, transformer-rated (5 A secondary input)
Series: Yokogawa 103 Series, AB40/DB40 switchboard meter family
Series: Yokogawa 103 Series, AB40/DB40 switchboard meter family
Scale Range: Customizable full-scale current range depending on the current transformer (CT) ratio (commonly 0–100 A, 0–200 A, 0–1000 A, etc.)
Scale Range: Customizable full-scale current range depending on the current transformer (CT) ratio (commonly 0–100 A, 0–200 A, 0–1000 A, etc.)
Accuracy: ±1% of full scale
Accuracy: ±1% of full scale
Deflection: 250° pointer movement for clear and precise readings
Deflection: 250° pointer movement for clear and precise readings
Input Frequency: 40 to 70 Hz
Input Frequency: 40 to 70 Hz
Case Material: Rugged, copper-free aluminum or steel case with protective front cover
Case Material: Rugged, copper-free aluminum or steel case with protective front cover
Mounting Style: Standard 4¼-inch switchboard mount (ANSI standard)
Mounting Style: Standard 4¼-inch switchboard mount (ANSI standard)
Operating Environment: Industrial-grade, suitable for continuous use in demanding electrical applications
Operating Environment: Industrial-grade, suitable for continuous use in demanding electrical applications
Standards: Designed to meet ANSI C39.1 and UL/CSA requirements
Standards: Designed to meet ANSI C39.1 and UL/CSA requirements
Applications
Electrical switchboards and distribution panels
Electrical switchboards and distribution panels
Industrial control systems
Industrial control systems
Power generation and substations
Power generation and substations
Marine and transportation power systems
Marine and transportation power systems
Factory automation and utility monitoring panels
Factory automation and utility monitoring panels
Retrofit or replacement applications using the 4¼-inch cutout standard
Retrofit or replacement applications using the 4¼-inch cutout standard
Construction and Design
The meter features a heavy-duty metal case designed for switchboard mounting, providing excellent mechanical strength and electromagnetic shielding. The high-contrast analog dial allows easy visibility from a distance, and the front cover helps protect against dust and moisture. The internal movement is precision-balanced for smooth pointer operation, ensuring long-term accuracy even under vibration or fluctuating load conditions.
Operating Notes
This model is transformer-rated and designed for a 5 A secondary input; actual current range depends on the CT used in the system.
This model is transformer-rated and designed for a 5 A secondary input; actual current range depends on the CT used in the system.
The “MT7” suffix denotes a specific range or scale configuration—confirm compatibility with your system before installation.
The “MT7” suffix denotes a specific range or scale configuration—confirm compatibility with your system before installation.
Ensure correct CT polarity and wiring when connecting to the meter.
Ensure correct CT polarity and wiring when connecting to the meter.
Proper panel cutout and clearance are required for installation.
Proper panel cutout and clearance are required for installation.
This model is part of a discontinued Yokogawa series, but replacement units and equivalents are still available as surplus or new old stock.
This model is part of a discontinued Yokogawa series, but replacement units and equivalents are still available as surplus or new old stock.

Weight: 7 lbs
Dimensions: 10 × 6 × 4 in