01483 302 700


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GDM-400 & GDM-300

The GDM-300/400 Series Hand Held DMM are a compact, high precision, battery operated multimeter series designed to meet most of the daily needs for design engineers as well as service engineers. The GDM-300/400 series design is driven by mobile-oriented features, such as automatic power down to preserve battery life, a large backlight display for crisp viewing, a rotary selector switch and clear-cut push buttons to ease operation. 

The basic functions match the depth of bench-top multimeters: fuse-protected current input, true RMS for accurate AC measurements, Auto ranging, Duty cycle, and Relative mode. These compact, reliable, and economical devices are ideal for any engineer.

Key Features:

  • 4 1/2 Digits 19999 counts (GDM-452), 3 1/2 Digits 1999 counts (GDM-357/350B)
  • Manual Ranging, Continuity Beeper/Diode Test, Data Hold
  • hFE Test (GDM-350B)
  • Temperature Measurement (GDM-357/350B)
  • Capacitance (GDM-452/357)
  • Frequency Measurement (GDM-452)
  • 22000 Counts Auto/Manual Ranging (GDM-461)
  • 4000 Counts Auto/Manual Ranging (GDM-397/398)
  • 6000 Counts Auto/Manual Ranging (GDM-360)
  • Capacitance, Frequency Measurement
  • Continuity Beeper/Diode Test
  • High Energy Fuse for 10A Range
  • Data Hold/Relative Mode
  • True RMS (GDM-461/360)
  • RS232C (GDM-461/397/360)

Model Max. Display DC Voltage AC Voltage DC Current AC Current Auto Ranging
Analog Bar
Auto Power off
GDM-461 22000 1000V 750V 10A 10A  
GDM-452 19999 600V 600V 10A 10A  
GDM-397 4000 1000V 750V 10A 10A
GDM-360 6000 1000V 750V 10A 10A
GDM-398 4000 1000V 750V 10A 10A
GDM-357 1999 600V 600V 10A 10A  
GDM-350B 1999 250V 250V 10A 10A    


Caltest Instruments Ltd

4 Riverside Business Centre

Walnut Tree Close


Surrey GU1 4UG

United Kingdom

Tel: +44 (0) 1483 302 700

Fax: +44 (0) 1483 300 562

Email: sales@caltest.co.uk

Caltest have been providing power sources and test instrumentation solutions for over 17 years and are proud to represent a number of industry leading manufacturers.