Digital Clamp Meter - ACA, ACV, DCV, Ohm, Diode, Buzzer. The GCM-403 is digital clamp meter can measure AC/DC voltage, AC/DC current, resistance, diodes, continuity, capacitance, frequency and temperature.Tapered jaws, auto range, data hold, REL function and auto power off which makes it a superb tool for electricians. The GCM-407 is digital clamp meter with true RMS measurement. Featuring tapered jaws, a wide range (AC 600A/750V, DC 1000V max input), capacitance measurement as well as non-contact voltage sensing function and the ability to keep MAX/MIN or hold dataand automatically power down make the GCM-407 suitable for almost any cable measurement task. New Old Description GCM-403 GCM-302 Compared with the old model Advantages GCM-403 expanded measurement items: DCA/Capacitance/Temperature/Frequency Counter and expanded functionalities: REL, Data Hold Compared with the old model- Disadvantages Smaller GCM-403 Clamp which is only 28mm GCM-403 does not have Max Hold GCM-407 GCM-303 Compared with the old model- AdvantagesGCM-407expanded measurement items: Voltage Range/Capacitance and expanded functionalities : No Contact Voltage (AC only)/ Min Hold/REL/Backlight

Auto Range, Expect Current Measurement
Auto Power Off
Max Hold
True RMS Measurement (GCM-407)
(AC)600A/600V Max Input (GCM-403)
(AC)600A/750V Max Input (GCM-407)
Mini Size
High Accuracy
MAX Clamp Size: 28mm (GCM-403)

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