Testo 5907603 Digital Multimeter Cat Iii 1000V Cat Iv 600V

Product Description

The TESTO 5907603 is a full-size digital multimeter rated for CAT III 1000V and CAT IV 600V environments, designed for licensed electricians and HVAC technicians who need accurate, reliable electrical measurements in demanding field conditions. It delivers true RMS (TRMS) AC response for accurate readings on non-sinusoidal waveforms, making it well suited for variable-frequency drives and modern electronic loads. The meter carries an IP64 rating, providing protection against dust ingress and water splashing from any direction. It measures AC and DC voltage up to 1000V, AC and DC current up to 10A, resistance, capacitance, frequency, and temperature in both degrees F and degrees C.

The 5907603 is built for residential and commercial electrical service work, HVAC system diagnostics, and general trade applications where a full-size, safety-rated multimeter is required. Its measurement range starts as low as 0.1 mV for voltage and 0.1 microamps for current, giving technicians the resolution needed for low-signal troubleshooting alongside high-voltage measurements. The broad parameter set — including capacitance and temperature — reduces the number of tools a tech needs to carry to a job site.

Key Features

• TRMS AC response for accurate readings on distorted or non-sinusoidal waveforms
• CAT III 1000V and CAT IV 600V safety ratings for use in high-energy electrical environments
• IP64-rated enclosure resists dust and water splash for field durability
• Measures AC voltage, DC voltage, AC current, DC current, resistance, capacitance, frequency, and temperature
• Temperature measurement in both degrees F and degrees C
• Minimum resolution of 0.1 mV (voltage) and 0.1 microamps (current) for fine-detail diagnostics

Compatibility

Designed as a general-purpose full-size digital multimeter suitable for electrical, HVAC, and mechanical trade applications requiring CAT III or CAT IV safety-rated test equipment.

Installation Notes

This instrument is intended for use by qualified electricians and licensed trade professionals familiar with electrical safety practices. Always de-energize circuits where permitted before connecting test leads, and verify the meter's CAT rating is appropriate for the installation category before making measurements. Follow NFPA 70E arc flash safety requirements and use properly rated test leads and personal protective equipment when working on energized systems.