FNIRSI DMT-99 Intelligent Digital Multimeter

FNIRSI DMT-99 Intelligent Digital Multimeter

The FNIRSI DMT-99 digital multimeter is an advanced measurement tool that combines the accuracy of professional equipment with modern technological solutions. Equipped with a 2.4-inch TFT HD color screen, it supports automatic parameter recognition, data logging, and a monitoring mode with audible notifications. It offers a wide range of measurements: AC/DC voltage, current, resistance, capacitance, frequency, temperature (-55°C to 1300°C), neutral and phase wire detection (LIVE), NCV (Null Circuit Voltage) detection, and diode testing. Powered by a built-in 1500 mAh lithium battery, it provides up to 10 hours of operation, while True RMS functions, intelligent burnout protection, and a DIY interface make it an indispensable tool for electricians, electronics technicians, and DIY enthusiasts.

Crystal clear image – 2.4 inch TFT HD screen

The large, high-resolution TFT color display makes reading measurements incredibly easy and comfortable. The rich color palette and clear digits eliminate eye fatigue during prolonged use. Even in low light or at an angle, you can see every detail – no need to squint or use a flashlight to read the measurement results.

Automatic recognition and three operating modes – measure without any fuss

Forget about turning the dial and wondering which mode to choose. The automatic recognition function automatically identifies the measured parameter and selects the appropriate range. General mode handles all basic measurements, recording mode records measurement curves and minimum and maximum values in real time, and monitor mode acts as an electronic watchdog – audibly alerting you when a measurement exceeds or falls below a set threshold. This saves a huge amount of time and eliminates the risk of errors.

Record battery life – 10 hours of continuous operation

The built-in 1500 mAh lithium battery provides up to 10 hours of intensive operation on a single charge. Work all day on a construction site, in the field, or in the workshop without worrying about the device running out of battery at the most inconvenient moment. Charging via USB-C is quick and convenient – you can charge the multimeter from a power bank, phone charger, or in your car.

Precise True RMS Measurements

The True RMS function allows you to measure the true effective value of AC voltage regardless of the waveform. Conventional multimeters can exhibit significant errors when measuring distorted, non-sinusoidal signals – PWM generators, switching power supplies, inverters, and power tools can all be misleading. The DMT-99 with True RMS gives you the confidence that the result is accurate, which is crucial for professional diagnostics and repairs.

Neutral and Phase Detection (LIVE) and NCV – Safety Without Touching

The LIVE function allows you to use a single probe to detect which wire is live (phase) and which is neutral (neutral). You don't need two probes or to connect to the installation – simply bring the device close to the wire. Additionally, the NCV (Non-Contact Voltage) function detects the presence of alternating voltage in a cable or socket without the need for direct contact. An audible signal and a visual change in the magnetic field strength on the screen (four levels: none, low, medium, high) indicate the presence of voltage. This is the ideal tool for checking whether a wire is safe before starting work.

Temperature measurement from -55°C to 1300°C – from frost to heat

The built-in thermometer function with a wide measurement range makes the DMT-99 a versatile tool. You can check the temperature of electronic components, heat sinks, motors, furnaces, soldering irons, and air conditioning. Instant access to temperature measurement eliminates the need to carry a separate pyrometer or thermometer – you have everything in one device.

Full range of electrical measurements – all in one device

The multimeter measures AC and DC voltage, AC and DC current (up to 10A), resistance (10,000 counts), capacitor capacitance, signal frequency, and tests diodes and circuit continuity (with an audible signal). It's a complete diagnostic center in your pocket – you don't need separate current meters, ohmmeters, or capacitance meters. You read all parameters with a single device, speeding up your work and reducing the amount of equipment you have to carry.

Intelligent burnout protection – work safely

A built-in anti-burnout system protects the device from damage in the event of incorrect connection or exceeding the measurement range. 10A MAX FUSED fuses protect the current inputs, and an intelligent electronic circuit monitors measurement parameters. Even if you make a connection error, the multimeter won't burn out – saving you money on repairs and giving you peace of mind while working.

Hold and save data (HOLD) function – save important measurements

The HOLD/REL button freezes the current reading on the screen, so you can easily note the result, take a photo, or compare it with other measurements. There's no need to rush a reading or keep the probes connected longer than necessary. The data logging function allows you to record a series of measurements and analyze them later—ideal for documenting service work or quality control.

Solid construction and well-thought-out details – durability for years

The ABS plastic housing is resistant to drops, dust, and moisture. Reinforced corners absorb shock, protecting the delicate electronics inside. A foldable kickstand on the back allows you to position the multimeter at a comfortable angle on a table or in a switchboard. A belt clip makes it convenient to carry, and a hook on the back allows you to hang the device on a nail or hook in the workshop. The USB-C charging port is universal and convenient – one cable for all your devices.

DIY Interface and Auto Shutdown – A Tool Tailored to You

The DIY Boot Interface feature allows advanced users to create their own personalized interfaces and measurement functions. You can customize the screen layout, add custom measurement modes, and expand the device's functionality to suit your needs. Auto power-off saves battery life when you forget to turn it off. This open-ended approach to a tool that grows with your skills and requirements—an investment that will last. Whether you're a professional electrician, service technician, DIY enthusiast, or hobbyist, the DMT-99 will meet your expectations.

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