FNIRSI DST-201 3-in-1 Digital Multimeter, Oscilloscope & DDS Generator – 19999 TRMS

Overview

The FNIRSI DST-201 is a compact, handheld toolkit built for practical electronics work, from quick field checks to detailed bench testing. It blends three core capabilities into a single device, offering a portable solution for measuring, visualizing signals, and generating test waveforms. The result is a versatile companion you can rely on for diverse tasks without juggling multiple instruments.

With a digital multimeter backbone rated up to 19,999 counts TRMS, the DST-201 handles AC/DC voltage, current, resistance, capacitance, frequency, diode testing, temperature, and continuity checks. It also provides logs for recent data points and convenient data hold, helping you track changes over time and compare measurements side by side. The device emphasizes ease of use through a dedicated function dial, auto range, and a practical live/neutral detection feature that enhances workflow safety during field work and repairs.

Key capabilities

• AC and DC voltage and current; resistance; capacitance; frequency; diode test; temperature; continuity
• Live/neutral detection and data hold for quick verification and reference
• Auto range and log of data points to streamline measurement sessions

Signal visualization and generation

• 1 MHz bandwidth handheld oscilloscope with 5 MSa/s sampling rate and up to 400 V max
• 10 mV/div – 10 V/div vertical sensitivity for busy circuits and precise waveform analysis
• DDS signal generator delivering 13 waveforms up to 10 kHz with adjustable amplitude from 0.1 V to 3.0 V

Design and usability

• 2.8-inch color TFT display with White/Black themes and adjustable brightness for comfortable viewing
• 3000 mAh rechargeable battery with USB-C charging and an auto power-off feature to conserve energy
• Convenient function dial for fast mode switching and stable handling in field or shop environments

In practice, you may use the DST-201 to compare thresholds during diagnostics, simulate simple signals for testing replacements, or verify circuit behavior while on the move. The device is designed to expand your testing repertoire in a single, portable package. While it offers broad capabilities, results depend on the task, setup, and environmental conditions, and it is not presented as a guaranteed outcome for every scenario.