Portable mini oscilloscope Fnirsi DSO152 — 2 channels, 1 MHz bandwidth, handheld

The FNIRSI DSO152 is a compact portable mini oscilloscope intended for mobile service, workshop and educational use. It combines a 2.8" display, a built-in 1,000 mAh battery and a pocket-sized enclosure (99 × 68.3 × 19.5 mm) to provide basic waveform visualization and measurement in field conditions. The device supports sampling up to 2.5 MS/s, a bandwidth of 200 kHz, and measurement ranges that allow measurements up to ±400 V on the X1 probe setting. FNIRSI DSO152 is supplied with a probe with crocodile clamps, a charging cable and a user manual.

Advantages

The oscilloscope offers true 2.5 MS/s sampling and 200 kHz bandwidth for reliable recording of voltage signals, plus a built-in 1 kHz rectangular calibration source to verify probe response. One-button automatic measurement selection and simple, responsive controls reduce setup time and make basic diagnostics faster. Its light weight (100 g), compact dimensions and an integrated fold-out leg enable hands-free positioning and convenient use in confined spaces. A USB‑C port supports 5 V/1 A charging and firmware updates via a standard cable.

Suitable for

• Field diagnostics and on-site repair of household appliances and automotive electronics
• Workshop troubleshooting of power and pulse circuits
• Educational labs and electronics training
• Hobbyist and DIY electronics projects

Key specifications

• Manufacturer: FNIRSI
• Model: DSO152
• Sampling frequency: 2.5 MS/s
• Bandwidth: 200 kHz
• Vertical sensitivity: 10 mV/Div – 20 V/Div (1‑2‑5 steps)
• Voltage range: X1: ±400 V (Vpp 800 V); X10: ±40 V (Vpp 80 V) — as specified
• Trigger: Auto / Normal / Single
• Coupling: AC / DC
• Display: 2.8 inches, 320 × 240 px
• USB charging: 5 V / 1 A (USB‑C)
• Battery: lithium, 1000 mAh
• Internal test frequency: 1 kHz, 50% duty cycle
• Dimensions: 99 × 68.3 × 19.5 mm
• Weight: 100 g

How to use

Connect the probe to the input and, if required, attach the crocodile clamp to the reference point. Power the oscilloscope via the built‑in battery or by connecting a 5 V/1 A USB‑C power source. Use the responsive buttons and the slider to set vertical and horizontal scales, choose coupling (AC/DC), and select trigger mode (Auto/Normal/Single). Use the built‑in 1 kHz rectangular signal to calibrate and verify the probe before measurements. For measurements near mains voltages use the appropriate probe attenuation and observe safety precautions for high-voltage work.

Usage recommendations

Use the X10 probe setting or an appropriately rated attenuating probe when measuring high voltages; ensure probe grounding and safe distance when working on live 220 V installations. Regularly update device firmware via the USB‑C port to maintain measurement stability and access improvements.