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Extech
Extech MS420 20MHz Digital Oscilloscope
Quote on request
No online payment · add lines to RFQ BOM
Handheld 20 MHz 2-ch DSO. 100 MS/s; built-in DMM. RFQ + selection help.
Download datasheet PDF
RFQ cart holds BOM lines only. Submit for engineering quote.
Key parameters
Display
3.8 in (96–97 mm) color LCD; 320×240 pixels
Bandwidth
20 MHz
Real Time Sample Rate
100 MS/s
Channels
2
Record Length
6K points per channel
Risetime
17.5 ns
Fits electronics and electrically controlled system troubleshooting where you need an Extech MS420 handheld 20 MHz dual-channel DSO with auto-set, FFT, and built-in DMM functions.
Key advantages
- 20 MHz dual-channel DSO — Handheld digital oscilloscope with auto-set for stable waveform display
- Sampling / memory — 100 MS/s real-time; 6K points per channel; 50 ns glitch capture (Peak Detect)
- Analysis — XY mode; FFT; waveform math; average and persistence modes; 20 automatic measurements
- Built-in DMM — True-RMS AC/DC V/A, resistance, capacitance, diode/continuity on 3.8 in color LCD
- Storage / USB — Store/recall up to 4 waveform screens and setups; USB interface with PC software
Typical applications
- Field or bench troubleshooting of electronics and machine controls.
- Glitch capture and FFT component-frequency checks.
- Jobs needing a portable scope plus basic DMM in one tool.
Selection guide
- Bandwidth — 20 MHz (MS460 is a 60 MHz sibling if higher BW is required)
- Vertical / timebase — 5 mV–5 V/div; 5 ns–5 s/div
- Safety — CAT II rated; max input 400 V peak
- Kit — two 1X/10X probes, test leads, USB software/cable, hard case (typical OEM kit)
Common mistakes
- Expecting 60 MHz bandwidth — that is MS460, not MS420.
- Using on CAT III/IV power distribution — MS420 is CAT II class.
- Assuming deep memory like lab DSOs — record length is 6K points/channel.
When to RFQ / what to tell us
- MS420 vs higher-bandwidth sibling if needed.
- Quantity; ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 12349 |
| Brand | Extech |
| Model | MS420 Digital Oscilloscope |
| Product type | Digital Oscilloscope |
| Bandwidth | 20 MHz |
| Sample rate | 100 MS/s real-time; risetime 17.5 ns |
| Channels / memory | 2 channels; 6K points per channel; vertical 5 mV–5 V/div; 8-bit |
| Display | 3.8 in (96–97 mm) color LCD; 320 × 240 pixels |
| Glitch capture | Peak Detect 50 ns glitch capture |
| DMM | True-RMS AC/DC V/A, resistance, capacitance, diode/continuity |
| Interface | USB with PC software; store/recall 4 screens/setups |
| Safety | CAT II; max input 400 V peak; 1 MΩ/20 pF input |
Documents
FAQ
Q: Bandwidth and sample rate? A: 20 MHz bandwidth; 100 MS/s real-time.
Q: Does it include a DMM? A: Yes — true-RMS multimeter functions on the same display.
Q: What should I send for a quote? A: Quantity and ship-to; note if you need higher bandwidth.
Links
| Parameter | Value |
|---|---|
| Display | 3.8 in (96–97 mm) color LCD; 320×240 pixels |
| Bandwidth | 20 MHz |
| Real Time Sample Rate | 100 MS/s |
| Channels | 2 |
| Record Length | 6K points per channel |
| Risetime | 17.5 ns |
| Glitch Capture | 50 ns peak detect |
| Vertical Sensitivity | 5 mV to 5 V/div; 8-bit resolution |
| Timebase Range | 5 ns to 5 s/div |
| Trigger Modes | Free Run, Single Shot, Edge, Video; source CH1/CH2; AC/DC coupling |
| Input Impedance | 1 MΩ / 20 pF |
| Functions | Auto-set, XY, FFT, waveform math (+−×÷), average, persistence, store/recall 4 screens |
| Interface | USB with Windows software for waveform transfer |
| Safety | CAT II rated handheld scope with DMM functions |