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Velleman 40MHz Handheld Pocket Oscilloscope

Code: N55JN

Velleman 40MHz Handheld Pocket Oscilloscope is rated 3.1 out of 5 by 7.
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  • 40MHz samples/sec in real time
  • Bandwidth up to 10MHz
  • Full auto range option (or manual)
  • Limited stock may be available in some stores. Call us on 0844 557 6000 to check

Product details

Velleman 40MHz Handheld Pocket Oscilloscope

• 40MHz samples/sec in real time
• Bandwidth up to 10MHz
• Full auto range option (or manual)
• Sensitivity down to 0.1mV
• Signal markers for amplitude, frequency and time
• Memory hold function and hold function
• Direct audio power measurement
• Up to six hours operation on full charge
• USB battery charger included
• Requires a scope probe, Order Code AQ58N
• Replacement rechargeable battery available, Order Code N72KF

The HPS140 Handheld Pocket Scope is a powerful and reliable oscilloscope that delivers a high sensitivity level of 0.1mV. It features an impressive 40 mega samples/sec in real-time, 10MHz bandwidth, full auto and manual range option, direct audio power measurement, signal markers for amplitude, time memory, and hold function. This portable oscilloscope can be charged via a USB port, car or mains socket.
It is suitable for anyone working with electronics, components and associated devices, including students, automotive and communication technicians. Amateur electronics enthusiasts will also find the HPS140 Handheld Pocket Scope very useful for a variety of applications – from examining signal waveforms to observing distortion or ringing, comparing levels in AC or audio circuits and checking alternator ground paths for noise.
Bandwidth: Up to 10 MHz (-3dB or -4dB at selected ranges)
Input range: 1mV to 20V/division in 14 steps
Input coupling: DC, AC and GND
Real-time sample rate: Up to 40MS/s
AD resolution: 8 bits
Time base: 250ns to 1h per division
Readouts: DC, AC+DC,True RMS, dBm, Vpp, Min-Max. (±2.5%)
Auto set-up function (or manual)
Probe x10 readout option
Audio power measurement from 2 to 32 ohms
Hold & store function
Time and Voltage markers readout
Max. 100Vp AC+DC
White LED backlight
For use on CLASS II pollution degree II installations
Operates on NiMH rechargeable battery pack (included)
Operates up to 6 hours on one charge
Charging power supply: 9Vdc/200mA
Dimensions: 74 x 114 x 29mm / 2.9 x 4.5 x 1.14"
Rated 5 out of 5 by from A Great little tool. Don't expect the features of an expensive scope, but it has triggering, X/Y cursors and save/restore. The auto-setup mode is great for quick analysis of problems. The 4 button interface is quite easy to learn, but there's no 'back' button (you just have to wait for the menu to disappear) so is sometimes a bit frustrating. If only you could get the data onto a PC it would be perfect!
Date published: 2011-05-27
Rated 4 out of 5 by from Pretty smart and just what I was looking for. The menu system is not too hard to manage and the displayed results on the screen are good for the outlay. Obviously, pay more money and you get a better machine but for the cash just the job.
Date published: 2011-11-07
Rated 4 out of 5 by from The item as delivered had a scratch on the inside of the screen and a 'noisy' trace. I had to do what I hoped to avoid, go to my nearest Maplin and change it. The new one does the job OK. I did buy a Maplin probe as it is smaller than my existing ones but it is not as good, test square wave not as square!
Date published: 2011-12-01
Rated 2 out of 5 by from No Probe Despite the moderator pointing out that the website clearly insists we purchase a probe, the box VERY CLEARLY states that a probe is included: The box has printed on it HPS140i — the all important 'i' denotes that a probe is included. As is explained in the writing at the bottom of the box. Ergo the probe is missing from the box!
Date published: 2014-03-03
Rated 1 out of 5 by from Poor quality 'scope, Supplied with no probe, so don't expect to use it from the box. moderator note: this is clearly stated on the item description on this page "Requires a scope probe, Order Code AQ58 " No graticule, no 'realtime' display at audio frequencies, poor contrast on display. Over all - download a freebie scope program for your desk/lap top and use that. Much more effective, useful, satisfying and money saving.
Date published: 2011-03-25
Rated 3 out of 5 by from I was very pleased with the performance of the HPS140 but today I have sent it back because the battery fails to charge so it can only be used when powered through the charger. Rating would have been 4* without this failure.
Date published: 2011-05-19
Rated 3 out of 5 by from counter-intuitive scaling, fails to charge I got this to monitor TTL +-5 v triggers for a camera at 1 kHz, and found this device's interface extremely non-intuitive. It would have been helpful if it could at least show the instantaneous reading (say at 10 Hz so that the user could select the optimal scale. Also, the battery (a NiMH) does not hold the charge (after storage for a week) and requires to be plugged via USB at all times for the device to work. I ended up setting my values to 0.5 hz instead of the desired 1 kHz, and monitoring the voltages using a regular multimeter.
Date published: 2016-06-02
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1. Does it show Frequency in real-time? 2. What firmware (build)?

Asked by: Trident
This service is for frequently asked questions and does not allow two way communication, In order for us to best assist you with your technical issue please contact us on the details below : 0333 400 9757 or email
Answered by: Darren
Date published: 2016-09-28

Can it be used to measure pulse width modulation 24vdc @150 hz

Asked by: Rob1
Unfortunately we are unable to guarantee full compatibility for this item.
Answered by: Dominic
Date published: 2016-07-23

Can you plug a microphone into this directly?

Asked by: Winnie
No you can not plug a microphone into this directly.
Answered by: Billy
Date published: 2016-05-01

Can the velleman 40mhz scope be connected to a computer?

Asked by: ANDY
Unfortunately i am sorry but the item in question doesn't support use in you intended application.
Answered by: Darren
Date published: 2015-09-01

How good are they for cars 

Asked by: Ben1
Yes they are very good , I have emailed the user manual for your perusal featuring the spec of this item.
Answered by: Darren
Date published: 2015-07-28
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Bulk Prices

Item code Item name Quantity Price
N55JN Velleman 40MHz Handheld Pocket Oscilloscope (1+) £129.99

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