Digital Multimeter 3in1 DM40B with Oscilloscope and Signal Generator, True RMS
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The DM40B device combines digital multimeter, oscilloscope, and signal generator in one compact orange casing. The multimeter with a display range of up to 49,999 digits measures both DC and AC voltage, current, resistance, capacitance, frequency, and temperature. It supports True RMS function and automatic range selection. The single-channel oscilloscope with a sampling rate of 50 MSa/s and a bandwidth of 10 MHz displays signal waveforms on a 3.5-inch touch IPS display with a resolution of 480 × 320 px. The built-in generator provides sine, triangle, sawtooth, and square signals for circuit testing.
Main Features:
- Multimeter with a display range of 49,999, True RMS measurement, automatic range selection for mV/V and µA/mA/A, and simultaneous measurement of AC+DC
- DC voltage from 500 mV to 1000 V DC with an accuracy of ±(0.03 % + 5 d), AC voltage from 500 mV to 750 V
- DC and AC current from 500 µA to 10 A through a single common socket A/mA/µA
- Resistance from 500 Ω to 50 MΩ, capacitance from 5 nF to 50 mF, frequency from 10 Hz to 50 MHz, temperature from -40 to 1000 °C
- Diode test with four-stage voltage drop evaluation and audible signal, continuity test up to 1 kΩ
- Relative measurement (REL), MAX/MIN value recording, data hold (HOLD), and trend graph with time base of 160/320/640 ms
- Oscilloscope with 10-bit ADC, 64 kpts memory, time base from 100 ns to 50 s, sensitivity from 10 mV to 10 V/div, input impedance of 1 MΩ and AC/DC coupling
- Triggering Auto/Normal/Single, rising/falling edge trigger, adjustable hold-off, and mathematical functions FFT and ABS
- Generator: sine, triangle, and sawtooth 1 Hz to 50 kHz at 0.5 to 3.0 Vpp; square 1 Hz to 50 kHz with duty cycle 0 to 100 % and 100 kHz to 10 MHz at 3.0 Vpp
- 3.5-inch touch IPS display with a resolution of 480 × 320 px
- USB-C interface for screenshot transfer and firmware updates, MCX oscilloscope input, and banana sockets
- Battery life of approximately 12 hours in multimeter mode and 10 hours in oscilloscope mode, automatic display dimming and shutdown
- Dimensions 140 × 83 × 25 mm, weight 260 g, operating temperature 0 to 40 °C and humidity up to 75 %
- Package contents: DM40B multimeter with stand and protective PVC cover, 1 pair of test probes, USB-C cable 1.2 m
The DM40B replaces three separate measuring devices on the workbench while taking up minimal space. Automatic range selection and simultaneous display of AC and DC components simplify measurements without manual adjustment. The 10-bit resolution oscilloscope is suitable for checking PWM signals, power supplies, and transient phenomena in low-frequency circuits. Weighing 260 g, with a stand and protective cover, the device is easy to use on the desk as well as outside the workshop. It is suitable for service technicians, electricians, students, and electronics enthusiasts.
Seller: DARON
Dispatched within 1 working day (Mon–Fri) – orders paid for by 14:00 Irish time are processed on the same working day.
Availability: In stock
Transit: 5–13 working days – transit takes place on working days (Mon–Fri).
In total, please allow 5–14 working days from payment of your order.
Delivery is only possible to addresses in Ireland.
Delivery to address: €1.59
Returns
Deadline: 30 days from receipt of the goods, without giving any reason
How: notify us of your withdrawal at info@lunzo.ie and send the goods by post to the returns address:
Rotonda Rene Descartes, Parcela 101 – Nave 3
28070 Alcala de Henares, Madrid
Spain
Once you have sent the parcel, send us the proof of dispatch with the tracking number to info@lunzo.ie – this lets us process your return as quickly as possible and refund you without waiting for the parcel to arrive.
Product condition: you can also return goods that have been used or unpacked, or that no longer have their original packaging or tags
Costs: you pay the postage for sending the goods back to Spain; we charge no return fee
Refund: within 14 days of receiving your notice of withdrawal; we may withhold the refund until the goods have arrived back or until you provide proof that you have sent them
Exchanges
Deadline: 30 days from receiving your parcel (exchange for a different size, colour or variant)
How: write to us at info@lunzo.ie, giving your order number and the variant you want – once we have checked that it is available, we will send you instructions for the exchange, including the address to which you should send the original item
Costs: you pay to send the original item back; the new variant will be sent to you at no further charge
Faulty or damaged goods
Period for claiming a fault: up to six years from delivery of the goods – within the first 30 days you can reject a faulty product and ask for a full refund, and for the first 12 months a fault is presumed to have been present on delivery
How: write to us at info@lunzo.ie and attach a photograph or a video of the goods – in most cases you do not have to send the goods back
Remedies: a replacement with a new item, a reasonable price reduction, or a refund of the full purchase price
You will find the details in Delivery and Payment, Returns and Exchanges, Faulty Goods.
Seller:
Changsha Helan International Trading Co., Ltd.
Address: Unit 27038, Commercial Block, North District, Mingfa International City, Wangcheng District, Changsha, Hunan, China
E-mail: caishengye11@outlook.com
Telephone: +86 188 7399 7598
Manufacturer:
Changsha Helan International Trading Co., Ltd.
Address: Unit 27038, Commercial Block, North District, Mingfa International City, Wangcheng District, Changsha, Hunan, China
E-mail: caishengye11@outlook.com
Telephone: +86 188 7399 7598
EU responsible person:
Synertrade FR SAS
Address: 9 rue du Bat d'Argent, 69001 Lyon, France
E-mail: info@syner-sarl.cn
Telephone: +33 7 74 55 50 06