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DMT-99 Digital Multimeter

SKU: CE10550 Brand: FNIRSI

Visualise transient signals and log data with precision using the FNIRSI DMT-99 Digital Multimeter. This 10,000-count True RMS tool features a 2.4-inch colour TFT display and real-time curve plotting for advanced circuit diagnostics and monitoring.

$62.64 AUD, inc GST

$62.64 AUD, exc GST

In stock, ships same business day if ordered before 2PM
Fastest delivery: Tomorrow* Disclaimer:
For next-day delivery, the shipping address must be in the AusPost next-day network, eParcel Express must be selected, and the order must be placed before 2PM AEST Mon-Thurs excluding NSW Public Holidays. Orders may be delayed due to AusPost pickup timings and order verifications. eParcel Express is typically a 1-day service within the AusPost next-day network, though it is sometimes 2+ days.

A 10,000-count digital multimeter that brings data visualisation to your handheld toolkit.

Unlike standard multimeters that only show a snapshot value, the DMT-99 features a 2.4-inch full-colour TFT display capable of plotting measurement curves over time. This means you can still perform basic testing and data logging, but also extend a multimeter's capability to see stability and drift that a simple numerical display might miss.

For makers and technicians, spotting slow-moving fluctuations—like battery voltage sag under load or temperature drift—can be frustrating with a standard screen. The DMT-99 solves this with its dedicated "Record" and "Monitor" modes. These allow you to set high/low thresholds with audible alarms for hands-free circuit monitoring, or view a real-time graph to track signal stability over seconds or minutes.

Designed for reliability, the unit is powered by a built-in 1500mAh rechargeable lithium battery, eliminating the need for disposable 9V cells.

Key Features

Visualise signal stability with the "Record Mode" graph, which plots voltage or current trends over time - ideal for spotting voltage sag or irregular sensor drifts (Note: this is a trend logger, not a high-speed oscilloscope).
Monitor hands-free using "Monitor Mode," which lets you set custom maximum and minimum thresholds; the device will sound an alarm if readings drift outside your defined safe limits.
High-resolution readings with 10,000-count True RMS precision provide more granular data than standard 2,000 or 6,000-count meters, essential for sensitive low-voltage electronics.
Streamline operations with Intelligent Auto-Recognition, which automatically detects voltage, resistance, or continuity connections to prevent range selection errors.
Eco-friendly power via the integrated 1500mAh lithium battery (USB-C rechargeable), offering up to 10 hours of runtime and reducing battery waste.
Built-in safety featuring CAT III 1000V protection, dual ceramic fuses, and software-driven anti-burn protection to guard against accidental overloads.

Technical Specifications

Property	Specification
Display Type	2.4" TFT Full-Colour (240 x 320)
Counts	10,000 Counts (True RMS)
Special Modes	Record (Graphing), Monitor (Threshold Alarms)
DC Voltage Range	9.999V / 99.99V / 999.9V (±0.5% + 3)
AC Voltage Range	9.999V / 99.99V / 750.0V (±1.0% + 3)
Current Range (DC/AC)	9999μA to 9.999A (±1.2% - 1.5% + 3)
Resistance Range	999.9Ω to 99.99MΩ (±1.5% + 3)
Capacitance Range	9.999nF to 99.99mF (±2.0% - 5.0% + 20)
Frequency Range	9.999Hz to 9.999MHz (±0.1% + 3)
Temperature Range	-55°C to 1300°C (-67°F to 2372°F)
Power Source	1500mAh Lithium Battery (USB-C Rechargeable)

Notes

Only perform measurements on ELV circuits, and have a licensed electrician perform work on mains or higher voltage circuits.

This product is listed in:

Test Equipment>Multimeters

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We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):

$3+ for Stamped Mail (typically 10+ business days, not tracked, only available on selected small items)
$7+ for Standard Post (typically 6+ business days, tracked)
$11+ for Express Post (typically 2+ business days, tracked)
Pickup - Free! Only available to customers who live in the Newcastle region (must order online and only pickup after we email to notify you the order is ready). Orders placed after 2PM may not be ready until the following business day.

Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.

Some batteries (such as LiPo) can't be shipped by Air. During checkout, Express Post and International Methods will not be an option if you have that type of battery in your shopping cart.

International Orders - the following rates are for New Zealand and will vary for other countries:

$12+ for Pack and Track (3+ days, tracked)
$16+ for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount will increase based on the weight of your order.

Our physical address (here's a PDF which includes other key business details):

40 Aruma Place
Cardiff
NSW, 2285
Australia

Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.

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