> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# DMT-99 Digital Multimeter

**Type:** Product page · **SKU:** CE10550 · **Brand:** [FNIRSI](https://core-electronics.com.au/brands/fnirsi)
**Page:** https://core-electronics.com.au/fnirsi-dmt-99-intelligent-color-screen-digital-multi-meter.html ([markdown](https://core-electronics.com.au/fnirsi-dmt-99-intelligent-color-screen-digital-multi-meter.html.md))

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.

> ⚠ For extra-low-voltage circuits only (under 50 V AC or 120 V DC). Not for mains-voltage measurements.

## Pricing

- **Price:** $68.90 (inc GST) — $62.64 AUD, exc GST

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 5 today; more stock is typically available with a 8–25 day lead time.

## How to buy

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- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

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.

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/C/E/CE10550-1.jpg)