# 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.

## 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)