Martindale MM94 True RMS Digital Multimeter

The Martindale MM94 True RMS Digital Multimeter is built for electrical and industrial testing tasks where reliable readings matter. It delivers True RMS measurement for improved accuracy on complex waveforms. In addition, the meter combines a wide range of functions in one robust handheld instrument.

With AC and DC voltage measurement up to 1000V DC and 750V AC, the Martindale MM94 True RMS Digital Multimeter supports everyday fault finding and maintenance work. It also measures AC and DC current up to 20A for short-cycle measurements. Furthermore, the 60,000 count display provides clear results and includes an analogue bar graph for fast trend monitoring.

Designed for Professional Testing

Engineers can use this meter for voltage, current, resistance, capacitance, frequency and temperature measurements. The supplied K-type thermocouple extends testing capability across a wide temperature range. As a result, users can carry out multiple checks without changing instruments.

For demanding environments, the Martindale MM94 True RMS Digital Multimeter features a CAT IV 600V safety rating and a rugged overmoulded design. It also includes Min, Max and Peak measurement functions for capturing changing values. Meanwhile, the high-frequency rejection filter helps improve readings on distorted electrical signals.

Practical Features for Daily Use

Auto-ranging operation speeds up testing and reduces manual setup time. Relative mode allows easy comparison between measurements, while continuity and diode testing support routine electrical checks. In addition, the backlit display improves visibility in darker work areas.

Two different set types are available to suit different requirements. Each version is based on the same Martindale MM94 True RMS Digital Multimeter platform and provides dependable performance for professional electrical testing. The meter is also supplied with a two-year warranty for added confidence.

Key Features

True RMS measurement technology for improved AC accuracy
Auto-ranging operation for faster testing
60,000 count backlit display
Analogue bar graph for trend indication
CAT IV 600V safety rating
Min, Max and Peak measurement functions
Relative measurement mode
High-frequency rejection filter
Continuity testing with audible indication
Diode test function
Temperature measurement using K-type thermocouple
Overmoulded protective housing
Low battery indication
Auto power-off function after approximately 30 minutes
Suitable for electrical and industrial troubleshooting
Available in two different set configurations

Technical Specifications

Manufacturer	Martindale Electric
Manufacturer part code	MM94
Display	4½ digit 60,000 count LCD with analogue bar graph
AC voltage range	0.01mV to 750V ±1% rdg ±20 dgt
DC voltage range	0.01mV to 1000V ±0.08% rdg ±5 dgt
AC current range	0.01μA to 20A ±1.5% rdg ±20 dgt
DC current range	0.01μA to 20A ±0.5% rdg ±10 dgt
Continuous current	Maximum 10A continuous
Resistance range	0.01Ω to 60MΩ ±0.3% rdg ±20 dgt
Continuity	Audible indication below 40Ω
Frequency range	0.001Hz to 10MHz ±0.1% rdg ±10 dgt
Capacitance range	1pF to 6mF ±3.0% rdg ±10 dgt
Temperature range	-50°C to 1300°C
Temperature accuracy	±1% rdg ±1°C from 0°C to 400°C
Conductance	Up to 60nS
True RMS	Yes
Duty cycle	Yes
Safety category	CAT IV 600V
Standards	BS EN61010-1
Power management	Auto power-off after approximately 30 minutes
Warranty	2 Years

Comparison Table

Feature	MM65	MM67	MM94
AC/DC Voltage	Yes	Yes	Yes
AC/DC Current	Yes	Yes	Yes
Resistance and Continuity	Yes	Yes	Yes
Diode Test	Yes	Yes	Yes
Frequency Measurement	No	Yes	Yes
Capacitance Measurement	No	Yes	Yes
True RMS	No	Yes	Yes
Auto-ranging	Yes	Yes	Yes
Backlight	No	Yes	Yes
Overmoulded Holster	Yes	Yes	Yes
Additional Functions	None listed	Min/Max and Duty Cycle	Min/Max, Peak, Temperature, Duty Cycle and High Frequency Filter
Safety Rating	CAT III 600V	CAT III 600V	CAT IV 600V