Martindale VT25 Two Pole Voltage & Continuity Tester

The Martindale VT25 Two Pole Voltage & Continuity Tester gives electricians a dependable way to check voltage and continuity in one compact instrument. It measures AC and DC voltages from 12V to 690V and provides bright LED indication for fast readings. The tester also includes an automatic power-off function to help extend battery life.

Designed for daily use, this tester offers more than basic voltage checks. It carries out continuity testing with both an LED and buzzer, making circuit verification quick and simple. In addition, the built-in white LED torch improves visibility when working in dark spaces and control panels.

Advanced Testing Functions

Beyond standard measurements, the Martindale VT25 Two Pole Voltage & Continuity Tester performs single pole phase testing from 100V to 690V AC. It also carries out phase rotation testing between 120V and 400V AC, helping users identify phase sequence with ease. These added functions make it suitable for a wide range of electrical installation and maintenance work.

Safety remains a key part of the design. The instrument complies with BS EN 61243-3 and GS38 requirements and includes removable probe caps for additional protection. A double insulated 1.2m cable features a contrasting inner layer that provides a visual warning if damage occurs.

Practical Design for Everyday Use

The Martindale VT25 Two Pole Voltage & Continuity Tester has a compact and lightweight body that fits comfortably into a tool bag. Its IP64 protection rating helps guard against dust and water splashes, making it suitable for demanding site conditions. The tester operates from two AAA batteries and weighs only 130g with batteries fitted.

Two set options are available to suit different requirements. The standard VT25 includes the tester, batteries and probe tip covers, while the VT25PD kit adds a proving unit and a carry case for complete compliance with Electricity at Work Regulations. This flexibility allows users to choose the package that best matches their needs.

Key Features

Measures AC and DC voltage from 12V to 690V
Provides bright LED voltage indication levels
Performs continuity testing with LED indication
Includes an audible buzzer during continuity checks
Carries out single pole phase testing
Supports phase rotation identification
Built-in white LED torch for dark environments
Automatic power-off helps preserve battery life
Supplied with removable GS38 probe tip covers
Double insulated cable with damage warning layer
Compact and lightweight handheld design
Suitable for electrical installation and maintenance work
Available as a standard tester or VT25PD kit set
Complies with current electrical safety standards

Technical Specifications

Manufacturer	Martindale Electric
Manufacturer part code	VT25
Voltage measurement range	12V to 690V AC/DC
Frequency range	DC and 16Hz to 400Hz
LED indication thresholds	12V, 24V, 50V, 120V, 230V, 400V and 690V
Internal impedance at ELV AC	260kΩ
Response time	Less than 1 second to 100% of nominal voltage
Test current	Less than 3.5mA
Duty ratio	30 seconds on and 240 seconds off
Overvoltage protection	690V AC or DC rms
Single pole phase test range	100V to 690V AC rms
Single pole phase test frequency	50Hz to 60Hz
Phase rotation test range	120V to 400V AC rms phase to earth
Phase rotation frequency	50Hz to 60Hz
Continuity range	0 to 500kΩ
Continuity test current	3µA
Operating temperature	-10°C to 55°C
Storage temperature	-20°C to 70°C non-condensing
Operating humidity	Less than 85% RH
Maximum altitude	2000m
Pollution degree	2
Power supply	2 x 1.5V AAA alkaline batteries
Cable length	1.2m
Dimensions	205 x 67 x 27mm
Weight	130g with batteries fitted
Ingress protection	IP64
Safety category	CAT III 1000V and CAT IV 600V
Standards compliance	BS EN 61243-3:2014, BS EN 61010-1 and GS38
EMC standard	BS EN 61326-1
Warranty	Not specified

Comparison Table

Feature	VT12	VT25	VT28
LED voltage indication	12-690V AC/DC	12-690V AC/DC	12-690V AC/DC
LCD voltage indication	–	–	10-690V DC and 16-400Hz AC
Continuity LED and buzzer	✓	✓	✓
Phase rotation	–	✓	✓
Single pole test	–	✓	✓
LED torch	–	✓	✓
BS EN 61010-1 safety rating	CAT III 690V CAT IV 300V	CAT III 1000V CAT IV 600V	CAT III 1000V CAT IV 600V
GS38 compliant	✓	✓	✓