The Martindale TEK404 continuity tester adds a visual indication as well as audible indication and comes complete with a belt clip. Featuring a bright LED, the TEK404 also has a safety measure to prevent use on live circuits and a loud buzzer for use in noisy environments.

The tough construction and simplicity makes it ideal for use in a wide variety of applications including low voltage signalling, process control and educational.

The Martindale TEK404 is supplied with test leads, battery & instruction manual.

Probe Voltage

2.2V DC

Test Current

< 50µA across short circuit

Continuity Range

2.2kΩ +/- 10%

Audible Output Level

85dB minimum at 30cm with 0Ω continuity resistance

LED Indication

Bright Orange LED, buzzer and LED intensity reduce with increasing continuity resistance

Alarm Function

Pulsed buzzer & LED indication if unit is connected to live circuit voltage >30V AC or >30V DC +/- 20V

General Specifications

Ingress: IP40

Power Supply: 9V, MN1604 / PP3 alkaline battery

Compliance: BS EN61010-2001, CAT III 600V overvoltage

Dimensions: 50 x 64 x 30mm

Weight: approx 260g

Belt Clip: On rear face

Supplied with test leads (TL47), insulated croc clips & MN1604 battery

Martindale TEK404 Specification Sheet

Martindale TEK404 Instruction Manual