Martindale TEK402 Continuity Tester 50μA, Model TEK 402

RS Stock No.:: 255-604
Mfr. Part No.:: TEK402
Brand:: Martindale

Martindale TEK402 Continuity Tester 50μA, Model TEK 402

Subtotal (1 unit)*

£38.76

(exc. VAT)

£46.51

(inc. VAT)

FREE delivery for orders over £50.00

In Stock

124 unit(s) ready to ship
Plus 178 unit(s) shipping from 21 August 2025

Need more? Click ‘Check delivery dates’ to find extra stock and lead times.

Units	Per unit
1 +	£38.76

*price indicative

RS Stock No.:: 255-604
Mfr. Part No.:: TEK402
Brand:: Martindale

Continuity Checkers TEK 402/TEK 404

TEK 402/404 are compact, versatile, battery powered instruments suitable for use in noisy environments. The tough construction makes it ideal for industrial and commercial environments including low voltage signalling, process control and training or educational applications. The loud 85 dB buzzer makes it ideal for use in noisy environments where many continuity buzzers, multimeters or 17th Edition multi function testers cannot be heard.

TEK404 can be used for the same low voltage applications as the TEK402. But the TEK 404 is also suitable for use in CAT II and CAT III environments. There is an additional safety feature which pulses to alert the user when connected to live circuits >30 V ac. There is a convenient belt clip and the TEK404 is supplied with CATIII 600 V rated TL47 test leads.

Features and Benefits

• Dimensions: 50 x 64 x 30 mm

• Weight: approx. 260 g

• Belt Clip: On rear face

• Power Supply: 9 V, MN1604 / PP3 alkaline battery

TEK 402

• Audible indication

• Probe Voltage: 2.2 V dc

• Test Current: < 50 μA across short circuit

• Continuity Range (audible): 2.2kΩ +/- 10%

• Audible Output Level: 85 dB minimum at 30 cm with 0Ω continuity resistance

• Compliance: BS EN61010-2001, CAT I 50 V Peak. Not for use in CAT II, III or IV environments

TEK 404

• Audible and visual indication, plus overvoltage protection

• Probe Voltage: 2.2 V dc

• Test Current: <50 μA across short circuit

• Continuity Range: 2.2kΩ +/- 10%

• Audible Output Level: 85 dB minimum at 30 cm with 0Ω continuity resistance

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

• Alarm Function: Pulsed buzzer and LED indication if unit is connected to live circuit voltage >30 V ac or >30 V dc +/- 20 V

• Supplied with test leads (TL47), insulated crocodile clips and MN1604 battery

• Ingress: IP40

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

Supplied with

Belt Clip

Continuity Checkers

Ideal for testing low resistance paths, but will also give a lower level output for higher path resistance
Rugged yellow ABS with pocket clip
Probe voltage 9V, test current 5mA
Requires 1xPP3 battery (RS Stock No 394-9059)

TEK 402/TEK 404

TEK 402: - with audible indication.

TEK 404: - with audible & visual indication, plus overvoltage protection.

Supplied with

Test leads.

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Martindale
	Test Current	50µA
	Visual Indicator	No
	Audible Alarm	Yes
	Display Type	LED
	Probe Voltage	2.2V dc
	Battery Type	9V
	Power Source	Battery
	Weight	260g
	Dimensions	50 x 64 x 30mm
	Height	30mm
	Length	50mm
	Width	64mm
	Model Number p	TEK 402

	Select all
	Brand Martindale
	Test Current 50µA
	Visual Indicator No
	Audible Alarm Yes
	Display Type LED
	Probe Voltage 2.2V dc
	Battery Type 9V
	Power Source Battery
	Weight 260g
	Dimensions 50 x 64 x 30mm
	Height 30mm
	Length 50mm
	Width 64mm
	Model Number p TEK 402

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Martindale TEK402 Continuity Tester 50μA, Model TEK 402

FREE delivery for orders over £50.00

Continuity Checkers TEK 402/TEK 404

Features and Benefits

TEK 402

TEK 404

Supplied with

Continuity Checkers

TEK 402/TEK 404

Supplied with

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