Gossen Metrawatt M550S Insulation Tester, 50 V Min, 1 kV Max, 999 GΩ CAT II, CAT III, CAT IV

RS Stock No.:: 645-138
Mfr. Part No.:: M550S
Manufacturer:: Gossen Metrawatt

Gossen Metrawatt M550S Insulation Tester, 50 V Min, 1 kV Max, 999 GΩ CAT II, CAT III, CAT IV

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Subtotal (1 unit)*

TWD75,011.00

(exc. GST)

TWD78,761.55

(inc. GST)

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Units	Per unit
1 +	TWD75,011.00

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RS Stock No.:: 645-138
Mfr. Part No.:: M550S
Manufacturer:: Gossen Metrawatt

Specifications

Product overview and Technical data sheets

Legislation and Compliance

Product Details

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Select all	Attribute	Value
	Brand	Gossen Metrawatt
	Model Number	M550S
	Product Type	Insulation Tester
	Tester Type	Insulation Tester
	Maximum Test Voltage	1kV
	Minimum Test Voltage	50V
	Display Type	Backlight
	Test Current	1mA
	Power Source	8 Batteries (1.5 V AA)
	Battery Type	Alkaline manganese per IEC LR14 or rechargeable batteries (NiMH, 1.5 V migNon-cell (size AA)
	Minimum Operating Temperature	-10°C
	Insulation Testing Resistance	999GΩ
	Safety Category Level	CAT II, CAT III, CAT IV
	Safety Category Voltage	1kV
	Maximum Operating Temperature	50°C
	Length	225mm
	Height	140mm
	Width	130mm
	Standards/Approvals	DAkkS Calibration Certificate, DIN EN 61326-1, EN 60529, EN 1081, IEC/EN 61557, IEC/EN 61010-1, VDE 0470-1, VDE 0413
	Weight	1.5kg

	Select all
	Brand Gossen Metrawatt
	Model Number M550S
	Product Type Insulation Tester
	Tester Type Insulation Tester
	Maximum Test Voltage 1kV
	Minimum Test Voltage 50V
	Display Type Backlight
	Test Current 1mA
	Power Source 8 Batteries (1.5 V AA)
	Battery Type Alkaline manganese per IEC LR14 or rechargeable batteries (NiMH, 1.5 V migNon-cell (size AA)
	Minimum Operating Temperature -10°C
	Insulation Testing Resistance 999GΩ
	Safety Category Level CAT II, CAT III, CAT IV
	Safety Category Voltage 1kV
	Maximum Operating Temperature 50°C
	Length 225mm
	Height 140mm
	Width 130mm
	Standards/Approvals DAkkS Calibration Certificate, DIN EN 61326-1, EN 60529, EN 1081, IEC/EN 61557, IEC/EN 61010-1, VDE 0470-1, VDE 0413
	Weight 1.5kg

COO (Country of Origin):: DE

Gossen-Metrawatt Insulation Tester, 1000V Maximum Test Voltage, 999GΩ Insulation Testing Resistance - M550S

This insulation tester is a handheld instrument designed to measure electrical insulation resistance across a wide voltage range for field and workshop diagnostics. It operates between low and high test voltages and is intended for routine verification of insulation integrity in industrial environments. The unit includes a backlit display for visibility in low light and accepts standard battery types for portable use.

Features and Benefits:

• *Made in Germany - including DAkkS calibration certificate
• 1000 V Maximum Test Voltage delivers high-voltage insulation checks
• 50 V Minimum Test Voltage enables low-voltage diagnostics
• 999 GΩ Insulation Testing Resistance detects very high resistance levels
• 1 mA Test Current supports controlled measurement loading
• Backlit display improves readability in dim conditions

Applications

• Suitable for electrical maintenance in industrial installations
• Ideal for commissioning of power distribution equipment
• Used for periodic insulation checks on motors and cables
• Can be used for site troubleshooting under varied temperatures
• Appropriate for portable on-site resistance verification tasks

What power options are available for field operation?

It runs on eight 1.5 V AA cells and accepts alkaline or NiMH rechargeable batteries.

What safety categories does it meet for use on distribution systems?

The instrument is rated for CAT II, CAT III and CAT IV environments.

What temperature range can it operate within?

It functions between -10 °C and 50 °C for typical site conditions.

How Compact and transportable is the unit for on-site work?

The tester weighs 1.5 kg and its form factor supports portable use.

What standards and calibration documentation are associated with the instrument?

It is supplied with DAkkS calibration and complies with DIN EN 61326-1, EN 60529, EN 1081, IEC/EN 61557, IEC/EN 61010-1, VDE 0470-1 and VDE 0413.