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
- Brand:
- Gossen Metrawatt
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Subtotal (1 unit)*
£1,458.55
(exc. VAT)
£1,750.26
(inc. VAT)
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In Stock
- Plus 1 unit(s) shipping from 16 November 2026
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Units | Per unit |
|---|---|
| 1 + | £1,458.55 |
*price indicative
- RS Stock No.:
- 645-138
- Mfr. Part No.:
- M550S
- Brand:
- Gossen Metrawatt
Specifications
Technical Reference
Legislation and Compliance
Product Details
Find similar products by selecting one or more attributes.
Select all | Attribute | Value |
|---|---|---|
| Brand | Gossen Metrawatt | |
| Product Type | Insulation Tester | |
| Model Number | M550S | |
| 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) | |
| Insulation Testing Resistance | 999GΩ | |
| Minimum Operating Temperature | -10°C | |
| Safety Category Voltage | 1kV | |
| Safety Category Level | CAT II, CAT III, CAT IV | |
| Maximum Operating Temperature | 50°C | |
| 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 | |
| Height | 140mm | |
| Length | 225mm | |
| Weight | 1.5kg | |
| Select all | ||
|---|---|---|
Brand Gossen Metrawatt | ||
Product Type Insulation Tester | ||
Model Number M550S | ||
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) | ||
Insulation Testing Resistance 999GΩ | ||
Minimum Operating Temperature -10°C | ||
Safety Category Voltage 1kV | ||
Safety Category Level CAT II, CAT III, CAT IV | ||
Maximum Operating Temperature 50°C | ||
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 | ||
Height 140mm | ||
Length 225mm | ||
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
• 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
• 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.
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