Earthing Measuring Instruments Selection Guide: Technical Criteria & Application Standards
Earthing Measuring Instruments selection guide: technical parameters, mounting and compliance standards, and Unit comparison.
An earthing measuring instrument, also known as an earth megger, is a test device that measures the earthing resistance of an installation in ohms. It is used to document the resistance value in commissioning measurements and periodic inspections of the earthing of buildings, transformers, enclosures and lightning rods. This category lists Unit earth meggers that measure with auxiliary stakes in a 3-wire or 4-wire configuration, and clamp-type earthing meggers that measure without driving stakes by clamping around the earthing conductor. Choose the measuring method according to the structure of the earthing system and whether the site allows stakes to be driven, the measuring range and resolution according to the expected resistance value, and the recording memory and the stakes and cable set supplied with the device according to the job. Clamp-type measurement gives a result only in systems where several earth electrodes are connected to each other and the measuring current can complete its circuit; for a single earth electrode not connected to another earthing, the stake method is required. An earth megger does not replace an insulation megger, which measures the insulation resistance of cables and windings at the megohm level. The Earthing Measuring Instruments category on Welibaba includes 10 active models from leading manufacturers such as Unit.
Key Technical Parameters for Selecting Earthing Measuring Instruments
To specify the right Earthing Measuring Instruments model for your panel or installation, verify the following parameters against your engineering schedule:
| Parameter | Typical Catalog Values | Verification Note |
|---|---|---|
| Auto Power Off | Var, Yaklaşık 10 dakika, Yaklaşık 15 dakika, Yaklaşık 5 dakika | Verify against project schedule and load calculation |
| Gram | 1.18 kg, 1.32 kg, 1100 g, 1180g(piller dahil) | Verify against project schedule and load calculation |
| Memory | 20 kayıt, 200 kayıt, 30 kayıt, 300 | Verify against project schedule and load calculation |
| Power Source | 1.5V pil (LR6) x 4, 4 × 1, 5 V pil (LR6), 6 × 1 | Verify against project schedule and load calculation |
Installation, Compatibility, and Commissioning Checklist
- Electrical & Mechanical Matching: Confirm that rated voltage, current capacity, and mounting dimensions align with the upstream and downstream components in Measuring Instruments.
- Environmental & Enclosure Rating: Check IP protection class, housing material, and terminal capacity for dusty, humid, or high-vibration industrial environments.
- Related Product Groups: If your application calls for a different form factor or rating, compare sibling categories such as LED Bulb Test Stands, Ammeters and Voltmeters, Electrical and Electronic Testers.
Frequently Asked Questions
What is the first parameter to check when selecting Earthing Measuring Instruments?
Start by confirming the circuit's rated electrical values and physical mounting dimensions, then use the technical attribute filters on the Earthing Measuring Instruments page to narrow down compatible series.
Which Earthing Measuring Instruments brands are available on Welibaba?
Welibaba currently stocks 10 active models in this category from manufacturers including Unit, complete with verified specifications and unit pricing.
How can I compare Earthing Measuring Instruments models by manufacturer part number?
You can search directly by manufacturer SKU/order code or use the category filter panel to compare equivalent models across brands side by side.