Smart Lightning Protection

Grounding Resistance Online Tester

Name: Grounding Resistance Online Tester
Brand: YESLON
SKU: fr-ground-online-tester
Price: 1 CNY
Availability: InStock

FR-01111-R

Through-core online grounding resistance measurement over 0.01Ω~200Ω with 0.001Ω resolution. The split-core model can be installed without disconnecting the grounding down conductor.

0.01~200Ω0.001ΩEx ib IIC T4

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Product Overview

Through-core online grounding resistance measurement over 0.01Ω~200Ω with 0.001Ω resolution. The split-core model can be installed without disconnecting the grounding down conductor.

Core capabilities

Non-contact through-core sensing: Split-core versions install without breaking the grounding down conductor.. High resolution: 0.001Ω resolution captures small changes in grounding resistance.. Flexible networking: RS485 or 4G upload supports remote monitoring and trend review..

Data Generated

0.01~200Ω0.001ΩEx ib IIC T4

Product Features

Non-contact through-core sensing

Split-core versions install without breaking the grounding down conductor.

High resolution

0.001Ω resolution captures small changes in grounding resistance.

Flexible networking

RS485 or 4G upload supports remote monitoring and trend review.

Explosion-proof certified

Ex ia IIB T3 Ga / Ex ib IIC T4 Gb ratings.

Several mounting styles

Wall mount, on the grounding conductor, closed-loop or split-core.

Wide supply voltage

DC 9V~24V external supply.

System Topology

Technical Parameters

Technical Data

Grounding resistance range 0.01Ω ~ 200Ω Resolution 0.001Ω Measurement method Through-core (closed-loop / split-core) Communication RS485 / 4G Power supply DC 9V ~ 24V Explosion-proof rating Ex ia IIB T3 Ga / Ex ib IIC T4 Gb

Grounding resistance range	0.01Ω ~ 200Ω
Resolution	0.001Ω
Measurement method	Through-core (closed-loop / split-core)
Communication	RS485 / 4G
Power supply	DC 9V ~ 24V
Explosion-proof rating	Ex ia IIB T3 Ga / Ex ib IIC T4 Gb
Mounting	Wall mount / on grounding conductor / closed-loop / split-core
Display	LCD (type C)
Applications	Petrochemical plants, fuel stations, substation grounding grids
Degree of protection	IP65

Installation Instructions

Standard 35 mm DIN rail mounting; terminals: supply side L1/L2/L3, N, PE, communication and signal terminals as marked on the device.

Key Points

FAQ

How do I choose between split-core and closed-loop models?

A split-core model clamps around the down conductor and can be installed without disconnecting it, which suits retrofit sites. A closed-loop model requires the conductor to be threaded through it, and gives better stability and consistency.

What are the range and resolution?

Grounding resistance is measured over 0.01Ω~200Ω with a resolution of 0.001Ω. The same range and resolution apply to the models FR-01111-R, FR-01111-G and FR-12021-R.

What explosion-proof ratings are available?

The tester is rated Ex ia IIB T3 Ga and Ex ib IIC T4 Gb. Both ratings allow installation in flammable and explosive areas such as petroleum, chemical and fuel station sites.

How is measurement data uploaded to a platform?

Data is uploaded over RS485 or 4G and can also be read locally from the unit. Remote platform monitoring allows the grounding resistance history to be reviewed.

What certification applies and how is pricing provided?

Certification is held through a CE / CMA / CNAS accredited laboratory. Price and lead time are quoted per model; Request a quote with the model code, communication type and mounting style.

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