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Earth-Rite® PLUS

Static Grounding for Process Plant & Equipment

The Earth-Rite® PLUS ensures that equipment that could be charged through contact with charged liquids or powders, has a low resistance connection to a verified grounding point. It achieves this by continuously monitoring the resistance from the equipment to the verified ground, ensuring the ground path resistance is 10 ohms* or less.
A cluster of attention grabbing LED indicators provides operators with a GO / NO GO visual reference to verify the equipment is safely grounded. In addition to a visual reference point a pair of dry changeover contacts can be interlocked with the process to automatically halt the transfer of product should the Earth-Rite® PLUS detect that the equipment is not grounded, thereby eliminating a potentially hazardous situation.

The Earth-Rite® PLUS is supplied in three configurations. The primary configuration is with the electronics supplied in an XP explosion proof metal enclosure for installation in Division 1 locations (covering all material Classes and Groups as per NEC 500). The second configuration is with the electronics supplied in a static dissipative GRP enclosure for mounting in Division 2 locations. The third configuration enables sites install the indicator/monitoring unit in a Division 1 location with the power supply/relays installed in a Division 2 location or non-hazardous location. The electronics are supplied in separate static dissipative GRP enclosures. Refer to the illustration below.

The Earth-Rite® PLUS carries cCSAus, ATEX, IECEx and SIL 2 certification. Download the datasheets located on the top right hand corner of the page for more details. All units can be powered from a 110 V / 230 V AC supply or 12 V / 24 V DC supply.

Earth-Rite PLUS Zoning Options 

*Recommended Practice:

“Where the bonding/earthing system is all metal, the resistance in continuous earth paths typically is less than 10 Ω. Such systems include those having multiple components. A greater resistance usually indicates that the metal path is not continuous, usually because of loose connections or corrosion.”

“Pressure-type clamps should have sufficient pressure to penetrate any protective coating, rust, or spilled material to ensure contact with the base metal with an interface resistance of less than 10 Ω.”

Section 13.4, “The establishment and monitoring of earthing systems” IEC 60079-32-1, Explosive atmospheres, Part 32-1: Electrostatic hazards, guidance.

Application Spotlight




Interlock stops operation

if the equipment connection or earth connection becomes faulty immediately halting the source of the static charge generation.

Attention grabbing LED indicators.

Simple and attention grabbing GO/NO-GO traffic light style LED Indicators show system status.

Complies with International Safety Standards

Complies with International Safety Standards by confirming safe, low resistance static dissipation path (10 Ohms or less) from equipment to designated earthing point.

Heavy Duty Stainless Steel Grounding Clamp

suits all common tankers, drums, conductive plant items.


Ingress Protection

IP 66 / NEMA 4X, 7 & 9.

Operating Temperature Range:

-13°F to +122°F - CSA
-40°C to +55°C - ATEX

Power Supply:

Selectable 110/120V or 220/240V AC, 50-60 Hz.
Selectable 12V or 24V DC

ATEX ApprovedIECEx Approved NEPSI Logo SIL 2 ApprovedcCSAus Logo