Current View | Tanker Fall Prevention

Tanker Fall Prevention

Current View | Bulk Liquid Transfer

Bulk Liquid Transfer

Loading Management

Scully Tanker Grounding

Scully Tanker Grounding Systems mitigate the high risk of static build-up caused by friction between liquid and materials when loading flammable liquids.

These systems are essential in industries such as petroleum, chemical manufacturing, and transportation, where the handling of volatile liquids poses a fire or explosion hazard due to static electricity.

Scully Tanker Grounding
Features and benefits

Scully design and manufacture products that are the industry standard for hazardous, as well as flammable liquid handling. Originally designed for the petroleum market, Scully’s range of tanker grounding equipment is suitable for all flammable liquid products, including fuels, chemicals and spirits.  In addition, here are some of the other features and benefits of the Scully ST–47C Groundhog Earthing System.

  • Provides non-permissive signal if proper earth is not present on a tanker. Operators can use this to control pumps and valves, allowing loading only when properly earthed.
  • It immediately shuts down the loading operation if proper static earthing is lost during the loading process.
  • Self-proving. therefore it continuously monitors the grounding condition throughout operation.
  • Users can employ it in conjunction with the Scully overfill monitoring system, therefore achieving complete tanker monitoring and loading control.
  • Clear red/green indicator lights provide visual proof of monitoring, as well as earth grounding.
  • SIL and ATEX approved for use in explosive atmospheres.
  • Operation temperature between -40° to + 60° C for extreme climate conditions.

Take a look at the
Scully Tanker Grounding System

Loading Management
Scully Tanker Grounding

Below you will find the key details of the Scully Tanker Grounding Systems we offer. If you would like to discuss this in more detail, then please just get in touch.  Because, we are always happy to help and answer any queries you may have.


  • The Groundhog is a self-proving earthing system, therefore providing maximum safety in loading operations.
  • The system consists of a rack mounted control housing with two connection methods.
  • It can operate in conjunction with your existing Scully Overfill Prevention System, as well as an independent unit.
  • Scully is widely recognised for its dependability, service, and safety.

Technical Specification

  • Operation Temperature: -40° to + 60° C (-40° to +140° F)
  • Enclosure: Explosion-Proof/ Weather-Proof IP65 suffix “E”
  • Indicators: Red- not earthed/non-permit. Green- earthed/permit.
  • Response Time: 0.5 seconds maximum.
  • Electrical Connections: Internal terminal strips, identified for easy installation.
  • Bypass Switch: Key lockable off-on bypass switch for ELK model only.
  • Output Control: One normally open user contact rated 250, 5A

Power Requirements

  • ST-47C-240 Models: 208-240 VAC, 50/60 Hz. 0.125 Amperes maximum.
  • ST-47C-120 Models: 105-125 VAC, 50/60 Hz. 0.250 Amperes maximum.


ATEX: Ex d [ia] IIB T5 Gb Consult factory for FM, CSA approved models.

Relevant industries

Suitable for the following sectors


Bulk Tank

& Inorganics

Case Study
The Scully Tanker Grounding Systems in action

See how we provided a full design, manufacture and installation solution incorporating our electronic bottom loading skid, a tank off-set fill point cabinet, an electronic tank gauge system for three tanks with remote web access and all the on site electrical and mechanical pipework to an oil distribution company.