SMART-72 Grounding Clamp

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Ex Ib IIB T4 Gb

Certificate PRX SMART-72

Characteristics of the SMART-72 clamp

The PRX-SMART-72 intelligent grounding clamp is a clamp capable of monitoring the grounding circuit to which it is connected.

It indicates the status of the connection by means of indicator lights and an audible signal.

In order to significantly increase the safety of the grounding circuit, it must be possible to monitor the connection status of the elements connected to the grounding system.

Main Characteristics of the Smart-72 clamp

The grounding monitoring system is incorporated into the clamp as a single unit.

The clamp has two "fangs" hardened by heat treatment, which gives it great durability and also ensures an excellent connection on any type of surface.

No external power supply required. The clamp is powered by two AAA alkaline batteries which can be replaced by the user (one set of batteries lasts for more than 1 year).

The PRX SMART-72 model is entirely made of stainless steel, has insulated handles, and the area where the monitoring system is housed is made of plastic.

The monitoring system of the gripper is electronically and intrinsically protected, thus providing a high degree of operational safety in flammable or hazardous areas.

Its connection cable is spiral, resistant to abrasions, solvents and/or hydrocarbons. The swirl provides a retractable feature that makes it easy for your operator to use.

How the Smart Clamp Works

The PRX-SMART-72 clamp is capable of providing information on the status of the grounding in a simple and practical manner.

If an element is perfectly connected, the clamp will emit a green light confirming this condition.

If the connection of an element is deficient, the clamp will emit a red light and give an audible signal indicating that this connection is not adequate.

A connection is considered poor if the contact resistance between the metal ground to be grounded and the clamp is greater than 10Ω.

Thanks to the PRX-SMART-72 clamp, the connection status of the elements connected to the earthing system can be monitored regularly, significantly increasing safety.

Correct connection

Green Indicator

Poor Connection

Red Indicator
Smart-72 Grounding Clamp


Model PRX SMART-72

  • Gripper length: 9.8 in
  • Gripper width: 1.4 in
  • Total cable length: 3.3 ft
  • Batteries: 2 x AAA alkaline
  • Light indicators: Built-in green and red LEDs
  • Sound indicator: Buzzer

Are you a lightning protection installer?

Manufacturing, distribution, supply and delivery for installers and associated professionals.


No maintenance required

* PRX PAT-7: its electronics are capable of withstanding the stresses generated by lightning without deterioration or breakage of its components.

* The PRX SMART-72 does not require any specific maintenance. It will only require battery changes that can be performed by a qualified user.


You are fully protected by our 100% Satisfaction-Guarantee.

The PRX SMART-72 and PRX PAT-7 have a 2 year warranty.

Important: Our warranty covers manufacturing defects under proper use and installation conditions, according to the instructions provided. The warranty does not apply to damages resulting from improper installation, misuse, or alterations. It is important to carefully follow our installation guides to ensure optimal performance and warranty eligibility of our products.

You are fully protected by our 100% Satisfaction-Warranty.

What Our Clients Say

Dario Vera | Safety & Environmental Management Southern Cone | BAYER S.A.

In the 15 years that I have been working in Safety and Hygiene, PROINEX has been the only company from which I have received professional advice with solid technical foundations regarding installations against atmospheric discharges.

Marcos Estrella | HSEQ Coordinator | Wintershall Dea Argentina S.A.

Very good experience, excellent service, very good responsiveness and according to WDAR HSE standards. I recommend PROINEX because of the technology it has and the capacity to respond to high HSE standards.

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