METTLER TOLEDO | Scale Indicator, Scale Controllers & Weight Indicator | Analog Weighing Scale
Scale Indicator

Weighing Indicators for Hazardous Areas

Safe, Reliable Performance in Potentially Explosive Environments

A weighing indicator for hazardous areas is specifically designed and certified to be intrinsically safe, meaning that it is constructed in a way that ensures that it cannot generate enough heat or electrical energy to cause ignition of any flammable substances in the surrounding environment. These indicators typically have special features such as explosion-proof enclosures, specialized wiring and connectors, and flame-retardant materials.

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All-in-One Basic Weighing Bundle

Customize your user experience to set your operators up for success and achieve flexibility for your future needs. IND930/970 indicators, with the all-in-one application bundle ProWorks v1.0, allow you to immediately speed up your operation and reduce errors without the time and expense of programming and operator training. 続きを読む

IND360 Compact Automation Indicator

Through ultra-fast processing connected to the world's most widely used PLCs, the IND360 helps to boost productivity and increase operational uptime in a broad range of automation applications. Use the condition monitoring and Smart5™ alarming to ensure your system is performing as expected and to react quickly if issues arise. 続きを読む

Form+ Recipe Management System

Form+ Recipe Management System

Form+ delivers complete recipe traceability, repeatable processing, and maximum productivity. Because the workflow is tailored to your specific process, your operators know exactly what to expect from the system. The result is short operator training times and systematically consistent and repeatable product quality in every batch. 続きを読む

Industry 4.0 and IIoT Connectivity

The ACI400 IIoT Edge Device is a gateway for the Industrial Internet of Things. It provides an OPC UA server and several MQTT clients for seamless exchange of non-time-critical data with well-established Cloud and ERP/MES systems, such as Azure, AWS (Amazon Web Services), IBM and SAP. Take your production to the next level. 続きを読む

InVision™ Smart Scale

InVision™ Smart Scale

Achieve easy handling and error-free operation in picking and packing applications with the smart algorithms of InVision™, which combines weighing with visual recognition and picture capture. The smart scale directly connects to production and ERP systems for full data visibility and visual proof of successful order fulfillment. 続きを読む

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FAQs - Indicators

When weighing in hazardous environments, safety is critical. METTLER TOLEDO hazardous-area weighing indicators, also known as weighing terminals for hazardous areas, work with a variety of scale types, helping to provide a complete weighing solution. Easily transfer data from the indicator to automation controllers and PC-based systems. METTLER TOLEDO offers hazardous-area indicators approved for explosive environments classified as Zone 1/21, Division 1, Zone 2/22 and Division 2.

What is a weighing terminal for hazardous areas? What is a weighing indicator for hazardous areas?

A hazardous-area scale indicator is a type of weighing instrument designed for use in environments where there is a risk of explosion or fire due to the presence of flammable gases, vapors, or dust. These environments are known as hazardous areas or potentially explosive atmospheres.

What industries use hazardous-area scale indicators?

Hazardous-area scale indicators are used in a variety of industries, including chemical, pharmaceutical, oil and gas, and food processing, where accurate weighing of materials is required in potentially hazardous environments. They are typically used in conjunction with weighing platforms, load cells, and other weighing components that are also certified for use in hazardous areas.

How do I know a weighing indicator is safe to use in my hazardous area?

To ensure that an intrinsically safe weighing indicator meets the appropriate safety standards, it must be certified by a recognized testing agency, such as Underwriters Laboratories (UL) or the International Electrotechnical Commission (IEC), for use in the specific hazardous environment where it will be used. The certification process involves rigorous testing to ensure that the instrument is safe to use and will not cause any explosions or fires in the hazardous area. Refer to the datasheet for your specific product to confirm it meets your production area’s requirements for hazardous-area safety.

Who certifies an intrinsically safe weighing indicator?

Some of the commonly recognized testing and certification organizations that can certify equipment weighing terminals for hazardous areas as intrinsically safe include:

  1. International Electrotechnical Commission (IEC): IEC is an international standards organization that develops and publishes standards for a variety of industries, including those related to electrical equipment used in hazardous locations.

  2. Underwriters Laboratories (UL): UL is a global safety certification company that is authorized to perform safety testing by the Occupational Safety and Health Administration in the United States. Nationally Recognized Testing Laboratories (NRTLs) evaluate products against the standards defined by OSHA to ensure compliance to the requirements and provide certification services for products and equipment that are used in hazardous locations, including intrinsically safe equipment. 

  3. ATEX Notified Bodies: In Europe, the ATEX (Atmosphere Explosibles) directives govern the use of equipment in hazardous areas. ATEX Notified Bodies are organizations that have been authorized by European Union member states to carry out conformity assessments for products and equipment intended for use in potentially explosive atmospheres. 

  4. Canadian Standards Association (CSA): CSA is a standards development organization that also offers testing and certification services for a wide range of products and equipment, including those used in hazardous areas, in accordance with the Canadian Electrical Code (CEC).

Certification by one of these organizations is essential to ensure that equipment is designed and tested to meet the appropriate safety standards for use in hazardous areas.