Rheonics provides advanced process control equipment certified by UL for use in specified hazardous locations (HazLoc) across the United States and Canada.
The certification covers designated Rheonics models for Class I, Division 1; Class II, Division 1; and Class III hazardous locations.
Measurement Technology for Demanding Hazardous Environments (HazLoc)
Reliable process measurement requires more than measurement performance alone. When working in volatile environments, safety is paramount, and the industrial equipment must also meet the safety requirements applicable to the environments where it is installed and operated, particularly in areas where flammable gases, vapors, combustible dusts, or fibers may be present.
Rheonics has achieved UL HazLoc certification for specified process control equipment intended for use in hazardous (classified) locations. This milestone reinforces our commitment to providing industrial operators across the United States and Canada with sensor solutions that meet the rigorous Class/Division and Zone-based safety requirements demanded by oil & gas, chemical processing, and other environments where explosion protection is critical.

This certification provides customers, system integrators, and engineering teams with independently evaluated equipment for use within the scope of the applicable certification requirements. Additionally, it includes separate coverage for the United States and Canada:
|
Item |
Definition |
|
|---|---|---|
|
Country |
United States |
Canada |
|
Equipment Coverage |
QUZW – Process Control Equipment for Use in Hazardous Locations |
QUZW7 – Process Control Equipment for Use in Hazardous Locations Certified for Canada |
|
Type Identification |
SRV, SRD, DVM, DVP, BTC, BTS, and DVI |
|
|
Class/Division |
Class I, Division 1, Group A, B, C, and D Class II, Division 1, Group E, F, and G Class III |
|
|
Temperature Class |
T6/T5/T4/T3/T2/T1 |
|
|
Applicable standards |
UL 913, Edition 8, Issue Date 2013-12-06, Revision Date 2022-05 10 |
CSA C22.2 NO. 60079-0, Edition 4, Issue Date: 2019-02-01 CSA C22.2 NO. 60079-11, Edition 2, Issue Date: 2014-02-01 |
|
Report Number |
E551072-20260703 |
E551072-20260703 |
|
Certificate Number |
UL-US-26113715-0 |
UL-CA-2683522-0 |
|
Issue date |
2026-07-06 |
2026-07-06 |
All listed models must be installed in accordance with the applicable certification requirements. For more information, consult the sensor manual included with each Rheonics sensor.

Download the Official Certificate of Compliance
Access the official UL Certificate of Compliance covering the listed Rheonics hazardous-location models.

Rheonics sensors have undergone rigorous testing to ensure they can operate safely in explosive environments.
The UL HazLoc certification ensures that Rheonics sensors comply with specific safety standards and regulations set forth by United States and Canadian authorities to mitigate the risk of explosions in environments where flammable gases, vapors, or dust are present. Some of the related industries are:
-
Oil and gas
-
Chemical processing
-
Petrochemical production
-
Paints and coatings
-
Energy and fuels
-
Process manufacturing
Final equipment selection and installation must follow the applicable certification requirements, equipment markings, and installation documentation.
| Description | Link |
|---|---|
| UL HazLoc Certified Rheonics Process Control Equipment for Hazardous Locations | Download UL HazLoc Certificate of Compliance |
Part of the Rheonics Ex Certification Portfolio
The UL HazLoc certification forms part of the broader Rheonics certification offering for equipment intended for hazardous and explosive environments.
Customers evaluating hazardous-area installations can also review relevant Rheonics certification and technical resources, including:
-
ATEX certification
-
IECEx certification
-
Regionals Ex Certification (e.g. JPEx, KCs, etc)
-
Ex sensor documentation
-
Installation and support resources for hazardous environments
Specific equivalence or cross-certification claims between UL HazLoc, ATEX, IECEx, Division, and Zone systems should only be added after technical validation.
Talk to a Rheonics Expert
Selecting equipment for a hazardous location requires consideration of the certified model, installation environment, process conditions, and applicable classification requirements.
Contact Rheonics to discuss your application and integration requirements.
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