ULC CAN/ULC 588:2024A Gas and Vapour Detectors and Sensors, Including Accessories

PREFACE

This is the First Edition of CAN/ULC 588, Standard for Gas and Vapour Detectors and Sensors, Including Accessories.

This Edition of the Standard has been formally approved by the ULC Standards Committee on Smoke and Heat Detectors and Alarms.

This Standard has been developed in compliance with the requirements of SCC for accreditation of a Standards Development Organization.

Only metric SI units of measurement are used in this Standard. If a value for measurement is followed by a value in other units in parentheses, the second value may be approximate. The first stated value is the requirement.

Appendices A, B and C, identified as Informative, are for informational purposes only.

In Canada, there are two official languages, English and French. All safety warnings must be in French and English. Attention is drawn to the fact that some Canadian authorities may require markings and/or installation instructions to be in both official languages.

Attention is drawn to the possibility that some of the elements of this Canadian standard may be the subject of patents rights. ULC Standards shall not be held responsible for identifying any or all such patents rights.

Requests for interpretation of this Standard should be sent to ULC Standards. The requests should be worded in such a manner as to permit a “yes” or “no” answer based on the literal text of the requirement concerned.

This CAN/ULC 588 Standard is under continuous maintenance, whereby each revision is approved in compliance with the requirements of SCC for accreditation of a Standards Development Organization. In the event that no revisions are issued for a period of four years from the date of publication, action to revise, reaffirm, or withdraw the standard shall be initiated.

Comments or proposals for revisions on any part of the Standard may be submitted at any time. Proposals should be submitted via a Proposal Request in the Collaborative Standards Development System (CSDS) at https://csds.ul.com.

This Standard is intended to be used for conformity assessment.

The author thanks the International Electrotechnical Commission (IEC) for permission to reproduce information from its International Standard IEC 60079-29-1 ed.1.0 (2007).

All such extracts are copyright of IEC, Geneva, Switzerland. All rights reserved. Further information on the IEC is available from www.iec.ch. IEC has no responsibility for the placement and context in which the extracts and contents are reproduced by the author, nor is IEC in any way responsible for the other content or accuracy therein.

SCOPE

1.1 This Standard covers requirements for permanently installed, portable and transportable toxic and combustible gas and vapour detectors and sensors, including accessories, intended to be employed in indoor locations or outdoor locations/unconditioned locations in accordance with manufacturer’s recommendations.

1.2 A detector and/or sensor, as covered by these requirements, consists of an assembly of electrical components coupled with a sensing means inside a chamber, or by separate components to detect toxic and/or combustible gases or vapours. The detector includes provision for the connection to a source of power and signaling circuits and optional remote control circuits. Additional functionality, such as a heat detector, heat sensor, smoke detector, smoke sensor, or audible signaling appliance/device, is permitted to be incorporated as part of the toxic combustible gas and vapour detector assembly and are to be evaluated to the applicable standard(s).

1.3  This Standard covers the following types of detectors and sensors:

A Those intended for monitoring the environment, areas inside ventilation ductwork, and detectors and sensors intended for open area protection which are connected to a compatible power supply or control unit for operation as part of gas detection or emergency signaling systems;

B Those intended solely for control of ventilation or shut off devices such as fans or control valves;

C Those intended for both of the above applications;

D Sensors and sensing circuits intended for use with or in gas detectors or gas detection circuits within fuel cell systems;

E Portable detectors and sensors;

F Transportable detectors and sensors;

G Multi-gas gas and vapour detectors; and

H Multi-gas gas and vapour sensors.

1.4 This Standard also covers all remote accessories that are intended to be connected to a gas or vapour detector and/or sensor.

1.5  This standard does not cover the following:

A Control units to which the detectors are intended to be connected that are covered by CAN/ULC-S527, Standard for Control Units for Fire Alarm Systems; and CAN/ULC-S545, Standard for Residential Fire Warning System Control Units;

B Self-contained single and multiple station carbon monoxide alarms that are covered by the Standard for Residential CO Alarming Devices, CAN/CSA 6.19;

C Automatic flammable vapour sensor systems and components covered by the Standard for Automatic Flammable Vapor Sensor Systems and Components, or CSA C22.2 No. 60079-29-1, Explosive atmospheres — Part 29-1: Gas detectors – Performance requirements of detectors for flammable gases;

D A sensor used solely as part of a multi-criteria smoke detector, covered by CAN/ULC-S529, Standard for Smoke Detectors for Fire Alarm Systems;

E A heat detector or sensor incorporated as a part of a carbon monoxide detector assembly, and covered by CAN/ULC-S530, Standard For Heat Actuated Fire Detectors for Fire Alarm Systems; and

F Devices that are part of a manufacturing process interface or control.