InfraLensInfraLens
IS CodesIRCToolsSORHandbookQA/QCPMCFormatsCPHEEOMapsProjectsDCRRulesAbout Join Channel
Join
IS CodesIRCToolsSORHandbookQA/QCPMCFormatsCPHEEOMapsProjectsDCRDesign RulesBIMAbout Join WhatsApp Channel
InfraLensInfraLens
IS CodesIRCToolsSORHandbookQA/QCPMCFormatsCPHEEOMapsProjectsDCRRulesAbout Join Channel
Join
IS CodesIRCToolsSORHandbookQA/QCPMCFormatsCPHEEOMapsProjectsDCRDesign RulesBIMAbout Join WhatsApp Channel

IS 2175 : 1988Specification for heat-sensitive fire detectors for use in an automatic fire alarm system

PDFGoogleCompareBIS Portal
Link points to Internet Archive / others. Not hosted by InfraLens. Details
EN 54-5 · UL 521 · ISO 7240-5
CurrentSpecializedSpecificationBIMFire Safety · Fire Fighting
PDFGoogleCompareBIS Portal
Link points to Internet Archive / others. Not hosted by InfraLens. Details
OverviewValues4InternationalTablesFAQ3Related

IS 2175:1988 is the Indian Standard (BIS) for heat-sensitive fire detectors for use in an automatic fire alarm system. This standard specifies the constructional, operational, and performance testing requirements for heat-sensitive fire detectors (both fixed-temperature and rate-of-rise types) intended for use in automatic fire detection and alarm systems.

Specification for heat-sensitive fire detectors for use in an automatic fire alarm system

Overview

Status
Current
Usage level
Specialized
Domain
Fire Safety — Fire Fighting
Type
Specification
International equivalents
EN 54-5:2017+A1:2018 · CEN - European Committee for Standardization, EuropeUL 521:2021 · Underwriters Laboratories, USAISO 7240-5:2017 · ISO - International Organization for Standardization, InternationalBS 5839-1:2017 · BSI - British Standards Institution, UK
Typically used with
IS 2189IS 9000IS 11360
Also on InfraLens for IS 2175
4Key values2Tables3FAQs

BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.

Practical Notes
! Heat detectors should be utilized in environments where smoke detectors are likely to cause false alarms, such as commercial kitchens, boiler rooms, and highly dusty areas.
! This code focuses on the manufacturing and testing of the detector unit itself. For guidelines on spacing, zoning, and installation, engineers must refer to IS 2189.
Frequently referenced clauses
Cl. 4Classification of DetectorsCl. 5General Constructional RequirementsCl. 8Performance RequirementsCl. 10Tests (including response time, vibration, and corrosion)
Pulled from IS 2175:1988. Browse the full clause & table index below in Tables & Referenced Sections.
electronic componentsplasticsmetalsbimetallic stripsthermistors

International Equivalents

Similar International Standards
EN 54-5:2017+A1:2018CEN - European Committee for Standardization, Europe
MediumCurrent
Fire detection and fire alarm systems - Part 5: Heat detectors - Point heat detectors
Covers requirements, test methods, and performance criteria for point-type heat detectors.
UL 521:2021Underwriters Laboratories, USA
MediumCurrent
Standard for Heat Detectors for Fire Protective Signaling Systems
Specifies requirements for construction and performance of heat detectors for fire alarm systems.
ISO 7240-5:2017ISO - International Organization for Standardization, International
MediumCurrent
Fire detection and alarm systems - Part 5: Point-type heat detectors
Provides international requirements for point-type heat detectors for use in fire detection systems.
BS 5839-1:2017BSI - British Standards Institution, UK
LowCurrent
Fire detection and fire alarm systems for buildings - Part 1: Code of practice for design, installation, commissioning and maintenance of systems in non-domestic premises
This is a code of practice for system design and installation, which references product standards like EN 54-5.
Key Differences
≠IS 2175:1988 uses a simple 3-grade classification for fixed temperature detectors, whereas modern standards like EN 54-5 use a more complex multi-class system (e.g., A1, A2, B, C...) which also specifies application temperature ranges.
≠The test methodologies in IS 2175 are dated. For example, it specifies a water bath for static temperature tests, while EN 54-5 and UL 521 mandate more realistic tests in precisely controlled heat tunnels with flowing air.
≠Modern standards include extensive requirements for Electromagnetic Compatibility (EMC), which are completely absent in IS 2175:1988, making it unsuitable for modern electronic environments.
≠IS 2175 does not address software or algorithmic processing, as it predates the common use of microprocessors in detectors. EN 54-5 has provisions for assessing the reliability and performance of software-driven devices.
≠The rate-of-rise test in IS 2175 is a basic 'plunge test'. In contrast, ISO 7240-5 and EN 54-5 use dynamic tests with precisely controlled linear rates of temperature increase (e.g., 10 K/min, 30 K/min) to verify performance.
Key Similarities
≈All standards cover the same fundamental operating principles: detecting a fire by either reaching a fixed-temperature threshold or sensing a rapid rate of temperature rise.
≈Both the IS code and its international counterparts specify requirements for the two main functional types: Fixed Temperature detectors and Rate-of-Rise detectors (often as a combined unit).
≈All standards mandate that the detector be clearly marked with essential information, such as the manufacturer's name, model number, and temperature rating or class.
≈The basic concept of a high-temperature durability test (ensuring the detector can withstand temperatures above its alarm point without damage) is present in both IS 2175 (as an 'Oven Test') and modern standards, though the methodology differs.
Parameter Comparison
ParameterIS ValueInternationalSource
Fixed Temperature ClassificationGrade 1 (58-62°C), Grade 2 (68-72°C), Grade 3 (88-92°C)Class A1 (54-65°C), Class B (69-85°C), Class C (84-100°C), etc. Includes static response and application temperatures.EN 54-5:2017
Static Response Temperature Test MethodImmersion in a water bath with temperature rise of approx. 1°C per minute.Placement in a heat tunnel with air temperature rising at a controlled rate (e.g., 1 K/min, 3 K/min, 5 K/min).EN 54-5:2017
Vibration Test (Sinusoidal)10-150 Hz, 1 mm amplitude or 1 g acceleration, for 30 minutes per axis.10-150 Hz sweep, 0.5 gn peak acceleration. More complex profile based on EN 60068-2-6.EN 54-5:2017
Rate-of-Rise Response TestPlunge test: Transfer from 27°C to an oven at 100°C (Grade 1); must respond in 30-90 seconds.Dynamic test: Subjected to linear temperature ramps (e.g., 10, 20, 30 K/min) in a heat tunnel; must respond within specified time/temperature windows.ISO 7240-5:2017
Maximum Application TemperatureNot explicitly defined; implied by a 20°C differential below the nominal response temperature.Explicitly defined for each class. E.g., for Class A1 (min. response 54°C), the maximum application temperature is 50°C.EN 54-5:2017
Insulation Resistance TestNot less than 20 MΩ at 500 V DC.Not explicitly defined in the same way; electrical safety is covered by EN 60065 or equivalent, and EMC tests ensure functional integrity.EN 54-5:2017
⚠ Verify details from original standards before use

Key Values4

Quick Reference Values
typical fixed temperature threshold58°C to 78°C
rate of rise activation threshold8°C to 15°C per minute
vibration test frequency range10 Hz to 150 Hz
dry heat test temperatureMaximum application temperature + 5°C

Tables & Referenced Sections

Key Tables
Table 1 - Limits of Response Time for Rate-of-Rise Detectors
Table 2 - Limits of Response Time for Fixed Temperature Detectors
Key Clauses
Clause 4 - Classification of Detectors
Clause 5 - General Constructional Requirements
Clause 8 - Performance Requirements
Clause 10 - Tests (including response time, vibration, and corrosion)

Related Resources on InfraLens

Cross-Referenced Codes
IS 2189:1999Code of Practice for Selection, Installation ...
→
IS 9000:2018Mini Cement Plants — Specification
→
IS 11360:1985Reciprocating Compressors for Refrigerants - ...
→

Frequently Asked Questions3

What is the primary difference between the two types of heat detectors covered?+
Fixed-temperature detectors alarm when the ambient temperature reaches a predefined threshold, while rate-of-rise detectors alarm when the temperature increases at an abnormally fast rate (e.g., more than 8°C per minute), regardless of the initial temperature.
Does this standard provide spacing rules for mounting detectors on a ceiling?+
No, IS 2175 is a product specification and testing standard. Spacing and layout design rules are provided in IS 2189.
Does this standard cover smoke detectors?+
No, this standard is strictly for heat-sensitive fire detectors. Smoke detectors are covered under IS 11360.

QA/QC Inspection Templates

📋
QA/QC templates coming soon for this code.
Browse all 300 templates →