| Issuing ExTL | ExTR Ref. Number | Manufacturer | Standards covered | |
| 256 | BAS - Baseefa |  |
| 31 | BAS - SGS Baseefa Limited |  |
1 | | GB/BAS/ExTR12.0328/00 | Scully Signal Company 70 Indus... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0325/00 | Rosemount Analytical 2400 Barr... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0322/01 | Rosemount Incorporated 8200 Ma... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0322/00 | Rosemount Incorporated 8200 Ma... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0321/00 | Victor Lighting 388 Hillington... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0319/00 | ifm electronic GmbH ifm-Strass... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0316/00 | Crowcon Detection Instruments ... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0315/00 | Crowcon Detection Instruments ... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0313/00 | Hawke International A Division... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0311/00 | Gilbarco Veeder Root India Pri... | IEC 60079-0 (Ed.5) +... |  |
1 | | GB/BAS/ExTR12.0310/00 | Kistler Instrument Corp 75 Joh... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0309/00 | Xtralis (Switzerland) Burgerri... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0298/00 | Bifold Fluidpower Limited Gree... | IEC 60079-0 (Ed.5) +... |  |
1 | | GB/BAS/ExTR12.0295/00 | Rosemount Incorporated 8200 Ma... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0294/00 | Rosemount Incorporated 8200 Ma... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0293/00 | Rosemount Incorporated 8200 Ma... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0287/00 | Resistance Technology Limited ... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0276/00 | STI srl Via G.Pascoli 10a-b 24... | IEC 60079-0 (Ed.4.0) +... |  |
1 | | GB/BAS/ExTR12.0272/00 | Ion Science Limited The Way Fo... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0270/00 | Scully Signal Company 70 Indus... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0264/00 | Tracerco PO Box 1 Belasis Hall... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0262/00 | Honeywell Analytics Limited H... | IEC 60079-0 (Ed.4.0) +... |  |
1 | | GB/BAS/ExTR12.0261/00 | Honeywell Analytics Limited H... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0260/00 | Honeywell Analytics Limited H... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0208/00 | UNI-RAM Corporation 381 Bentle... | IEC 60079-0 (Ed.5) +... |  |
1 | | GB/BAS/ExTR12.0207/00 | UNI-RAM Corporation 381 Bentle... | IEC 60079-0 (Ed.4.0) +... |  |
1 | | GB/BAS/ExTR12.0202/01 | Kistler Instrument Corp. Amher... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0171/00 | Ion Science Limited The Way Fo... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR12.0154/00 | Toshiba Mitsubishi - Electric ... | IEC 60079-0 (Ed.5) +... |  |
1 | | GB/BAS/ExTR12.0072/00 | Davis Derby Limited Chequers L... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/BAS/ExTR11.0113/00 | UNI-RAM Corporation 381 Bentle... | IEC 60079-0 (Ed.5) +... |  |
| 6 | BKI - Testing Station for Explosion Proof Equipment |  |
| 202 | BVS - DEKRA EXAM GmbH |  |
| 3 | CCVE - NANIO "CCVE" |  |
| 35 | CES - CESI |  |
| 18 | CQST - China National Quality Supervision and Test |  |
| 50 | CSA - CSA International |  |
| 161 | DEK - DEKRA Certification B.V. |  |
| 21 | DNV - DNV |  |
| 52 | EPS - Bureau Veritas Consumer Products Services Germany GmbH |  |
| 15 | ETL - Intertek |  |
| 107 | FMG - FM Approvals LLC |  |
| 31 | FTZU - Fyzikalne technicky zkusebni ustav |  |
| 44 | IBE - IBExU Institut für Sicherheitstechnik GmbH |  |
| 67 | INE - INERIS |  |
| 26 | ITA - TUV Rheinland Australia Pty. Ltd |  |
| 63 | ITS - Intertek Testing & Certification Limited |  |
| 8 | KDB - Central Mining Institute Experimental Mine "Barbara" |  |
| 9 | KDB - Główny Instytut Górnictwa, Kopalnia Doświadczalna „BARBARA” |  |
| 27 | KEM - DEKRA Certification B.V. |  |
| 35 | KGS - Korea Gas Safety Corporation |  |
| 3 | KOS - Korea Occupational Safety and Health Agency (KOSHA) |  |
| 15 | KTL - Korea Testing Laboratory |  |
| 68 | LCI - Laboratoire Central des Industries Electriques (LCIE) |  |
| 32 | LCIE - Laboratoire Central des Industries Electriques (LCIE) |  |
| 2 | MST - Mine Safety Technology Centre (MSTC), |  |
| 27 | NEM - NEMKO |  |
| 21 | NEPSI - National Supervision and Inspection Centre for |  |
| 32 | PCEC - Supervision & test Centre of Ex-products of |  |
| 138 | PTB - Physikalisch-Technische Bundesanstalt (PTB) |  |
| 6 | QPS - QPS |  |
| 14 | SEV - Electrosuisse div. Testing and Certification |  |
| 14 | SIM - Safety in Mines Testing and Research Station (Simtars) |  |
| 1 | SIQ - Slovenian Institute of Quality and Metrology (SIQ) |  |
| 348 | SIR - SIRA Certification Service |  |
| 3 | SP - SP Technical Research Institute of Sweden |  |
| 1 | TPS - TÜV SÜD Product Service GmbH |  |
| 1 | TRC - TRaC EMC & Safety Ltd |  |
| 35 | TRC - TRaC Global Ltd. |  |
| 50 | TSA - TestSafe Australia |  |
| 49 | TUN - TÜV NORD CERT GmbH |  |
| 24 | TUR - TUV Rheinland Industrie Service GmbH |  |
| 129 | UL - UL LLC |  |
| 1 | UL - Underwriters Laboratories Inc (UL) |  |
| 22 | ULD - UL International DEMKO A/S |  |
| 18 | VTT - VTT Expert Services Ltd. |  |
| 16 | ZLM - ZELM Explosionsschutz GmbH |  |
| 2337 | |  |