PTT: background
PTT was established on 29 December 1978 as the Petroleum Authority of Thailand, and was corporatised and re-registered as PTT Public Company Limited on 1 October 2001, listing on the Stock Exchange of Thailand that December.
PTT · IECEx
IECEx Smartphone for PTT
PTT opened the Bangchak oil refinery in Bangkok in 1985 and built a nationwide network of fuel distribution outlets, adding refinery and retail forecourt areas to its estate. It runs submarine gas pipelines in the Gulf of Thailand and the gas separation plants at Map Ta Phut, and controls group companies in exploration, petrochemicals and refining. If you are specifying an IECEx smartphone for PTT, this page covers the markings, the approvals and the current certification status of the IS-04Z1.
Pre-launch · certification in progress · Launching Q4 2026
Marking targetEx ib IIC T4Intrinsic safety, Zone 1 / 21 design target · certification in progress
AvailabilityQ4 2026via authorised distributors
Search topicIECEx
DeviceSmartphone
RouteSpecification
WherePTT
Short answer. The SAMS IS-04Z1 is the intrinsically safe smartphone covered here for PTT: pre-launch, designed for Zone 1 and Zone 21 (marking target Ex ib IIC T4), with certification in progress and no certificate issued.
Status: pre-launch. IECEx, ATEX, UKEX and NEC 500 certification is in progress and no certificate has been issued; launch is planned for Q4 2026. A buyer's engineering review is separate from the certificate. Certification status. Place facts reviewed October 2026.
At a glance · IECEx
Checklist: IECEx smartphone for PTT
| Check | What to look for | IS-04Z1 today |
|---|---|---|
| Certificate of conformity | Number checkable on the IECEx online register | In progress; not issued |
| Standards edition | The IEC 60079 edition the certificate cites | Stated on the certificate when issued |
| Schedule of conditions | Limits of use, batteries and accessories | Published with the certificate |
| Where it applies | PTT: Gas separation plants, Gas pipelines and receiving facilities, LPG terminals | Classified by the site operator |
Product · Thailand
The product behind this search: the SAMS IS-04Z1.
SAMS IS-04Z1
An intrinsically safe Android smartphone designed for Zone 1 and Zone 21 hazardous areas in Thailand. It is pre-launch: IECEx, ATEX and NEC 500 certification is in progress ahead of the Q4 2026 launch.
- IP68 sealed
- 4,000 mAh battery
- 50 MP camera
- Android 16
- Zone 1 / Zone 21 design target
The organisation · PTT
PTT Public Company Limited: operations and where an Ex phone fits
A short profile of its operations and the kinds of classified area that matter for portable equipment.
Sites and areas
- Map Ta Phut, Rayong
- Gulf of Thailand gas pipelines
Classified areas
- Gas separation plants
- Gas pipelines and receiving facilities
- LPG terminals
- Group refineries and petrochemical units
Supplier approval · PTT
How suppliers reach PTT
Supplier registration and equipment approval are run by the organisation itself; confirm current requirements with its procurement and HSE teams. The Ex certificate and an organisation's own vendor or engineering approval are two separate timelines; SAMS is working towards both and holds neither today.
Field notes · PTT
More about PTT that matters for portable equipment
PTT: geography and layout
The headquarters is on Vibhavadi Rangsit Road in Chatuchak, Bangkok, while its key assets are offshore in the Gulf of Thailand and at industrial sites, so site contacts are separate from head office.
PTT: who works there
Affiliated companies include PTT Exploration and Production, PTT Global Chemical and PTT Green Energy, so upstream, petrochemical and power sites each have their own operating teams and procurement.
PTT: infrastructure
PTT owns extensive submarine gas pipelines in the Gulf of Thailand and a network of LPG terminals across the country, so offshore pipelines and LPG storage sites are key hazardous-area locations.
The term · IECEx
What “IECEx” means for a smartphone
IECEx is the international scheme for certifying equipment used in explosive atmospheres. A certificate of conformity is issued by an accredited certification body against a specific edition of the IEC 60079 standards and carries a schedule of conditions of safe use. It is not a legal requirement in most countries on its own, but many national schemes accept it as the technical basis.
The IECEx certificate for the IS-04Z1 is in progress and has not been issued. The marking target is Ex ib IIC T4, the intrinsic safety concept for Zone 1 gas with the hardest gas group (IIC) and a 135 °C temperature class.
In PTT. At Map Ta Phut, international EPCs and licensors work alongside PTT group companies, and many are familiar with IECEx. A reviewer should read the certificate of conformity with its schedule of conditions. The IS-04Z1 is designed for IECEx, and certification is in progress.
The route · specification
Specifying an IECEx smartphone for PTT
A short checklist for anyone writing or reviewing the specification, with the IS-04Z1 status against each point.
Check on the paper
- Marking
- Equipment group, category, protection concept, gas group and temperature class, matched to the area drawing.
- Certificate and schedule
- A certificate number, issuing body and the schedule of conditions, not a brochure claim.
- Standards edition
- The IEC 60079 or national standard edition the certificate was issued against.
Check for the IS-04Z1
- Marking target
- II 2 G Ex ib IIC T4: a target, not yet a certificate.
- Certificate status
- IECEx, ATEX, UKEX and NEC 500 in progress; none issued.
- Operator approval
- Separate from the certificate and handled with the site operator.
Questions · PTT
Frequently asked questions
Can PTT buy the IS-04Z1 today?
Not today. Until the certificates are issued the IS-04Z1 stays out of classified areas, and until launch there is nothing to purchase. You can ask for the datasheet and the certification schedule, or book a safe-area evaluation unit.
What does an IECEx smartphone for PTT cost?
There is no list price yet. SAMS gives indicative pre-launch pricing in writing, against a stated quantity and site, and does not commit to a lead time before certification completes.
Does the IS-04Z1 hold an IECEx certificate?
No. The IECEx certificate is in progress and has not been issued. SAMS will publish the number when it exists.
How does PTT approve suppliers?
Supplier registration and equipment approval are run by the organisation itself; confirm current requirements with its procurement and HSE teams.
Is intrinsically safe the same as explosion proof?
Not exactly. Explosion proof is a broad everyday term; intrinsic safety is one protection concept, which limits energy so ignition cannot occur. Flameproof (Ex d) is a different concept that contains an explosion. The IS-04Z1 is intrinsically safe by design.
Which PTT group sites typically need intrinsically safe handhelds?
Typical sites include offshore production platforms and gas receiving terminals, LPG terminals, refineries, petrochemical complexes and fuel stations. Zoning is facility-specific, so ask the operating subsidiary's HSE team for area classification drawings and its portable-electronics rules before specifying devices.
Is PTT or a subsidiary the right buyer for Ex equipment?
Because most employees and operations sit in subsidiaries such as PTT Exploration and Production or PTT Global Chemical, each often runs its own procurement and HSE approval. Identify the operating company for the site and confirm its supplier registration and certification requirements.
Does approval at PTT cover its group companies?
Not necessarily. The sheet notes that refining and petrochemicals are run by group companies, not PTT itself, and that supplier registration and equipment approval are run by the organisation. Confirm which entity applies with its procurement and HSE teams. The IS-04Z1 has no certificate yet.
Related guides
Keep exploring
Other guides for PTT, other places in Thailand, and the pages behind them.
ATEX and IECEx Mobile Phone Supplier for PTTSame place, different guide
Explosion-Proof Mobile Phone for PTTSame place, different guide
Intrinsically Safe Mobile Phone Supplier for PTTSame place, different guide
IECEx Mobile Phone for PTTSame place, different guide
Thailand market guideCertification route and regulators
All guides for ThailandEvery route we cover
Certification statusWhat is in progress
Enquiry · PTT
Ask about the IS-04Z1 for PTT, Thailand
Send the site, zone and gas group and roughly how many handsets. We reply by email with the datasheet and the certification schedule.
Enquiry · PTT
Launching Q4 2026
Planning for PTT?
Tell us the zone, gas group and operator. We will send the datasheet and the certification schedule.