PTT: projects and investment
In 2012 PTT Exploration and Production took over Cove Energy, which held an 8.5% share in a large offshore natural gas field in Mozambique, extending PTT's offshore gas work abroad.
PTT · intrinsically safe
Intrinsically Safe Mobile Phone for PTT
PTT is Thailand's state-controlled national energy company, with the Ministry of Finance holding 51.1%. 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. This page explains what to look for in an intrinsically safe mobile phone for PTT, and where the IS-04Z1 stands against that list today.
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 topicintrinsically safe
DeviceMobile Phone
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.
Where things stand: the IS-04Z1 has not launched, and none of its four certification routes has produced a certificate yet. An operator's own vendor approval is a separate step. Certification status. Place facts reviewed October 2026.
At a glance · intrinsically safe
Checklist: intrinsically safe mobile phone for PTT
| Check | What to look for | IS-04Z1 today |
|---|---|---|
| Level of protection | ia, ib or ic matched to the zone | ib, for Zone 1 |
| Entity parameters | Uo, Io and Po within the device limits | Published with the certificate |
| Accessories | Chargers and cases certified with the device | Defined at certification |
| 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
Working with PTT Public Company Limited: sites and classified areas
The main sites and the hazardous-area types a portable device is likely to meet at this organisation.
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: 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: 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: industry on the ground
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.
The term · intrinsically safe
What “intrinsically safe” means for a smartphone
Intrinsic safety limits the electrical and thermal energy in a circuit so that neither a spark nor a hot surface can ignite a gas or dust atmosphere, even when a fault occurs. The ib level, used for Zone 1, tolerates one fault. It is the usual way to make a handheld device that a worker carries continuously through a hazardous area.
The IS-04Z1 is designed on this principle for Zone 1 and Zone 21 (marking target II 2 G Ex ib IIC T4). Intrinsic safety is a design basis, not a certificate: certification is in progress and none has been issued yet.
In PTT. Rounds at gas separation plants, receiving facilities and LPG terminals involve gauges, valves and checklists across large sites. A handheld designed for intrinsic safety could capture readings, photos and calls in classified spots if its certificate allows. Permit rules at Map Ta Phut in Rayong belong to PTT and its group companies.
The route · specification
Specifying an intrinsically safe mobile phone 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 intrinsically safe mobile phone for PTT cost?
SAMS has not published a price. Any figure you are offered for an uncertified Ex phone should be treated with caution; written indicative pricing is available for a defined quantity and site.
What does ‘intrinsically safe’ mean for the IS-04Z1?
The circuits are designed to limit energy so a spark or hot surface cannot ignite a gas or dust atmosphere, even with one fault (level ib, Zone 1). Certification of that design is in progress.
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
More on PTT, and on other places in Thailand.
Explosion-Proof Mobile Phone for PTTSame place, different guide
ATEX and IECEx Mobile Phone Supplier for PTTSame place, different guide
IECEx Mobile Phone for PTTSame place, different guide
Intrinsically Safe Mobile Phone Supplier 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?
Send the zone and gas group of your site and we will reply with the datasheet and schedule.