PTT: people and language
In 2016 PTT reported 4,616 employees at the parent and 24,680 at its subsidiaries, which shows most operational staff and contractors sit within subsidiary companies.
PTT · explosion proof
Explosion-Proof Smartphone Supplier for PTT
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. 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 sets out how an explosion proof smartphone supply route to PTT will work for the IS-04Z1, and what is and is not available before launch.
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 topicexplosion proof
DeviceSmartphone
RouteSupply
WherePTT
Short answer. An explosion proof smartphone for PTT cannot be bought yet: the SAMS IS-04Z1 is pre-launch (certification in progress, no certificate issued), and the datasheet, certification schedule and safe-area evaluation units are available now.
Current position: certification in progress, nothing issued, launch targeted for Q4 2026. Operator approval runs on its own timeline. Certification status. Place facts reviewed October 2026.
At a glance · explosion proof
Checklist: explosion proof smartphone for PTT
| Check | What to look for | IS-04Z1 today |
|---|---|---|
| Protection concept | Flameproof (Ex d) or intrinsic safety (Ex i) | Intrinsic safety, level ib |
| Zone suitability | Zone 1 gas and Zone 21 dust | Design target for Zone 1 and 21 |
| Certificate | Number, issuing body and schedule of conditions | In progress; not issued |
| Where it applies | PTT: LPG terminals, Group refineries and petrochemical units, Gas separation plants | 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 and the IS-04Z1
Where it operates and the kinds of classified area a handset would meet there.
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: 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: 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.
The term · explosion proof
What “explosion proof” means for a smartphone
“Explosion proof” is the phrase most buyers use for equipment that may be taken into a classified hazardous area. Strictly, it covers several protection concepts: a flameproof enclosure (Ex d) contains an internal explosion, while intrinsic safety (Ex i) limits electrical energy so that an ignition cannot start. Phones are normally intrinsically safe, because a flameproof handset would be too heavy to carry all shift.
The IS-04Z1 uses intrinsic safety, with a marking target of Ex ib IIC T4, and is designed for Zone 1 and Zone 21. It is pre-launch, certification is in progress and no certificate has been issued.
In PTT. Gas separation, LPG terminals and petrochemical units show how explosion-proof covers different concepts. Flameproof Ex d is for fixed equipment, while intrinsic safety suits handhelds. A phone relies on the second, and the target marking is II 2 G Ex ib IIC T4, subject to certification.
The route · supply
Sourcing the IS-04Z1 for PTT
Supply of the IS-04Z1 to PTT starts only after certification, through authorised distributors. Until then a buyer can request the datasheet and the written certification schedule, and arrange a safe-area evaluation unit, which puts the site on the list for the right local channel at launch.
- 01
Request the datasheet
The technical specification, marking target and conditions of use, sent by email.
- 02
Ask for the certification schedule
Which certificates are in progress, in what order, and what is still to be confirmed.
- 03
Evaluate in a safe area
Evaluation units can be used for connectivity, MDM enrolment and workflow testing outside classified areas.
- 04
Register for launch
Tell us the site, zone, gas group and quantity so the right authorised distributor can contact you.
Questions · PTT
Frequently asked questions
Can PTT buy the IS-04Z1 today?
No. Nothing can be bought or taken into a classified area today: certification is in progress and launch is planned for Q4 2026. What is available now is the datasheet, the written certification schedule and evaluation units for safe-area use.
What does an explosion proof 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.
Is the IS-04Z1 explosion proof or intrinsically safe?
It is intrinsically safe (marking target Ex ib IIC T4), which is the usual way to make a phone for hazardous areas. It is not a flameproof (Ex d) design, and certification is still 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.
How will SAMS supply PTT?
Through authorised distributors once certificates exist. Until then SAMS can send the datasheet and certification schedule and arrange safe-area evaluation units.
What language is expected for training and documents in Thailand?
Thai is the working language for site staff, while English is commonly used in engineering and international projects. Manuals and training for hazardous-area devices are therefore often expected in Thai and English. Confirm the required languages with the relevant PTT group company.
How does Thailand's tropical climate affect phones in the field?
Gulf of Thailand and Rayong-area sites are hot and humid with heavy monsoon rain and salty air, which stresses seals, connectors and batteries. Look for high ingress protection, corrosion resistance and a suitable temperature rating, and ask the site about its own environmental limits.
Would the phone cope with humid monsoon conditions at Map Ta Phut?
The IS-04Z1 is IP68 rated against dust and water, which helps with rain and humidity. Temperature and humidity limits will be set by the final certificate and datasheet, so check them. IP68 is not explosion protection. Certification is in progress and nothing has been issued.
Related guides
Keep exploring
More on PTT, and on other places in Thailand.
IECEx Mobile Phone Supplier for PTTSame place, different guide
ATEX and IECEx Mobile Phone Supplier for PTTSame place, different guide
Intrinsically Safe Mobile Phone for PTTSame place, different guide
Explosion-Proof 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
Tell us what you need to equip and where. The SAMS team answers by email with the datasheet and where each certification route stands.
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.