A Zone 1 and Zone 21 handset for the people inside the Thai petrochemical cluster: shift operators on the Map Ta Phut crackers, reliability engineers at Sriracha, jetty and tank farm crews along the Rayong coast, and the safety and IT departments that rule on what passes a gate. It is pre-launch, so what a Thai buyer takes today is the specification and a place in the certification queue. Often searched for as an “explosion proof phone”, the IS-04Z1 uses intrinsic safety as its protection concept.
Launching Q4 2026 · certification under way with IECEx, TISI and the NBTC
IECEx · TIS
IECEx
ATEX 2014/34/EU
NEC 500 Class I Div 1IP68Zone 1 / Zone 21
Android 16
Qualcomm SnapdragonThailand keeps almost all of its heavy hazardous area work inside one corridor. Map Ta Phut in Rayong is the petrochemical centre of gravity, Sriracha in Chonburi holds the refining weight, and the Eastern Economic Corridor stretches the same belt across Rayong, Chonburi and Chachoengsao. The Gulf adds the offshore side.
Operators and contractors such as PTT Global Chemical, SCG Chemicals and IRPC need an explosion proof mobile phone they can carry into classified areas at Map Ta Phut Industrial Estate, Rayong industrial estates and Sriracha, Chonburi. The IS-04Z1 is designed for Zone 1 and Zone 21 duty there.
Everything below is design intent measured against what a Thai plant does to a handset. Marking and ambient range are fixed by certification, not by this page.
For evaluators in Thailand, the IS-04Z1 explosion proof mobile phone is designed around these points: Heat that never breaks, then the rainy season; Gas group IIC across the cluster; Polymer dust beside hydrocarbon vapour; A Thai reading workforce; Long shifts and gate discipline.
Rayong stays warm and humid all year and takes the southwest monsoon from May, so sealing must survive a downpour on an open pipe rack as often as a hot afternoon on a cracker structure. IP68 sealing and a rugged build are the design floor; the certificate ambient range is the compliance figure.
Hydrogen at the reformers and hydrotreaters, ethylene through the cracker network, acetylene in maintenance work — all inside the same estates. A handset rated only to IIB is unusable across much of Map Ta Phut, hence the Ex ib IIC target.
Polyethylene and polypropylene powder, catalyst loading and additive blending put Zone 21 dust into the same plant as Zone 1 vapour. One specification covers both, rather than issuing two devices.
Operators, technicians and contractor crews work in Thai; the drawings and procedures behind them are often English. Android 16 carries both on one hardware build, so a plant issues a single device, a single managed app list and a manual the crew actually reads.
Estate passes are issued for a shift, not a task, and leaving a classified area to charge means clearing a gate twice. The 4,000 mAh battery is sized for a full shift with the radio app, the 50 MP camera and four constellation GNSS running.
Thai hazardous area practice references the TIS standards administered by TISI, with factory safety enforced by the Department of Industrial Works, and the technical evidence underneath is an IECEx Certificate of Conformity. A handset separately needs NBTC type approval, and an estate under IEAT adds its own permit regime. All of it is in progress.
What a Thai plant engineer and a safety officer will ask to see is the certificate, the marking string and the schedule behind them, and the honest position is that none of them is issued yet. Thai practice references the TIS standards administered by the Thai Industrial Standards Institute under the Ministry of Industry, while factory operation and safety sit with the Department of Industrial Works. The technical evidence underneath is an IECEx Certificate of Conformity, since the Thai treatment of explosive atmospheres follows the international IEC 60079 series rather than a separate national protection concept. Where a plant stands inside an estate run by the Industrial Estate Authority of Thailand, the estate layers its own permit and contractor access regime over that — and at Map Ta Phut it is often the layer that really governs what a technician carries past a gate.
The second route is radio and import. A handset is radio equipment, so it needs type approval from the NBTC before it can be sold or put into service in Thailand, and that approval is filed against a legal entity in country rather than the manufacturer abroad. Hence the Thai partner: one entity to hold the approval, import the fleet and keep spares on the ground. Above both routes sits the operator. As in Malaysia and across the Gulf, two timelines run in parallel — national conformity, and the operator’s own engineering and telecoms review. The second is what decides whether a phone reaches the work front, and a PTT group or SCG package will review the device itself whatever the national file says.
Typical Zone 1 and Zone 21 duty for the IS-04Z1 explosion proof mobile phone in Thailand includes: Shutdown season inside Map Ta Phut; Operator rounds at Sriracha; Receiving terminal and gas separation work; Gauging and loading at the Rayong and Laem Chabang jetties.
Turnarounds across the estate overlap, and a contractor crew inside a classified area works on a pass with a fixed window. Permit app, plant directory and camera on one intrinsically safe handset cuts what is signed out at the gate and reconciled at the end of the shift.
A round is a sequence of readings, valve checks and observations, and a defect loses value the longer it takes to describe accurately. A photograph attached to the notification at the fault beats a description typed from memory an hour later.
Regasification, tank operations and jetty transfers run continuously with small crews spread over a large plot. Keeping the operator reachable at the work front, with a position fix on the record, does more than a radio and a camera carried separately.
Bulk storage, chemical berths and road loading gantries gauge, sample and transfer around the clock inside classified areas. A level, a temperature and a seal number captured where the work happens keeps the paperwork and the tank in agreement.
Certification is unfinished, so the workable Thai sequence is: specify now, evaluate when units are released, buy when the documents exist.
Send the zone, gas group, temperature class and ambient range off your classification drawing, and say whether the fleet also has to go offshore in the Gulf. That is enough for us to say where certification stands against it.
You get the datasheet plus a written certification schedule — what is running, its scope and the expected order — shaped for a Thai tender or an operator vendor pack.
Evaluation units are placed once certification allows, starting in safe areas on your own network and MDM. A week with a shift crew answers what no specification comparison can.
Type approval and importation sit with a company registered in Thailand, so volume supply runs through a Thai partner holding the approval and stocking spares locally. Pre-launch pricing is quoted on request against quantity and configuration.
Send your site, zone and gas group, and we will answer for your plant rather than in general.
Ask about Thailand →No. It is pre-launch and every certification, IECEx and ATEX included, is still running ahead of the Q4 2026 launch. Nothing should enter a classified area before the Certificate of Conformity covering it is issued.
Thai sites use flameproof loosely for anything usable in a classified area, but the concepts differ. Flameproof is Ex d, an enclosure built to contain an explosion inside itself. This device targets Ex ib, the intrinsically safe concept, where available energy is held below anything that could ignite the atmosphere at all.
None is published, and putting a figure against a device whose certification is unfinished would mislead you. Pre-launch pricing is given on request against a stated quantity and configuration, and the landed cost of a compliant unit carries the NBTC work and the import route with it.
Thai practice references the TIS standards administered by TISI, and those follow the international IEC 60079 series, so an IECEx Certificate of Conformity is the evidence a plant and its electrical authority work from. Your operator or estate may add review on top of it.
Yes. It is radio equipment, so NBTC type approval is required before it can be sold or put into service in Thailand, and it is held by an entity in country. That sits inside the launch schedule.
Gas and dust together, Zone 1 and Zone 21, against an ATEX marking target of II 2 G Ex ib IIC T4. A NEC 500 Class I Division 1 route runs alongside, for Thai packages written to the American code.
National paperwork opens that question rather than closing it. An IEAT estate runs its own permit and contractor access regime, and each operator inside it runs an equipment review of its own, so allow time for a site listing as well as for certification.
Bluetooth pairing with portable gas detectors is part of the design, and the interface, managed app list and manual set all run in Thai and English on one hardware build, so a mixed company and contractor crew can be issued the same device.
The Thai partner SAMS is appointing. Ex equipment may only be repaired by a workshop recognised to do it. Open an intrinsically safe handset in an ordinary phone shop and its certification is void.
Tell us the site, the zone and gas group, and roughly how many handsets. The SAMS team replies by email with the datasheet and the certification schedule for Thailand. The IS-04Z1 is pre-launch and certification is in progress, so there is no list price yet; indicative pricing is issued in writing against a stated quantity and site.
We are appointing Thai distributors that can hold NBTC type approval, already sell into the Map Ta Phut and Sriracha estates, and can carry spares and service locally. Tell us which operators and estates you are registered with.
Go deeper with the IS-04Z1: explosion proof phone for Petrochemical; explosion proof phone for Refining & Gas; explosion proof phone for Terminals & Ports; explosion proof phone for PTT Global Chemical; explosion proof phone for PTTEP; explosion proof phone for SCG Chemicals; explosion proof phone for Thai Oil.
Go deeper with the IS-04Z1: explosion proof phone for Laem Chabang; explosion proof phone for Map Ta Phut; explosion proof phone for Sriracha; explosion proof phone for Ban Chang; explosion proof phone for Bangkok; explosion proof phone for Gulf of Thailand; explosion proof phone for Pluak Daeng; explosion proof phone for Rayong; explosion proof phone for Samut Prakan; explosion proof phone for Saraburi; explosion proof phone for Songkhla.
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.
Buyers look for the IS-04Z1 in Thailand in different ways. Each guide below answers one buyer search honestly: what the term means, the route to buy, and where certification stands today.
