Steelworks
POSCO's Pohang plant was dedicated in 1973 and POSCO runs two integrated steelworks, at Pohang and Gwangyang.
Pohang · intrinsically safe
Intrinsically Safe Mobile Phone in Pohang
Pohang is North Gyeongsang's largest city, with about 491,000 residents, on the East Sea coast beside Yeongil Bay. It is headquarters of POSCO, which has an integrated steelworks there, and steel plant gas systems and dust create classified areas. This page explains what to look for in an intrinsically safe mobile phone for Pohang, 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
WherePohang
Short answer. The SAMS IS-04Z1 is the intrinsically safe smartphone covered here for Pohang: pre-launch, designed for Zone 1 and Zone 21 (marking target Ex ib IIC T4), with certification in progress and no certificate issued.
For the record, no certificate exists for the IS-04Z1 today. The programme is under way ahead of a Q4 2026 launch. Operator approval runs on its own timeline. Certification status. Place facts reviewed October 2026.
At a glance · intrinsically safe
Checklist: intrinsically safe mobile phone for Pohang
| 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 | Pohang: Steelworks process gas systems, Coke-making and by-product gas, Steel plant dust areas | Classified by the site operator |
Product · Pohang
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 Pohang. 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 site · Pohang
Pohang: where the IS-04Z1 would work
Who operates there and which kinds of classified area a handset would meet, from the SAMS site research.
Operators and companies on site
- POSCO
Classified areas to expect
- Steelworks process gas systems
- Coke-making and by-product gas
- Steel plant dust areas
Local conditions · Pohang
What Pohang means for portable equipment
Port
Yeongil Bay supports a port that handled 54.8 million tonnes in 2006.
Field notes · Pohang
More about Pohang that matters for portable equipment
Pohang: climate and equipment wear
Pohang has a humid subtropical climate, with a January mean of 2.2 degrees Celsius, an August mean of 26.0 degrees and about 1,152 mm of rain a year, peaking in August at around 227 mm.
Pohang: industry on the ground
The steelmaker POSCO was inaugurated in Pohang in 1968 and its local plant began production in the early 1970s, bringing heavy industry to a city that had about 50,000 people in the 1960s.
Pohang: people and language
The city is promoting itself as a diversified centre of environmentalism, advanced learning and culture, to reduce its reliance on heavy industry such as steelmaking.
Pohang: logistics and access
Pohang's shipping port and road arteries made it strategically significant in the mid-twentieth century, and the port remains the city's sea gateway on the East Sea coast.
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 Pohang. Plant rounds cover gas systems, coke-making areas and dust-prone yards over a large integrated works. A handheld intrinsically safe phone is intended for inspections where readings and photographs are needed near gas lines. Use depends on certification in progress and on the plant's own permit procedures.
The route · specification
Specifying an intrinsically safe mobile phone for Pohang
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 · Pohang
Frequently asked questions
Can we buy an intrinsically safe mobile phone in Pohang 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 intrinsically safe mobile phone in Pohang 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.
Which areas at Pohang would use it?
Likely candidates are steelworks process gas systems, coke-making and by-product gas, steel plant dust areas. Which areas are classified, and to what zone, is set by the site operator's own area classification drawings.
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.
Is Pohang reliant on one employer for contractor work?
POSCO's plant has anchored the local economy since 1972, so much industrial contracting there is linked to it, though shipbuilding and other industries also exist. Contractors typically register through the operator's own vendor and safety processes, so confirm the current route.
What hazardous-area risks are typical at a steelworks like Pohang?
Steel plants involve coke-oven, blast-furnace and converter gases that are toxic and flammable, plus oxygen enrichment, coal and iron-ore dust and fuel gas systems. The operator defines gas and dust zones, so ask for classification drawings before bringing handheld devices.
Who registers suppliers at the Pohang works?
POSCO runs its own supplier registration and safety approvals, and SAMS has no role in them. A supplier or distributor would need to approach its procurement and HSE teams directly. Confirm requirements with the site operator, and note that the IS-04Z1 is still pre-launch.
Related guides
Keep exploring
Other guides for Pohang, other places in South Korea, and the pages behind them.
Rugged Mobile Phone Distributor in PohangSame place, different guide
Hazardous Area Mobile Phone in PohangSame place, different guide
Explosion-Proof Mobile Phone in PohangSame place, different guide
IECEx Mobile Phone in PohangSame place, different guide
Ex-Proof Mobile Phone Distributor in PohangSame place, different guide
Industrial Mobile Phone in PohangSame place, different guide
ATEX and IECEx Mobile Phone Distributor in BusanElsewhere in South Korea
ATEX and IECEx Mobile Phone Distributor in YeosuElsewhere in South Korea
ATEX and IECEx Mobile Phone Distributor in DaesanElsewhere in South Korea
ATEX and IECEx Mobile Phone Distributor in UlsanElsewhere in South Korea
South Korea market guideCertification route and regulators
All guides for South KoreaEvery route we cover
Certification statusWhat is in progress
Enquiry · Pohang
Ask about the IS-04Z1 for Pohang, South Korea
Share the site details and quantity. You will get the datasheet and the certification schedule back by email; pricing is indicative only until launch.
Enquiry · Pohang
Launching Q4 2026
Planning for Pohang?
Name the site and the operator and we will send what is available before launch.