Climate
Mild winters and warm, wet summers; about 1,192 mm of rain a year.
Pohang · Ex-proof
Ex-Proof Smartphone in Pohang
After four expansion phases the Pohang plant's crude steel capacity rose from 1.03 million tonnes a year at start-up to 9.1 million tonnes by 1983. 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 Ex-proof smartphone 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 topicEx-proof
DeviceSmartphone
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 · Ex-proof
Checklist: Ex-proof smartphone for Pohang
| Check | What to look for | IS-04Z1 today |
|---|---|---|
| Ex marking | Group, category, protection concept, gas group, temperature class | II 2 G Ex ib IIC T4 (target) |
| Gas group | IIA, IIB or IIC matched to the area drawing | IIC (target) |
| Temperature class | T-class below the ignition temperature of the gas | T4, 135 °C (target) |
| 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 at a glance: who is there, what is classified
A short profile of the site and the kinds of classified area that matter for portable equipment.
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
Steelworks
POSCO's Pohang plant was dedicated in 1973 and POSCO runs two integrated steelworks, at Pohang and Gwangyang.
Field notes · Pohang
More about Pohang that matters for portable equipment
Pohang: industry on the ground
POSCO's Pohang works runs three remaining blast furnaces after the first was shut down in December 2021, alongside basic oxygen and electric arc furnace routes.
Pohang: background
The local economy has combined iron, steel, shipbuilding and fisheries, and the city is now trying to diversify away from heavy industry towards advanced learning, environmental projects and culture.
Pohang: geography and layout
Pohang is the largest city in North Gyeongsang Province, with 499,363 residents in 2022, on Yeongil Bay at the mouth of the Hyeongsan River facing the East Sea.
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.
The term · Ex-proof
What “Ex-proof” means for a smartphone
“Ex-proof” is shorthand for equipment carrying an explosion-protection marking (the Ex mark) that matches the area it enters. The marking states the protection concept, gas or dust group and temperature class, and it must be backed by a certificate issued by a recognised body, so a phone described as Ex-proof should come with a certificate number you can check.
The IS-04Z1 is designed to carry the marking II 2 G Ex ib IIC T4. That is a target: certification is in progress, no certificate has been issued, and SAMS will publish the certificate numbers when they exist.
In Pohang. A marking check at a steelworks should note that process gases from coke-making and by-product gas systems are not typical oil and gas gases. Hydrogen-rich or carbon monoxide mixtures may need specific gas groups. The IS-04Z1 target marking is II 2 G Ex ib IIC T4, not yet issued, so the operator decides.
The route · specification
Specifying an Ex-proof smartphone 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 Ex-proof smartphone in Pohang today?
Not yet. The IS-04Z1 is pre-launch and its certification is still in progress ahead of a Q4 2026 launch. No unit goes into a classified area before the certificate covering it exists. The datasheet, the certification schedule and safe-area evaluation units are available now.
What does an Ex-proof smartphone in Pohang 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.
What Ex marking will the IS-04Z1 carry?
The marking target is II 2 G Ex ib IIC T4. It becomes a marking only when the certificate is issued; until then it is a design target.
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
Related guides for Pohang and for South Korea.
Industrial Mobile Phone Distributor in PohangSame place, different guide
Explosion-Proof Mobile Phone in PohangSame place, different guide
ATEX and IECEx Mobile Phone in PohangSame place, different guide
Intrinsically Safe Mobile Phone in PohangSame place, different guide
IECEx Mobile Phone in PohangSame place, different guide
Rugged 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 IncheonElsewhere in South Korea
ATEX and IECEx Mobile Phone Distributor in UlsanElsewhere in South Korea
ATEX and IECEx Mobile Phone Distributor in DaesanElsewhere 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?
Tell us the zone, gas group and operator. We will send the datasheet and the certification schedule.