GS Caltex
The Yeosu Complex covers about 6 million square metres, with a mixed feed cracker completed in November 2022 producing 900,000 tonnes of ethylene a year.
Yeosu · industrial
Industrial Smartphone in Yeosu
Yeosu is a south coast city of about 269,000 people hosting a major refining and petrochemical complex. GS Caltex's Yeosu Complex and Lotte Chemical's Yeosu plant create large Zone 1 and Zone 2 areas. This page explains what to look for in an industrial smartphone for Yeosu, 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 topicindustrial
DeviceSmartphone
RouteSpecification
WhereYeosu
Short answer. The SAMS IS-04Z1 is the intrinsically safe smartphone covered here for Yeosu: 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. A buyer's engineering review is separate from the certificate. Certification status. Place facts reviewed October 2026.
At a glance · industrial
Checklist: industrial smartphone for Yeosu
| Check | What to look for | IS-04Z1 today |
|---|---|---|
| Ingress protection | IP rating for dust and water | IP68 design |
| Fleet management | EMM and MDM support | Android 16 with EMM and MDM |
| Explosion protection | A separate certificate and marking | In progress; not issued |
| Where it applies | Yeosu: Refinery process units, Ethylene cracker and polymer plants, Chemical storage tank farms | Classified by the site operator |
Product · Yeosu
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 Yeosu. 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 · Yeosu
Yeosu 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
- GS Caltex
- Lotte Chemical
Classified areas to expect
- Refinery process units
- Ethylene cracker and polymer plants
- Chemical storage tank farms
- Marine loading jetties
Local conditions · Yeosu
What Yeosu means for portable equipment
Restructuring
Korea approved a restructuring plan in July 2026 involving Lotte Chemical's Yeosu operations and the Yeochun NCC integration.
Field notes · Yeosu
More about Yeosu that matters for portable equipment
Yeosu: industry on the ground
GS Caltex concentrates its refining and petrochemical plants at the Yeosu Complex, which covers about 6 million square metres, making the complex a large single-site hazardous-area environment.
Yeosu: geography and layout
Yeosu consists of a peninsula and 365 islands, 48 of them inhabited, midway along South Korea's southern coast beside the Bay of Suncheon, with a population of about 269,000.
Yeosu: climate and equipment wear
Yeosu has a humid subtropical climate with very warm summers and cold winters, and from June to August more than 200 mm of rain falls each month.
Yeosu: who works there
GS Caltex is owned in equal shares by Chevron and GS Energy and was founded in 1967 as Korea's first private oil company, so it follows long-established corporate safety systems.
The term · industrial
What “industrial” means for a smartphone
“Industrial” describes a phone built for plant conditions: sealed, drop-resistant and manageable at fleet scale through Android Enterprise. It does not by itself mean the phone may enter a classified area. Only a device with a valid explosion-protection certificate and marking may do that.
The IS-04Z1 is designed to be both an industrial Android phone (IP68, 4,000 mAh battery, 50 MP camera, Android 16 with EMM and MDM support) and an intrinsically safe one. Its explosion-protection certificates are in progress and have not been issued.
In Yeosu. A restructuring involving Lotte Chemical's Yeosu operations was approved in July 2026, so purchasing and contractor lists may change. Purchasing is normally handled by the operator or its maintenance contractors. A managed fleet under EMM or MDM should be enrolled to whichever route is confirmed.
The route · specification
Specifying an industrial smartphone for Yeosu
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 · Yeosu
Frequently asked questions
Can we buy an industrial smartphone in Yeosu 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 industrial smartphone in Yeosu 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.
Is the IS-04Z1 an industrial phone as well as an Ex phone?
Yes by design: IP68 sealing, a 4,000 mAh battery, a 50 MP camera and Android 16 with EMM and MDM support. The explosion-protection certificates are separate and still in progress.
Which areas at Yeosu would use it?
Likely candidates are refinery process units, ethylene cracker and polymer plants, chemical storage tank farms, marine loading jetties. 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.
What are the main hazardous-area risks at the Yeosu complex?
Refining units, a heavy-oil upgrading facility, an olefins cracker, aromatics and polypropylene plants together create flammable vapour and gas areas, including ethylene and aromatic hydrocarbons. The operator sets zones and gas groups, so ask for classification drawings before bringing devices.
Is Yeosu convenient for equipment delivery?
The city has an industrial port coast and rail and road links to Gwangju and other Korean cities, so delivery is feasible, though customs and approvals take time for imported electronics. Confirm lead times with your forwarder and the site's gate rules.
Will the restructuring at Yeosu change who approves equipment?
It may. A restructuring plan involving Lotte Chemical's Yeosu operations was approved, and its status could change. Procurement and HSE contacts may be in transition. Confirm requirements with the site operator before sending any documents.
Related guides
Keep exploring
Other guides for Yeosu, other places in South Korea, and the pages behind them.
Explosion-Proof Mobile Phone in YeosuSame place, different guide
Ex-Proof Mobile Phone Distributor in YeosuSame place, different guide
Hazardous Area Mobile Phone in YeosuSame place, different guide
Intrinsically Safe Mobile Phone Distributor in YeosuSame place, different guide
ATEX and IECEx Mobile Phone Distributor in YeosuSame place, different guide
IECEx Mobile Phone Distributor in YeosuSame place, different guide
ATEX and IECEx Mobile Phone Distributor in PohangElsewhere 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
ATEX and IECEx Mobile Phone Distributor in IncheonElsewhere in South Korea
South Korea market guideCertification route and regulators
All guides for South KoreaEvery route we cover
Certification statusWhat is in progress
Enquiry · Yeosu
Ask about the IS-04Z1 for Yeosu, South Korea
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 · Yeosu
Launching Q4 2026
Planning for Yeosu?
Tell us the zone, gas group and operator. We will send the datasheet and the certification schedule.