Scale
Fortune Indonesia lists Cilacap as the largest Pertamina refinery and reports it supplies about a third of national fuel demand.
Cilacap, on the south coast of Central Java, has Pertamina's Refinery Unit IV, the largest in Indonesia at 348,000 barrels per day. Crude distillation, cracking and storage areas are Zone 1 environments. An Ex-proof smartphone distributor in Cilacap Refinery, Central Java would carry the IS-04Z1 to these buyers once certification completes.
Pre-launch · certification in progress · Launching Q4 2026
Short answer. Cilacap Refinery, Central Java has no appointed SAMS distributor yet: the IS-04Z1 is pre-launch (certification in progress, no certificate issued, launch planned for Q4 2026), and distributor applications are open.
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.
| 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 | Cilacap Refinery, Central Java: Refinery process units, Crude and product tank farms, Marine loading facilities | Classified by the site operator |

An intrinsically safe Android smartphone designed for Zone 1 and Zone 21 hazardous areas in Cilacap Refinery. It is pre-launch: IECEx, ATEX and NEC 500 certification is in progress ahead of the Q4 2026 launch.
Who operates there and which kinds of classified area a handset would meet, from the SAMS site research.
Fortune Indonesia lists Cilacap as the largest Pertamina refinery and reports it supplies about a third of national fuel demand.
Sources quote 345,000 to 348,000 barrels per day, so check the current rating with the operator.
Cilacap is Indonesia's largest refinery at about 348 thousand barrels a day, ahead of Balikpapan, Dumai, Musi, Balongan and Tuban, which together made up the national refining capacity of 1.15 million barrels a day at the end of 2024.
Cilacap's port is one of only a few on Java's southern coast able to handle ships of reasonable tonnage, sheltered by Nusakambangan island, and Tunggul Wulung Airport offers scheduled flights to Jakarta and Semarang.
PT Kilang Pertamina Internasional, a Pertamina subsidiary, manages the refinery and has appointed outside consultants for asset integrity work, so contractor engagement typically runs through that company's procurement rules.
The asset programme includes a physical verification of the facility, an equipment criticality assessment and identification of safety critical elements, which shows asset registers and safety-critical equipment lists are being formalised on site.
“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 Cilacap Refinery, Central Java. A marking check at Cilacap would match the label to the zone, gas group and temperature class assigned to each unit or tank farm. Fuel vapours typically sit within IIA or IIB, so IIC is conservative. The IS-04Z1 target marking is II 2 G Ex ib IIC T4, not approved.
Distribution of the IS-04Z1 is by authorised partners only, and SAMS has not yet granted a territory for Cilacap Refinery, Central Java. Each application is reviewed on its merits. Because opening a certified Ex handset in an ordinary workshop invalidates its certificate, the partner must be able to support and service the device locally.
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.
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.
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.
Likely candidates are refinery process units, crude and product tank farms, marine loading facilities. Which areas are classified, and to what zone, is set by the site operator's own area classification drawings.
Apply through the distributor page with your company details and the territory you cover. SAMS reviews applications company by company and has not yet granted a territory for Cilacap Refinery, Central Java.
It can be, because a refinery of this size typically runs continuous operations and periodic turnarounds that need many handheld devices. Plan spares, batteries and chargers in line with site rules, and check import and radio type-approval requirements first.
Refinery Unit IV is part of Pertamina's refining business under PT Kilang Pertamina Internasional. Suppliers and contractors typically register through Pertamina procurement and follow the unit's own safety induction and permit-to-work rules, so confirm the current route with the refinery.
Only indirectly. Published capacity figures vary slightly, but what matters for a device is the area classification and the operator's approval rules. Ask Pertamina for the current zone drawings and equipment procedure. Confirm with the site operator.
Other guides for Cilacap Refinery, other places in Indonesia, and the pages behind them.
Share the site details and quantity. You will get the datasheet and the certification schedule back by email; pricing is indicative only until launch.
Send the zone and gas group of your site and we will reply with the datasheet and schedule.