Underground storage
Jurong Rock Caverns, 150 metres below ground, can store up to 1.47 million cubic metres (around 9 million barrels) of liquid hydrocarbons, adding below-ground classified areas.
Jurong Island · Ex-proof
Ex-Proof Mobile Phone in Jurong Island
Singapore produces no crude oil or feedstock of its own, so Jurong Island plants run on imported material delivered by sea, which makes jetties, tank farms and transfer lines a constant feature of the site. It hosts over 100 global companies in refining, olefins and chemical manufacturing, so gas and vapour (Zone 1) areas are widespread. If you are specifying an Ex-proof mobile phone for Jurong Island, this page covers the markings, the approvals and the current certification status of the IS-04Z1.
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
DeviceMobile Phone
RouteSpecification
WhereJurong Island
Short answer. The SAMS IS-04Z1 is the intrinsically safe smartphone covered here for Jurong Island: 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. An operator's own vendor approval is a separate step. Certification status. Place facts reviewed October 2026.
At a glance · Ex-proof
Checklist: Ex-proof mobile phone for Jurong Island
| 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 | Jurong Island: Chemical and petrochemical plants, LNG storage and loading, Underground rock cavern storage | Classified by the site operator |
Product · Jurong Island
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 Jurong Island. 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 · Jurong Island
Jurong Island: 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
- Aster Chemicals and Energy
- Singapore LNG Corporation (SLNG)
- ExxonMobil
- BASF
Classified areas to expect
- Chemical and petrochemical plants
- LNG storage and loading
- Underground rock cavern storage
- Marine jetties
Local conditions · Jurong Island
Site conditions at Jurong Island: what wears and what limits equipment
Energy and water security
JTC states that the island also hosts power generation and desalination plants and supports Singapore's natural gas supply, so work there covers utilities as well as process plants.
Field notes · Jurong Island
More about Jurong Island that matters for portable equipment
Jurong Island: industry on the ground
Singapore Refining Company runs a refinery on Jurong Island able to process 290,000 barrels of crude a day, producing fuel products and chemical feedstocks for domestic and export markets.
Jurong Island: infrastructure
The caverns hold about 9.2 million barrels across five isolated storage caverns and store crude oil, condensate, naphtha and gasoil, so vapour-handling surface facilities sit above a very large underground inventory.
Jurong Island: logistics and access
Visitors enter through the Jurong Island Checkpoint, where they exchange an identity card or passport for a Jurong Island visitor pass before travelling on to the plant they are visiting.
Jurong Island: rules and approvals
One refinery on the island forbids mobile phones and other electrical or electronic equipment in its process plant and classified hazardous areas, and requires visitors to declare cameras, computers and laptops at security.
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 Jurong Island. A cluster of refineries, crackers and petrochemical plants means gas groups can vary by plant, so a marking check should read zone, gas group and temperature class from each operator's classification. The IS-04Z1 target marking is II 2 G Ex ib IIC T4. Whether IIC is required is for the operator to say.
The route · specification
Specifying an Ex-proof mobile phone for Jurong Island
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 · Jurong Island
Frequently asked questions
Can we buy an Ex-proof mobile phone in Jurong Island 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 Ex-proof mobile phone in Jurong Island 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 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 Jurong Island would use it?
Likely candidates are refinery and cracker process units, chemical and petrochemical plants, lng storage and loading, underground rock cavern storage. 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.
Can I bring a mobile phone into a plant on Jurong Island?
Usually not into process or classified areas unless the equipment is approved for the zone and the operator permits it. One refinery on the island publishes a ban on phones and other electronic equipment in those areas. Ask your site sponsor which devices are accepted and whether a permit is needed.
How large is refining activity on Jurong Island?
One refinery on the island states a crude processing capacity of 290,000 barrels a day, and other chemical and refining operators share the same island. Because feedstock arrives by sea, expect busy jetty, tank and pipeline areas where Zone 1 and Zone 2 conditions are common.
Can contractors move one device between plants?
Not automatically. Each plant runs its own contractor and equipment approvals and permit system, so a device accepted at one plant may need separate approval at another. Ask each plant's HSE team for its process, and plan enrolment and permits per client.
Related guides
Keep exploring
Other guides for Jurong Island, other places in Singapore, and the pages behind them.
Intrinsically Safe Mobile Phone Distributor in Jurong IslandSame place, different guide
Explosion-Proof Mobile Phone Distributor in Jurong IslandSame place, different guide
ATEX and IECEx Mobile Phone in Jurong IslandSame place, different guide
Hazardous Area Mobile Phone Distributor in Jurong IslandSame place, different guide
Industrial Mobile Phone Distributor in Jurong IslandSame place, different guide
IECEx Mobile Phone Distributor in Jurong IslandSame place, different guide
ATEX and IECEx Mobile Phone Distributor in Singapore MarineElsewhere in Singapore
ATEX and IECEx Mobile Phone Distributor in Singapore LNGElsewhere in Singapore
ATEX and IECEx Mobile Phone Distributor in Pulau Bukom RefineryElsewhere in Singapore
ATEX and IECEx Mobile Phone Distributor in Loyang OffshoreElsewhere in Singapore
Singapore market guideCertification route and regulators
All guides for SingaporeEvery route we cover
Certification statusWhat is in progress
Enquiry · Jurong Island
Ask about the IS-04Z1 for Jurong Island, Singapore
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 · Jurong Island
Launching Q4 2026
Planning for Jurong Island?
Tell us the zone, gas group and operator. We will send the datasheet and the certification schedule.