A fire you cannot see
Methanol burns with a nearly invisible flame, so detection and procedure carry more weight than eyesight. A handset in a classified area must not be an ignition source, which is what Ex ib IIC T4 intrinsic safety is for.
New Zealand · Methanex
Explosion proof mobile phone for Methanex, Taranaki
Methanex is a Canadian methanol producer, and its Motunui site in Taranaki is where an explosion proof mobile phone for New Zealand methanol work would be carried. The position matters first: on 1 September 2026 Methanex announced it will sell substantially all of its New Zealand gas entitlements and indefinitely idle Motunui in the first quarter of 2027. This page is for the HSE, engineering and shutdown teams who will still be working in that plant, and the contractors planning around them. The IS-04Z1 is designed around intrinsic safety rather than a flameproof enclosure.
Launching Q4 2026 · certification and vendor documentation in progress
Local approvalAS/NZS · IECExIECEx · AS/NZS in progress
AvailabilityQ4 2026via authorised distributors
The site · Methanex
What is classified at Motunui
Methanex has run a Taranaki methanol business for decades, and its recent history there is a story of shrinking gas supply. A plant at Waitara Valley was idled indefinitely in the first quarter of 2021, one of the two Motunui trains was idled in September 2024, and Methanex reports New Zealand output of 0.5 million tonnes in 2025 against 0.7 in 2024. What remains is a single-train plant whose process is conventional and fully classified: natural gas is reformed to synthesis gas rich in hydrogen and carbon monoxide, converted to methanol, distilled, stored in tanks and loaded for export. Methanol vapour is gas group IIA and burns with a flame that is hard to see in daylight; the synthesis gas at the front end is a hydrogen-rich IIC mixture. The site is at Motunui, close to OMV's Pohokura production station on Lower Otaraoa Road, which is how gas reaches it from the basin.
Operator and neighbours
- Methanex
- Canadian methanol producer operating at Motunui, Taranaki.
- Motunui, one train running
- One of two trains was idled in September 2024.
- Waitara Valley
- Idled indefinitely since the first quarter of 2021.
- Announcement, 1 September 2026
- Sale of New Zealand gas entitlements and indefinite idling in Q1 2027.
- OMV Pohokura production station
- Gas processing at Motunui, covered on the OMV page.
- Taranaki contractors
- Local engineering and maintenance firms, plus visiting turnaround crews.
Classified units
- Gas receipt and compression
- Natural gas, gas group IIA.
- Reforming and synthesis gas
- Hydrogen-rich IIC atmospheres at the front end.
- Methanol synthesis loop
- High-pressure process with methanol vapour, gas group IIA.
- Distillation
- Refined methanol streams, flammable liquid and vapour.
- Tank farm and loading
- Storage tanks and loading arrangements for export.
- Control rooms and workshops
- Safe areas outside the classified boundary.
Built for local conditions
What a methanol plant being put to sleep does to a handset
Most questions in this sector assume a plant that runs. Motunui is about to be run down, purged and preserved, which is a different kind of work with a different handset load.
IP ratingIP68
Battery4,000 mAh
Camera50 MP
OSAndroid 16
Purging, draining and isolation
Methanex said it will operate the plant for several months and then idle and preserve it. Draining, purging and isolating a plant is paperwork-heavy, and a photograph of each isolation next to its permit is evidence that survives a handover.
Quieter plant, longer walks
With sections out of service, rounds cover long distances with few people about. Four-constellation GNSS puts a position on the record, and the 4,000 mAh battery is specified for a shift with no recharge in the area.
Coastal Taranaki weather
Wind, rain and salt come with the location. IP68 sealing and rugged build suit a handset that spends its shift outside.
Use cases · Methanex
Where the IS-04Z1 goes to work.
Operations01
Rounds on the running train
Until idling, operators on the single train log readings, photograph leaks and call the control room from one device, instead of carrying a radio, a camera and a round sheet.
Shutdown02
Purge and isolation evidence
Each isolation point, blind and purge sequence can be photographed against the permit and recorded on an enrolled device, then handed to the next shift without a paper trail to chase.
Preservation03
Inspection rounds after idling
A mothballed plant still needs inspections of tanks, lines and corrosion points. These are small crews, often alone, where location reporting and a reliable phone matter more than throughput.
Procurement · Methanex
Selling an explosion proof mobile phone into New Zealand's methanol sector
Honest framing first: the IS-04Z1 launches in Q4 2026 and the idling is planned for the first quarter of 2027, so timing is tight. We have no relationship with Methanex and cannot describe its approval process. Any evaluation would run through the plant's engineering and HSE teams.
- Certificate evidence
- An IECEx Certificate of Conformity for Zone 1 gas, IIC and T4; none has been issued and certification is in progress.
- Plant classification
- Motunui's hazardous-area dossier decides which units need IIC and what the temperature limit is.
- Restart option
- Methanex described preserving the facility for possible restart, so equipment bought now may still have a use.
- Contractors
- Turnaround contractors normally work under the plant's permit system and carry only equipment the site has accepted.
Questions · Methanex
Frequently asked questions
Is it worth evaluating if Methanex is idling Motunui?
That is your judgement. A preserved plant still needs safe inspection, and other Taranaki gas and process sites share its hazards. The device is not specific to one operator.
Is the Waitara Valley plant still operating?
No. Methanex idled Waitara Valley indefinitely in the first quarter of 2021 because of insufficient gas supply, so a handset plan for Taranaki methanol is a Motunui plan.
Why does the gas group matter for a methanol plant?
Methanol vapour is IIA, but hydrogen in synthesis gas is IIC, the most demanding group. A device designed for IIC, as the IS-04Z1 is, covers the whole plant on one specification.
Does the idling change the classification?
Not by itself. Classification depends on what is in the equipment, so a purged and blanketed system may be treated differently from a live one. That is the plant's engineers' decision.
Enquiry · Methanex
Ask about the IS-04Z1 for Methanex, New Zealand
Tell us the site, the zone and gas group, and roughly how many handsets. The SAMS team replies by email with the datasheet and the certification schedule for New Zealand. The IS-04Z1 is pre-launch and certification is in progress, so there is no list price yet; indicative pricing is issued in writing against a stated quantity and site.
Enquiry · Methanex
Launching Q4 2026
Evaluating the IS-04Z1 for this site?
Tell us the zone, gas group and operator. We will send the datasheet and the certification schedule for your market.