T4 is the number to check
T4 means a maximum surface temperature of 135 degrees Celsius. That suits most hydrocarbons and many solvents, but not carbon disulfide, which is why Lenzing's page is blunt about it.
Austria · Chemicals, polymers and fibres
Explosion proof mobile phone for chemicals, polymers and fibres in Austria
Chemicals in Austria cover polyolefins, cellulose fibres, antibiotics and chlor-alkali, and no two of them share a hazard. This page is for HSE and engineering teams comparing where an explosion proof mobile phone can be used across those plants in Austria, and it shows how the IS-04Z1, an intrinsically safe Zone 1 and Zone 21 phone in certification ahead of its Q4 2026 launch, compares against each substance by gas group and temperature class.
Launching Q4 2026 · ATEX programme in progress
Local approvalATEX · VEXATATEX 2014/34/EU through the Explosionsschutzverordnung 2015 · in progress
AvailabilityQ4 2026via authorised distributors
The sector · Austria
Where an explosion proof mobile phone is used in Austrian chemicals, polymers and fibres
The useful way to read this sector is by substance, not by company. Polyolefin plants at Schwechat and Linz handle ethylene, propylene, hydrogen and polymer powder. Lenzing's fibre works handle carbon disulfide, hydrogen sulfide and cellulose dust. Sandoz at Kundl handles flammable solvents and pharmaceutical powders. A chlor-alkali plant such as Donau Chemie's at Brückl in Carinthia produces hydrogen as a by-product of electrolysis alongside chlorine. The gas group, the temperature class and the dust marking differ in each, and an honest supplier tells each plant where its product fits and where it does not.
Operators
- Borealis
- Polyolefins at Schwechat and Linz; see explosion proof phone for Borealis.
- Lenzing
- Viscose, modal and lyocell fibre in Upper Austria; see explosion proof phone for Lenzing.
- Sandoz
- Antibiotics at Kundl in Tirol; see explosion proof phone for Sandoz.
- Donau Chemie
- Chemical production at Brückl in Carinthia.
- Chemiepark Linz tenants
- Companies sharing a chemical park and its utilities.
Hazards by substance
- Ethylene and propylene
- Gas groups IIB and IIA; the IIC marking target covers both.
- Hydrogen
- Gas group IIC, present in polymerisation, chlor-alkali electrolysis and treating.
- Carbon disulfide
- IIC with a very low auto-ignition temperature; normally T6, so outside the T4 target.
- Process solvents
- Typically IIA or IIB with temperature classes that suit T4, as the plant defines.
- Polymer, cellulose and drug powders
- Zone 21 and Zone 22 dust where powder is in suspension.
- Chlorine
- Toxic rather than ignitable; not an Ex question.
Built for local conditions
What chemical plants do to a handset
The common thread is temperature class: a handset is useful in a plant only if its T class is below the lowest ignition temperature in the area.
IP ratingIP68
Battery4,000 mAh
Camera50 MP
OSAndroid 16
IIC is the broad gas group
Hydrogen sets the gas group to IIC. A device marked for IIC is not limited by it in polyolefin, chlor-alkali or solvent areas, but the certificate defines the exact scope.
Process safety is wider than ignition
Toxic gas such as chlorine and hydrogen sulfide is a separate hazard. A phone is not a detector, and personal monitors stay mandatory.
Many contractors, many sites
A chemical park has dozens of tenants. A managed handset with per-area policy lets one contractor team work across plants without carrying different devices.
Use cases · Chemicals and fibres
Where the IS-04Z1 goes to work in the sector.
Polymers01
Reactor and powder area inspection
Operators check gas and powder areas on one round with one device, recording photographs and positions.
Fibres02
Dust housekeeping and utilities
Cellulose dust areas and utility rooms can be inspected with a Zone 21 device, while carbon disulfide areas stay outside the target.
Pharma03
Solvent and powder areas under GMP
Solvent rounds and dust inspections are logged with the camera and position policies set by the plant's quality team.
Registration and access · Chemicals sector
What chemical operators would ask of a handset supplier
We have not found public handset supplier programmes at Borealis, Lenzing, Sandoz or Donau Chemie and claim none. All are Austrian employers with explosion protection documents, so the questions overlap. Ask each plant's procurement and HSE teams which supplier file, induction and approval steps apply, and expect different answers in a pharmaceutical plant and a polymer plant.
- Temperature class
- The certificate value against the lowest auto-ignition temperature in each area.
- Gas group and scope
- IIC coverage and any restriction named in the certificate.
- Dust marking
- Zone 21 marking and maximum surface temperature.
- Materials
- Housing and seal compatibility with process chemicals and cleaners.
- Documentation
- German manual and declaration of conformity.
Questions · Chemicals and fibres
Frequently asked questions
Is one certification enough for all these plants?
The certificate defines the scope. Each plant then compares it with its own classification, so the same device may be suitable for one area and not for another.
Why does the page say the device is not for carbon disulfide?
Because the target temperature class is T4, while carbon disulfide areas are normally T6. Certification is in progress and the final certificate sets the scope.
Is the IS-04Z1 certified?
No. Certification is in progress ahead of a Q4 2026 launch, and we have no customer relationship with any operator named here.
Enquiry · Chemicals, polymers and fibres
Ask about the IS-04Z1 for Chemicals, polymers and fibres, Austria
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 Austria. 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 · Chemicals, polymers and fibres
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.