Saraburi is where Thailand makes much of its cement. Limestone hills in Kaeng Khoi and the surrounding districts feed kilns, quarries and crushing plants, and a large industrial estate at Nong Khae adds building materials, electronics, consumer goods and power. Here the hazard is more often dust than vapour: fine limestone, coal and alternative fuels, handled in mills, silos and baghouses. A handset decision turns on dust ingress and the dust zone as much as on a gas group. The IS-04Z1 is pre-launch, with certification in progress.
Launching Q4 2026 · ATEX and IECEx certification in progress
Saraburi lies north of Bangkok on Highway 1, some 70 km from the capital at Nong Khae, and its limestone supports several cement producers. Most of the province's heavy plant stands in Kaeng Khoi and neighbouring districts, while a separate industrial estate at Nong Khae hosts manufacturers of many kinds. Details below come from company and industry sources; whether any given area is classified is the operator's decision, not an assumption to make from the sector.
Dust is the main fact of life across this province. Residents and authorities have complained about fine dust from quarries and cement plants for years, and plant staff work in it. The points below are design intent measured against what that does to a handset, not certified claims.
Limestone and cement dust coats screens, camera lenses, speaker meshes and charging contacts. IP68 means the case is dust-tight as well as waterproof, which matters more here than almost anywhere in Thailand. Cleaning and inspection routines still need to be set by the plant.
Zone 21 dust areas around mills and silos sit near Zone 1 gas where fuels are stored or burners are lit. Zone 21 coverage is a design target, and the certificate will state exactly which dust and gas classes the handset is approved for. One specification across both is the aim.
A dust layer on a warm surface behaves differently from a gas cloud, and a handset left under a hopper or on a hot casing can accumulate it. The T4 target covers surface temperature for gas; the dust temperature limit will depend on the certified dust marking and the operator's own rules.
Central Thailand is hot in the dry months before the rains arrive in about May. Open conveyors, quarry faces and stockpiles are exposed to both. The certified ambient range is the compliance figure, while the sealing and rugged build target the wet and the dusty extremes.
Kiln relines and annual stops bring large contractor crews from outside the province. EMM enrolment lets the plant issue a managed handset with an approved camera and application policy for the period and take it back afterwards, with Thai and English interfaces on one Android 16 build.
Dust in Saraburi is a public concern, so evidence of equipment safety is likely to be examined by the operator's own HSE team before it is accepted. Certification is in progress and no handset is represented as approved until a certificate exists to put in the plant file.
Coal and petcoke mills and their filters are among the first areas a dust assessment looks at. An operator who can photograph a filter, a conveyor seal or a hot spot and record it on the spot, using a device designed for the zone, makes better use of every round.
Alternative fuels bring new storage and feed equipment, with fire risk as well as dust. A sealed handset that can log condition photographs and a location from the yard, subject to the plant's own classification, replaces paper notes written later from memory.
Supervisors in quarries and crusher plants work outdoors in fine dust and glare. A rugged, sealed handset that is managed centrally keeps radio and photograph records in one place, with the operator's own policy deciding which applications and cameras are allowed.
At an industrial estate, individual factories decide their own classification. A tenant with a solvent store or a powder line can use the same device pool and management console as a cement plant, with its own enrolment and restrictions.
Not yet. The IS-04Z1 is pre-launch and its IECEx, ATEX and NEC 500 Class I Division 1 certification is in progress with TÜV in Germany ahead of a Q4 2026 launch. The datasheet, the schedule and safe-area evaluation units are available now. No unit goes into a classified area before the certificate covering it exists.
No price is published. While certification is in progress there is no list price and no committed lead time, and a supplier quoting a firm figure for an uncertified Ex handset is promising something it cannot stand behind. Indicative pre-launch pricing is issued in writing against a stated quantity and site.
Zone 21 is a design target, but nothing is claimed until the certificate says so. The ATEX marking target on the datasheet is II 2 G Ex ib IIC T4, which is a gas marking. A buyer should ask for the dust marking once it is issued and compare it with the plant's own classification.
The plant decides, using its own area classification and permit rules. Thai practice references TIS standards administered by TISI, with factory safety under the Department of Industrial Works, and a handset needs NBTC radio approval. Confirm the route with the operator and the authorities concerned, since each plant may differ.
The design target is IP68, which includes dust-tight sealing, but no service terms are published at this stage. Dust can still clog speaker meshes and contacts in service, so operators should plan cleaning routines. Service terms are to be confirmed in writing by SAMS when they are fixed.
SAMS provides support, and the partner it is appointing would be the first line in Thailand. Saraburi is within reach of Bangkok by road, but a buyer should still ask before ordering how loan units, spares and return-for-repair are handled and have the answers written down.
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 Thailand. 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.
Tell us the zone, gas group and operator. We will send the datasheet and the certification schedule for your market.
