Environment
The setting is remote, with cold winters. Low-temperature performance and battery life are practical concerns for portable equipment.
Satellite land-cover data show about 46 square kilometres of developed land around Williston in 2024, showing how energy development left a lasting footprint on a rural town. Zone 1 work arises at drilling rigs, wellsites, tank batteries and gas gathering facilities. This page explains what to look for in a rugged smartphone for Bakken, North Dakota (Williston Basin), and where the IS-04Z1 stands against that list today.
Pre-launch · certification in progress · Launching Q4 2026
Short answer. The SAMS IS-04Z1 is the intrinsically safe smartphone covered here for Bakken, North Dakota (Williston Basin): pre-launch, designed for Zone 1 and Zone 21 (marking target Ex ib IIC T4), with certification in progress and no certificate issued.
Current position: certification in progress, nothing issued, launch targeted for Q4 2026. 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 |
|---|---|---|
| Ingress protection | IP65 to IP68 sealing | IP68 design |
| Drop and shock | A stated drop height onto concrete | Specification on request |
| Explosion protection | A separate certificate and marking | In progress; not issued |
| Where it applies | Bakken, North Dakota (Williston Basin): Drilling rigs, Wellsites and tank batteries, Gas gathering and processing | Classified by the site operator |

An intrinsically safe Android smartphone designed for Zone 1 and Zone 21 hazardous areas in North Dakota Bakken. 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.
The setting is remote, with cold winters. Low-temperature performance and battery life are practical concerns for portable equipment.
Oil was discovered in the Williston Basin in 1951. Horizontal drilling and hydraulic fracturing lifted output, and North Dakota and Montana together passed 1 million barrels a day in April 2014.
The Bakken is relatively thin, no more than 250 feet, with low permeability, so better knowledge of where the resource lies has translated directly into higher output.
Williston, founded in 1887, had 29,160 residents in 2020, its population nearly doubling between 2010 and 2020 because of the oil boom.
Williston has a cold semi-arid climate with a January mean near 11.5 degrees Fahrenheit, about 39 days a year with lows of zero or below, and extremes from minus 50 to 110 degrees.
North Dakota crude oil production passed 1.0 million barrels a day, driven by the Bakken and Three Forks formations of the Williston Basin in North Dakota and eastern Montana.
A rugged phone is built to survive water, dust, drops and rough handling, usually rated by an IP code and a drop specification. Ruggedness is an environmental property: it says nothing about whether a phone may be used where flammable gas or dust is present. That is decided by explosion-protection certification and marking.
The IS-04Z1 combines both: an IP68 sealed rugged build and a design for Zone 1 and Zone 21 (marking target Ex ib IIC T4). The explosion-protection certificates are in progress and none has been issued.
In Bakken, North Dakota (Williston Basin). The Bakken is remote with cold winters, so low-temperature performance and battery life are practical concerns for portable equipment. IP68 sealing helps against snow melt, dust and wet hands, but it does not give explosion protection. The IS-04Z1 specifies a 4,000 mAh battery; cold-weather runtime should be evaluated.
A short checklist for anyone writing or reviewing the specification, with the IS-04Z1 status against each point.
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.
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.
It is designed to IP68 sealing, with glove-friendly controls. Ruggedness is not explosion protection: that depends on the certificates, which are in progress.
Likely candidates are drilling rigs, wellsites and tank batteries, gas gathering and processing, crude loading facilities. Which areas are classified, and to what zone, is set by the site operator's own area classification drawings.
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.
Wellpads and associated tank and compressor areas can contain flammable gas and vapour, and the operator defines classified areas and approvals. Always ask for the site's area classification and equipment policy before entering.
Williston records a January mean around 11.5 degrees Fahrenheit and several days a year at minus 20 or lower. Check a handset's low-temperature operating range and battery performance in the cold, and keep spare batteries warm inside clothing.
The Bakken is remote with cold winters, so low-temperature performance and battery life are practical concerns for portable equipment. Check the datasheet's operating range once published, keep spare charged devices in a safe, warm area, and trial the phone in your own conditions. Confirm limits with the site operator.
More on North Dakota Bakken, and on other places in United States.
Tell us what you need to equip and where. The SAMS team answers by email with the datasheet and where each certification route stands.
Tell us the zone, gas group and operator. We will send the datasheet and the certification schedule.