Environment
The setting is remote, with cold winters. Low-temperature performance and battery life are practical concerns for portable equipment.
North Dakota Bakken · Ex-proof
Ex-Proof Mobile Phone in North Dakota Bakken
The city sits at the crossroads of US Highways 2 and 85, near the Missouri and Yellowstone rivers, about 18 miles from Montana and 60 miles from the Canadian border. Zone 1 work arises at drilling rigs, wellsites, tank batteries and gas gathering facilities. If you are specifying an Ex-proof mobile phone for Bakken, North Dakota (Williston Basin), 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
WhereNorth Dakota Bakken
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.
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 Bakken, North Dakota (Williston Basin)
| 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 | Bakken, North Dakota (Williston Basin): Drilling rigs, Wellsites and tank batteries, Gas gathering and processing | Classified by the site operator |
Product · North Dakota Bakken
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 North Dakota Bakken. 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 · Bakken, North Dakota (Williston Basin)
Working in Bakken, North Dakota (Williston Basin): operators and classified areas
The companies on site and the hazardous-area types a handset is likely to meet there.
Operators and companies on site
- Continental Resources
- Chord Energy
- Chevron (via Hess)
- EOG Resources
Classified areas to expect
- Drilling rigs
- Wellsites and tank batteries
- Gas gathering and processing
- Crude loading facilities
Local conditions · Bakken, North Dakota (Williston Basin)
Conditions in Bakken, North Dakota (Williston Basin) that affect handheld equipment
History
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.
Field notes · Bakken, North Dakota (Williston Basin)
More about Bakken, North Dakota (Williston Basin) that matters for portable equipment
Bakken, North Dakota (Williston Basin): geography and layout
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.
Bakken, North Dakota (Williston Basin): people and language
Williston, founded in 1887, had 29,160 residents in 2020, its population nearly doubling between 2010 and 2020 because of the oil boom.
Bakken, North Dakota (Williston Basin): climate and equipment wear
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.
Bakken, North Dakota (Williston Basin): industry on the ground
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.
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 Bakken, North Dakota (Williston Basin). A marking check at a drilling rig, tank battery or gas gathering site would match zone, gas group and temperature class with the operator's classification. The IS-04Z1 target is II 2 G Ex ib IIC T4, intended for Zone 1 gas. The operator determines what group and class actually apply at each location.
The route · specification
Specifying an Ex-proof mobile phone for North Dakota Bakken
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 · North Dakota Bakken
Frequently asked questions
Can we buy an Ex-proof mobile phone in North Dakota Bakken today?
No. Nothing can be bought or taken into a classified area today: certification is in progress and launch is planned for Q4 2026. What is available now is the datasheet, the written certification schedule and evaluation units for safe-area use.
What does an Ex-proof mobile phone in North Dakota Bakken 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 Bakken, North Dakota (Williston Basin) would use it?
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.
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.
What equipment issues are specific to oil production wellpads?
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.
How cold does it get for Bakken fieldwork, and what does that mean for handsets?
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.
How does North Dakota winter affect a handheld in the field?
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.
Related guides
Keep exploring
Related guides for North Dakota Bakken and for United States.
Hazardous Area Mobile Phone in North Dakota BakkenSame place, different guide
Explosion-Proof Mobile Phone Distributor in North Dakota BakkenSame place, different guide
Intrinsically Safe Mobile Phone in North Dakota BakkenSame place, different guide
IECEx Mobile Phone in North Dakota BakkenSame place, different guide
Industrial Mobile Phone in North Dakota BakkenSame place, different guide
Rugged Mobile Phone Distributor in North Dakota BakkenSame place, different guide
ATEX and IECEx Mobile Phone Distributor in HoustonElsewhere in United States
ATEX and IECEx Mobile Phone Distributor in Corpus ChristiElsewhere in United States
ATEX and IECEx Mobile Phone Distributor in Permian BasinElsewhere in United States
ATEX and IECEx Mobile Phone Distributor in Gulf of Mexico RigsElsewhere in United States
United States market guideCertification route and regulators
All guides for United StatesEvery route we cover
Certification statusWhat is in progress
Enquiry · Bakken, North Dakota (Williston Basin)
Ask about the IS-04Z1 for Bakken, North Dakota (Williston Basin), 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.
Enquiry · Bakken, North Dakota (Williston Basin)
Launching Q4 2026
Planning for North Dakota Bakken?
Tell us the zone, gas group and operator. We will send the datasheet and the certification schedule.