Climate
Houston has a humid subtropical climate with long hot summers and exposure to Gulf hurricanes and flooding, which shapes outdoor work and turnaround planning.
Houston has a humid subtropical climate, with highs of at least 90 degrees Fahrenheit on an average of 106.5 days a year and winds from the south and southeast carrying Gulf moisture. Zone 1 and Zone 21 areas arise at process units, tank farms and loading docks along the channel. Distribution partners for Houston and the Houston Ship Channel are being identified ahead of the Q4 2026 launch of the IS-04Z1.
Pre-launch · certification in progress · Launching Q4 2026
Short answer. Houston and the Houston Ship Channel has no appointed SAMS distributor yet: the IS-04Z1 is pre-launch (certification in progress, no certificate issued, launch planned for Q4 2026), and distributor applications are open.
Where things stand: the IS-04Z1 has not launched, and none of its four certification routes has produced a certificate yet. 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 |
|---|---|---|
| Zone | 0, 1 or 2 for gas; 20, 21 or 22 for dust | Designed for Zone 1 and Zone 21 |
| Gas group | IIA, IIB or IIC | IIC (target) |
| Area drawing | The operator's own classification drawing | Decided by the site operator |
| Where it applies | Houston and the Houston Ship Channel: Tank farms, Dock and terminal loading areas, Refinery process units | Classified by the site operator |

An intrinsically safe Android smartphone designed for Zone 1 and Zone 21 hazardous areas in Houston. 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.
Houston has a humid subtropical climate with long hot summers and exposure to Gulf hurricanes and flooding, which shapes outdoor work and turnaround planning.
The channel is roughly 50 miles long and is described as the second-largest petrochemical complex in the world. Port Houston operates eight public facilities along it.
Houston is 165 miles east of Austin, 88 miles west of the Louisiana border and 250 miles south of Dallas, which makes it a natural road hub for Gulf Coast plants.
Greater Houston had about 7.8 million residents at the 2020 census and is recognised worldwide for oil and gas, giving contractors and engineers a very deep local labour pool.
The Houston Ship Channel is 530 feet wide, 45 feet deep and 50 miles long, and has been deepened repeatedly to take larger ships.
The channel and surrounding area support the second-largest petrochemical complex in the world, built because of the nearby Texas oilfields.
A hazardous area is a place where flammable gas, vapour or combustible dust may be present. Standards divide these into zones: Zones 0, 1 and 2 for gas and vapour, and Zones 20, 21 and 22 for dust. Zone 1 and Zone 21 are the tier where an explosive atmosphere is likely to occur in normal operation, which is where the IS-04Z1 is designed to work. Anything carried in must be marked for the zone, gas group and temperature class of the area.
No certificate has been issued for the IS-04Z1 yet, so it must not be taken into a classified area until the certificate covering it exists and the site operator has accepted it.
In Houston and the Houston Ship Channel. Classified areas here include refinery process units, petrochemical plants, tank farms and dock or terminal loading areas. The facility operator, not SAMS, carries out the area classification and decides which equipment may enter each zone. A supplier datasheet only helps the operator compare the marking with that classification; it does not classify anything.
A distributor for Houston and the Houston Ship Channel would carry the IS-04Z1 after certification completes; the Q4 2026 launch is the planning date and no appointment has been made. SAMS reviews applicants one by one and prefers companies with their own Ex-competent technical and service staff, since certified devices must not be repaired outside approved channels.
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.
There is no list price yet. SAMS gives indicative pre-launch pricing in writing, against a stated quantity and site, and does not commit to a lead time before certification completes.
Zone 1 and Zone 21 (gas and dust) with gas group IIC and temperature class T4, subject to certification. It must not be used in a classified area before its certificate is issued and the site has accepted it.
Likely candidates are refinery process units, petrochemical plants, tank farms, dock and terminal loading areas. Which areas are classified, and to what zone, is set by the site operator's own area classification drawings.
Apply through the distributor page with your company details and the territory you cover. SAMS reviews applications company by company and has not yet granted a territory for Houston and the Houston Ship Channel.
Houston typically sees highs of 90 degrees Fahrenheit or more on over 100 days a year, with high humidity from the Gulf. Check a handset's stated operating range and humidity rating on its datasheet, and avoid leaving devices in closed vehicles.
The channel is lined with refineries and chemical plants, with major private complexes at Baytown and Deer Park and public terminals at the Turning Basin, Barbours Cut and Bayport. Always confirm which operator controls the specific gate you are visiting.
No. The IS-04Z1 is pre-launch and certification is in progress, so no certificate exists. Each refinery and chemical operator along the channel sets its own contractor and equipment approvals. A buyer can evaluate the datasheet and a safe-area use now, and should confirm requirements with the site operator.
More on Houston, and on other places in United States.
Send the site, zone and gas group and roughly how many handsets. We reply by email with the datasheet and the certification schedule.
Send the zone and gas group of your site and we will reply with the datasheet and schedule.