ModSensorsTrailer gas detection for H₂S, methane and CO
Crews wear personal gas monitors on the job and hang them on a hook when they come in to eat or sleep. A closed trailer is where gas builds up with nobody awake to notice.
What it detects
Methane, H₂S and CO sensors wire to the hub in the trailer. They mount inside, in the wellsite office, the dry shack or the sleeper unit, and the status screen by the door shows the reading to whoever is on site. Tank and power sensors share the same hub, so gas sensors can go onto a trailer already fitted; pricing covers how fleets add sensors.
When it trips
One example rule, H₂S above 5 ppm, from reading to alarm.
- Reading crosses the rule. The H₂S sensor in the trailer reads above 5 ppm. The hub checks the reading against the rule you set and trips the alarm.
- Horn and beacon in the trailer. The horn sounds and the beacon wired to a relay output comes on. Anyone inside hears it.
- Alert on the phones. At the same moment the alert reaches every phone on the list, naming the trailer and the alarm. It goes over the cellular connection and needs a signal.
- Local alarm keeps going. The horn and beacon run on the trailer and need no signal. If mains is lost, battery backup keeps the hub and the horn running.
What it does and what it does not
What the trailer alarm covers, and what stays with the monitors your crew wears.
It does
A fixed alarm for the hours when nobody is wearing a monitor.
- Reads methane, H₂S and CO at one point inside the trailer.
- Sounds the horn and switches a beacon on the trailer, with or without a cell signal.
- Sends the alert to the phones on your list, over cellular.
- Follows rules you set: the gas, the threshold, the outputs, the people.
It does not
Not a personal monitor, and we make no claim that it meets any safety standard.
- Read gas outside the trailer or follow a worker around the site.
- Replace the personal monitors your crew wears on the job.
- Reach the phones without a cell signal; the horn still sounds.
- Set the threshold for you; the 5 ppm above is an example, and your site's rules give the number.
Set the rules once
Rules are set once, on the status screen by the door or in the app, and apply to every trailer. A rule names the gas, the threshold, which of the hub's four relay outputs fire, and who is told. Each person on the list gets push, SMS or both; the app page covers the phones and the dashboard.
One set of rules covers every wellsite trailer and sleeper unit at your oil and gas camps. Relay wiring for industrial horns, beacons and locks, and armed hours per output, are on the alarm control page.
Specifications
| Gases | Methane, H₂S, CO |
|---|---|
| Outputs on alarm | Horn on the trailer; four relay outputs for industrial horns, beacons and locks |
| Alerts | Push notification and SMS, set per person; alerts name the trailer and the alarm |
| Rules | Set once on the status screen or in the app; apply to every trailer |
| Connectivity | Horn and relays need no signal; phone alerts need cellular; external antenna option |
| Power | 120 V mains or 12/24 V solar and battery; battery backup when mains is lost |
| Operating range | Inside the trailer; −30 to +50 °C |
Common questions
Does the gas alarm work without a cell signal?
The horn, the beacon and the status screen do. They run on the trailer and keep working on a site with no coverage, and on battery backup if mains is lost. The phone alert and SMS need the cellular connection; on a weak-signal site an external antenna can be fitted.
Does this replace our crew's personal gas monitors?
No. The trailer sensors are a fixed alarm for the hours when the monitors hang on a hook. Crews keep wearing their monitors on the job, and we make no claim that the system meets any safety standard.
Where are the gas sensors mounted?
Inside the trailer, in the wellsite office, dry shack or sleeper unit, like every sensor except the camera. They wire to the hub and are rated for −30 to +50 °C.
Can a gas alarm switch on a beacon or other device?
Yes. The hub has four relay outputs, each switching an industrial horn, a beacon or a lock you wire to it. A gas rule names which outputs fire, and the phone alert goes out at the same moment. Wiring and armed hours per output are on the alarm control page.
Talk to us
Tell us how many trailers and where they sit. We will send a quote the same day.